thietkemang

THIT K MNG LAN -WANTP.HCM 04-2007Ging vin: Trnh Huy HongEmail: [email protected]

NI DUNGTng quan mng my tnhB giao thc TCP/IPMng LAN v thit k mng LANMng WAN v thit k mng WAN

Tng quan v mng my tnhKhi nim Phn loi mng my tnhM hnh OSIMt s b giao thc kt ni mng

Mng my tnh l hai hay nhiu my tnh c kt ni vi nhau theo mt phng thc no Trao i thng tin Chia s ti nguyn dng chungKhi nimTng quan v mng my tnh

Tng quan v mng my tnh S dng chung cc cng c tin ch Chia s kho d liu chung Tng tin cy ca h thng Trao i thng tin, hnh nh Dng chung cc thit b ngoi vi Gim chi ph v thi gian i li

Li ch ca vic s dng mng my tnh

Tng quan v mng my tnhPhn loi mng :Theo phng thc kt niTheo vng a lTheo cu trcTheo chc nng

Tng quan v mng my tnhPhn loi mng :Theo phng thc kt niPoint to Point : ng truyn ring bit c thit lp ni cc cp my tnh vi nhau

Tng quan v mng my tnhPhn loi mng :Theo phng thc kt niPoint to Multipoint : T mt trm c th kt ni n nhiu trm

Tng quan v mng my tnhPhn loi mng :GAN (Global Area Network) : kt ni gia cc chu lc.WAN (Wide Area Network) : kt ni trong ni b cc quc gia hay gia cc quc gia trong cng chu lc.MAN (Metropolitan Area Network) : kt ni trong phm vi thnh ph.LAN (Local Area Network) : kt ni trong vng bn knh hp vi trm mt, s dng ng truyn tc cao. Theo vng a l

Tng quan v mng my tnhPhn loi mng :Theo TopologyStar : cc trm ni vo mt thit b trung tm c nhim v nhn tn hiu t cc trm v chuyn n ch theo phng thc point to point

Tng quan v mng my tnhPhn loi mng :Theo TopologyBus : cc my tnh c ni vo mt ng truyn chnh( c gi l bus )

Tng quan v mng my tnhPhn loi mng :Theo TopologyRing : cc my tnh c lin kt thnh mt vng trn theo phng thc im - im

Tng quan v mng my tnhPhn loi mng :Theo TopologyKt hp : s dng kt hp cc loi Ring, Bus, Star tn dng cc im mnh ca mi dng

Tng quan v mng my tnhPhn loi mng :Theo chc nngClient Server :mt s my c thit lp nh server cung cp dch v, cc my s dng l clientMng peer-to-peer : cc my tnh trong mng va c th hot ng nh client va nh mt server

Tng quan v mng my tnhPhn bit gia mng LAN v WAN:

Tng quan v mng my tnhM hnh tham chiu OSI (Open Systems Interconnection)Kh nng kt niKh nng pht trinn gin haChun haS pht trin cc chun mng v s ra i ca m hnh tham chiu OSI

Tng quan v mng my tnhM hnh OSI ( Open Systems Interconnection)OSI ( Open Systems Interconnection) : Ra i nm 1984 - L tp hp cc c im k thut m t kin trc mng dnh cho vic kt ni cc thit b khng cng chng loi

Tng quan v mng my tnhCu trc phn lp ca m hnh OSILayer 7: ApplicationLayer 6: PresentationLayer 5: SessionLayer 4: TransportLayer 3: NetworkLayer 2: Data LinkLayer 1: Physical

Tng quan v mng my tnhM hnh OSI ( Open systems Interconnection)Chc nng : Cung cp giao tip gia chng trnh ng dng cho ngi s dng vi h thng mng Trnh by cc c t k thut gii quyt vn giao tip gia cc chng trnh ng dng vi h thng mngV d : Cc ng dng HTTP, Telnet, FTP, Mail

Tng quan v mng my tnhM hnh OSI ( Open systems Interconnection)Chc nng : m bo cc dng thc biu din thng tin ca cc ng dng sao cho cc h thng trn mng c th hiu c. Trnh by cc c t k thut cc dng thc biu din thng tin nh : m ho, gii m, nn, cc dng thc file nh. JPEG, ASCII, GIF, MPEG, Encryption

Tng quan v mng my tnhM hnh OSI ( Open systems Interconnection)Chc nng : Thit lp, qun l, kt thc cc phin (session) giao dch, trao i d liu trn mng gia cc ng dngTrnh by cc c t k thut thc hin qu trnh trn.V d : RPC, SQL,NFS

Tng quan v mng my tnhM hnh OSI ( Open systems Interconnection)Chc nng : m bo tin cy cho cc gi tin truyn ti trong mng.Trnh by cc c t k thut thc hin vic : nh th t v m bo th t truyn cc gi tin, ghp/tch d liu t cc gi tin n t mt ng dng,chn la giao thc truyn nhn d liu c hay khng c ch sa li.V d : TCP,UDP

Tng quan v mng my tnhM hnh OSI ( Open systems Interconnection)Chc nng : m bo qu trnh chuyn giao cc gi tin gia cc h thng trn mng thng qua vic xc nh ng dn, x l gi tin, chuyn giao gi tin n cc h thng.Trnh by cc c im k thut v a ch logic cho cc thit b mng, c ch nh tuyn, cc giao thc nh tuyn, mch o.

Tng quan v mng my tnhM hnh OSI ( Open systems Interconnection)Chc nng :m bo kh nng truyn ti d liu trn ng truyn vt l mt cch tin cy. n v d liu l cc FrameTrnh by cc c t k thut bao gm dng thc d liu, i ch gi nhn, c ch truy cp ng truynV d : HDLC, FrameRelay, PPP, IEEE 802.3/802.2

Tng quan v mng my tnhM hnh OSI ( Open systems Interconnection)Chc nng: Chuyn ti cc dng bit khng c cu trc trn ng truyn vt l. n v d liu l cc bitTrnh by cc c t v in v vt l ca mng : giao tip vt l, c tnh in ca cc giao tip, c ly v tc truyn d liu.V d : V.35, V.24, RJ45, EIA/TIA-232, 802.3

Tng quan v mng my tnhV d v mt qu trnh ng gi d liu

Tng quan v mng my tnhTng tc gia cc lp trong m hnh OSIBc 1: Lp vt l m bo ng b bit, t cc mu bit trong buffer, thng bo cho lp datalink v frame nhn c sau khi gii m tn hiu t chui bit nhn cBc 2 : Lp datalink kim tra FCS trong trailer cua frame nhn c pht hin li trong truyn dn, nu pht hin li th loi b frame, kim tra a ch datalink, nu ng th chuyn data gia header v trailer ca frame ln software lp 3

Tng quan v mng my tnhTng tc gia cc lp trong m hnh OSIBc 3 : Lp network kim tra a ch lp 3, nu ng th x l tip v chuyn d liu sau header lp 3 cho software lp 4Bc 4 : Lp transport khi phc cc on d liu n theo ng th t bng thng tin ACK trong header v chuyn cho lp session

Tng quan v mng my tnhTng tc gia cc lp trong m hnh OSIBc 5 : Lp session m bo chui cc message nhn y , sau chuyn cho lp presentation.Bc 6 : Lp presentation chuyn i d liu, chuyn cho lp ng dng.Bc 7 : Lp ng dng x l header cui cng cha cc thng tin v cc tham s chng trnh ng dng gia 2 host.

Tng quan v mng my tnhMt s b giao thc kt ni mngTCP/IP :C kh nng lin kt nhiu loi my tnh khc nhau.L chun Internet ton cu.NetBEUI :c cung cp theo cc sn phm ca IBM, MicrosoftKhng h tr nh tuyn, ch s dng da vo mng Microsoft

Tng quan v mng my tnhMt s b giao thc kt ni mngIPX/SPX : S dng trong mng NovellNh nhanh v hiu qu trn cc mng cc b, c h tr nh tuynDECnet : Giao thc c quyn ca hng Digital Equipment Corporationnh ngha m hnh truyn thng qua LAN, MAN, WAN, c h tr nh tuyn

B giao thc TCP/IPTng quan v b giao thc TCP/IP Cc giao thc ca b giao thc TCP/IPCc dch v trn mng s dng b giao thc TCP/IP

B giao thc TCP/IPTng quan v b giao thc TCP/IPLch s ra i v pht trinT nhng nm 60 ra i cc h thng mng, lin mng, khi u l mng ARPANET ca b quc phng M.u thp nin 70 cc nh khoa hc bt tay vo nghin cu cc giao thc lin mng ( internetworking )B giao thc TCP/IP c cng b v hon thin vo khong 1978

B giao thc TCP/IPTng quan v b giao thc TCP/IPLch s ra i v pht trin ( tip theo )1980 DARPA chnh thc chuyn mng ARPANET t mng nghin cu sang s dng b giao thc TCP/IP, khi nim Internet xut hin t 1983 : Qu trnh chuyn i chnh thc hon thnh khi DARPA yu cu tt c cc my tnh mun kt ni mng vi ARPANET phi s dng TCP/IP, mng ARPANET chnh thc tr thnh mng thng mi

Lp 4: ApplicationLp 3: TransportLp 2: InternetLp 1: Network accessB giao thc TCP/IPMt s lp trong m hnh TCP/IP c cng tn vi m hnh OSI. Tuy nhin khng nn nhm ln gi hai m hnh ny. Tng quan v b giao thc TCP/IPCu trc phn lp ca b giao thc TCP/IP

B giao thc TCP/IPTng quan v b giao thc TCP/IPSo snh cu trc phn lp

B giao thc TCP/IPTng quan v b giao thc TCP/IPCu trc phn lp ca b giao thc TCP/IPChc nng : Cung cp cc chng trnh ng dng trn mng TCP/IP. Thc hin cc chc nng ca cc lp cao nht trong m hnh 7 lp bao gm : M ho/gii m, nn, nh dng d liu, thit lp/gii phng phin giao dchV d : Cc ng dng HTTP, Telnet, FTP, Mail

B giao thc TCP/IPTng quan v b giao thc TCP/IPCu trc phn lp ca b giao thc TCP/IPChc nng : Thc hin chc nng chuyn vn lung d liu gia 2 trmm bo tin cy, iu khin lung, pht hin v sa li.C 2 giao thc chnh l TCP v UDP

B giao thc TCP/IPTng quan v b giao thc TCP/IPCu trc phn lp ca b giao thc TCP/IPChc nng : Thc hin chc nng x l v truyn gi tin trn mng.Cc qu trnh nh tuyn c thc hin lp nyC cc giao thc gm IP, ICMP ( Internet Control Message Pprotocol), IGMP ( Internet Group Message Protocol)

B giao thc TCP/IPTng quan v b giao thc TCP/IPCu trc phn lp ca b giao thc TCP/IPChc nng : thc hin chc nng giao tip mi trng mng, chuyn giao dng d liu ln ng truyn vy l.Thc hin chc nng tng ng lp 1,2 ca m hnh OSI

B giao thc TCP/IPTng quan v b giao thc TCP/IPCu trc giao thc ca b giao thc TCP/IPEthernet, Token-Ring, FrameRelay, ATMICMPARP

RARP

IPUDPTCPSMTP,HTTP, FTP, Telnet

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IPIP : Internet Protocol l giao thc quan trng nht trong b giao thc TCP/IP- Cung cp kh nng kt ni cc mng con thnh lin mng.ng gi d liu thnh cc datagram v phn pht datagram theo kiu khng lin kt, khng tin cyChu trch nhim v a ch lp mng, cc giao thc nh tuynC 2 phin bn a ch: IPv4, IPv6

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungVersion : Phin bn ca giao thc IP

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungIHL : Chiu di ca header tnh bng word 32 bit

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungType of service: c t tham s v yu cu dch v

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungTotal length: Chiu di tng cng ca IP Datagram (byte)

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungIdentification: nh danh, kt hp vi cc tham s khc nh Sadd, Dadd nh danh duy nht cho mi datagram c gi i

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungFlag: S dng trong khi phn on cc datagram

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungFragmentation Offset: Ch v tr ca on phn mnh trong datagram tnh theo n v 64bit

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungTime to Live: Thit lp thi gian tn ti ca datagram

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungProtocol: Ch giao thc tng trn k tip

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungHeader checksum: Kim tra li ca phn header

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungSource Address : i ch IP trm ngun

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungDestination Address : i ch IP trm ch

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc khungOption : Khai bo cc ty chn do ngi gi yu cu

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc a ch IPC di 32bit, c biu din di dng thp phn gm 4 vng, mi vng 1 byte cch nhau bng du chm. V d 203.162.7.92Chia lm 2 phn: network, host IP address = . Da trn s bit cp cho hai phn trn m a ch IP c chia lm 5 lp A, B, C, D, E

Lp A :Bit u l 0, 7 bit tip theo i ch mng v 24 bit cui l a ch host 126 mng v 16 triu trm/mi mngLp B : 2bit u l 1v 0, 14 bit tip theo a ch mng v 16 bit cui a ch host 16384 mng v ti a 65535 trm/mi mngLp C : 3 bit u l 110, 21 bit tip theo l i ch mng v 8 bit cui l a ch host 2 triu mng v ti a 254 trm/mi mng.B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc a ch IP

Lp D :4 Bit u l 1110 lp a ch ny c s dng gi gi tin IP n mt nhm host trn mng ( cn gi l lp a ch Multicast ).Lp E : 5 bit u l 11110 hin cha s dng.B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc a ch IP

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc a ch IPC th s dng c byte u tin nhn dng lp a ch IP nh sau :Nh hn 128 : i ch thuc lp A, byte u l a ch mng, 3 byte tip theo l a ch hostT 128 n 191 : i ch thuc lp B, 2 byte u tin l a ch mng, 2 byte tip theo l a ch host.T 192 n 223 : i ch thuc lp C, 3 byte u tin l a ch mng, byte cui cng l a ch host.T 224 n 239 : L a ch Multicast, khng c phn i ch mngLn hn 239 l a ch cha s dng

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc a ch IP

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc a ch IP s dng vi cc mng nh, c th phn chia cc lp mng thnh nhiu lp mng con ( subnet), s dng mt s bit trong hostID lm subnet ID.

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc a ch IPMt n i ch mng con ( Subnet mask ) :Gi tr s 32 bit, c biu din tng t mt i ch IP.Dng xc nh bao nhiu bit trong trng host ID c dng lm i ch mng con.Gi tr Subnetmask c thc hin php AND logic vi gi tr i ch IP xc nh i ch subnetBiu din Subnet mask nh sau : Tt c cc bit thuc netID v Subnet ID c t bng 1, cc bit cn li c t bng 0.

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc a ch IPMt n i ch mng con ( Subnet mask ) :V d v Subnet mask : C a ch mng lp C l : 203.162.7.0Chia lp mng ny ra thnh 64 subnet nh :

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - cu trc a ch IPCc a ch IP c bit :

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP Phn mng v hp nht cc gi IPKhi tng IP nhn c cc datagram gi i, n s so snh vi kch thc cc i cho php MTU ( Maximum Transfer Unit ) ca giao thc ( v tng d liu qui nh kch thc ln nht ca mt Frame c th truyn ti i c ), nu mt IP datagram ln hn MTU th phi phn mnh thnh cc gi nh hn. Qu trnh ngc li s c thc hin ti pha nhn

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - nh tuyn trong mng IPL chc nng quan trng ca giao thc IPVic chn tuyn c thc hin theo trnh t sau :Nhn datagram t cc giao thc lp trn nh TCP, UDPTm trong bng nh tuyn theo a ch chTm theo defaultNu datagram khng c chuyn tip th gi thng bo li host unreachable hoc network unreachable

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc IP - nh tuyn trong mng IPIP duy tr mt bng nh tuyn truy nhp khi c gi cn chuyn i gm cc thng tin :a ch IP cha ch IP ca router k tipFlag : xc nh a ch ca router k tip l a ch mt host hay mt mngInterface : trn thit b forward gi qua

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPCc giao thc iu khin ICPM, ARP, RARPGiao thc ICMP Internet Control Message Protocol : Dng trao i thng tin iu khin dng s liu, thng bo li v cc thng tin trng thi khc.Giao thc ARP - Address Resolution protocol : Dng chuyn a ch lp mng (a ch IP) thnh a ch lp datalink (a ch MAC).Giao thc RARP - Reverse Address Resolution Protocol: Dng chuyn a ch MAC thnh a ch IP.

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc UDP ( User Datagram Protocol )L giao thc khng lin kt, cung cp dch v giao vn khng tin cy.UDP khng c chc nng thit lp v gii phng kt ni, khng c c ch bo nhn ( ACK), khng sp xp tun t cc n v d liu ( datagram).Khun dng ca UDP datagram c m t nh sau :

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc UDP ( User Datagram Protocol )

Source Port : 16 bit - S hiu cng ni gi datagramDestination port : 16 bit - S hiu cng ni datagram c chuyn tiLength : di UDP packet -16 bit- y l di tng cng k c phn header ca gi datagramUDP Checksum : 16 bit dng kim sot li, nu pht hin li th UDP datagram s b loi b m khng c thng bo no tr li cho ni gi B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc UDP ( User Datagram Protocol )

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc TCP ( Transmision Control Protocol )L mt giao thc hng kt ni, cung cp kh nng chuyn ti d liu tin cy gia cc h trm trn mng.Thit lp cc kt ni logic gia cc trm trn mng trc khi thc s truyn d liu ca cc ng dng ( qu trnh thit lp kt ni 3 bc three-way handshake )TCP thc hin pht hin v sa li ( yu cu pht li) m bo tin cy ca vic truyn d liu.

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc TCP ( Transmision Control Protocol )

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc TCP ( Transmision Control Protocol )Source Port : 16 bit - S hiu cng ni gi datagramDestination port : 16 bit - S hiu cng ni datagram c chuyn tiSequence Number : 32 bit - S hiu duy tr s tun t ca cc byte d liu c truyn, bit SYN c dng trong qu trnh thit lp kt niAcknowledgment Number : 32 bit - S hiu duy tr s tun t ca cc byte d liu c truyn, bit ACK c dng trong qu trnh thit lp kt ni.

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc TCP ( Transmision Control Protocol )Window size : 16 bit S byte ti a m trm ch c th nhn, s dng c ch window kim sot lung d liuChecksum : 16 bit M kim sot li cho ton segment, k c header v phn d liu. Option : di thay i Khai bo ty chn ca TCP, trong thng l kch thc ca i ca 1 segment ( MSS)TCP data: di thay i - Cha d liu ca lp ng dng, kch thc ngm nh l 536 byte, gi tr ny c th iu chnh bng cch khai bo trong phn Option

B giao thc TCP/IPCc giao thc trong b giao thc TCP/IPGiao thc TCP ( Transmision Control Protocol )Qu trnh thit lp kt ni TCP ( Three-way handshake )Host A khi to kt ni bng vic send n B mt segment vi bit Synchronize sequence number (SYN) c set yu cu thit lp kt nHost B p ng yu cu bng cch gi li Host A mt segment vi bit ACK (Acknowledgment) v bit SYN c set.Kt ni c thit lp, qu trnh truyn d liu bt u .

B giao thc TCP/IPTng quan v b giao thc TCP/IP Cc giao thc ca b giao thc TCP/IPCc dch v c bn trn mng TCP/IP

B giao thc TCP/IPCc dch v c bn trn mng TCP/IPDch v truy nhp t xa - TelnetMng cng cngM hnh truy cp s dng dch v Telnet

B giao thc TCP/IPCc dch v c bn trn mng TCP/IPDch v truy nhp t xa - TelnetCho php truy cp t xa vo mt h thng trn mngC th iu khin ton din h thng t xa.ng dng Telnet s dng giao thc TCP,port 23

B giao thc TCP/IPCc dch v c bn trn mng TCP/IPDch v FTP ( truyn file )Mng cng cngFTP Server/clientFTP Server/clientFTP client

B giao thc TCP/IPCc dch v c bn trn mng TCP/IPDch v truy nhp t xa FTP ( truyn file )Cho php chuyn cc file d liu trn mng gia cc my tnh khc nhau.FTP h tr tt c cc nh dng file, k c file nh phnDch v FTP hot ng theo m hnh Client-Server, s dng giao thc TCP, port 21Trn my ch FTP, c th khai bo kim sot quyn truy nhp, gii hn s truy nhp ti a v.v.v

B giao thc TCP/IPCc dch v c bn trn mng TCP/IPDch v World Wide Web (WWW )Mng cng cngWeb ServerWeb client/Browser

B giao thc TCP/IPCc dch v c bn trn mng TCP/IPDch v World Wide Web (WWW )Cc trang WWW : Cc ti liu s m dng ngn ng HTML (HyperText Markup Language ) trnh by ni dung thng tin. Trn mt trang ti liu www, c th trnh by hnh nh, text, cc lin kt n cc ti nguyn thng tin khc v.v.v Ngi s dng u cui s cc Web client hay cn gi l Web browser truy xut cc ti liu www trn mngMi ti liu www trn mng c nh danh bi mt URL ( Unique resource location ), cc web client s gi cc yu cu n cc URL tng ng vi ti liu cn truy xut.

B giao thc TCP/IPCc dch v c bn trn mng TCP/IPDch v World Wide Web (WWW )Dch v web s dng m hnh truy nhp client - server. Web server s dng giao thc HTTP ( HyperText Transfer Protocol) lp application chuyn giao cc ti liu HTML trn mng. Giao thc HTTP s dng giao thc TCP , port 80 lm hot ng tng chuyn vn d liu trn mng

B giao thc TCP/IPCc dch v c bn trn mng TCP/IPDch v th in t (Email )Mng cng cngMail ServerMail client

B giao thc TCP/IPCc dch v c bn trn mng TCP/IPDch v th in t (Email )Cho php trao i cc thng ip trn mng hay cn gi l th in t.Th in t hot ng theo m hnh client server , ngi s dng dch v th in t cn c chng mail client, sau khi son ni dung th, xc nh a ch gi th v gi th n my ch dch v Mail ( Mail Server ) H thng th in t s dng giao thc POP3, IMAP nhn th v v SMTP gi th i.

Cc khi nim c bn v LANCng ngh EthernetCc k thut chuyn mch trong LANThit k mng LANMt s mng LAN muMng LAN v thit k mng LAN

Cc khi nim c bn v mng LANMng LAN v thit k mng LANCc cu trc mngCc phng thc truy nhp ng truynCc loi ng truyn v chunCc loi cp dng cho LANCc thit b kt ni trong LAN

Khi nim : H thng c thit k kt ni cc my tnh thit b khc nhau cng hot ng trong mt khu vc a l nhCu trc mng : Dng hnh sao Star Topology Dng bus Bus Topology Dng vng Ring Topology Dng kt hp Mesh TopologyMng LAN v thit k mng LANCc khi nim c bn v mng LAN

Cu trc Dng Star :u imCc thit b kt ni mng c lp, do mt thit b hng - > mng vn hot ng ucCu trc n gin.D m rng, thu hp.Nhc imSingle point of failureKhong cch t mi my n trung tm ngn (100m)

Mng LAN v thit k mng LANCc khi nim c bn v mng LAN

Dng Bus :u im : t cp, d lp t, gi thnh r Nhc im :n tc lu lng chuyn trong mng lnKh pht hin h, mun sa phi ngng ton b h thngMng LAN v thit k mng LANCc khi nim c bn v mng LAN

Dng Ring :u imC th ni rng vi cp t hn hai kiu trnMi trm c th t tc ti a khi truy cpNhc im :ng dy khp kn, nu ngt ti mt v tr th ton mng ngng hot ng


Dng Mesh :u im : Mi thit b u c lin kt im - im n cc thit b khcm bo QoS, security, d pht hin v c lp liNhc im :t tin, kh ci t


Mng LAN v thit k mng LANCc loi loi cp dng trong LANCp xon Cc i cp ng xon vo nhau nhm gim nhiu in tLoi C v bc (STP Shield Twisted Pair)Khng v bc (UTP- Unshield Twisted Pair) km hn cp STP v kh nng chng nhiu v suy hao

Mng LAN v thit k mng LANCc loi loi cp dng trong LANCp xon gm cc loi Cat 1 & Cat 2 : truyn thoi v cc ng truyn tc thpCat 3 : truyn d liu 16Mb/s, chun ca mng in thoiCat 4 : dng cho ng truyn 20Mb/sCat 5 : dng cho ng truyn 100Mb/sCat 6 : dng cho ng truyn 300Mb/s

Mng LAN v thit k mng LANCc loi loi cp dng trong LANCp ng trcGm 2 dy dn, mt dy dn trung tm v mt dy bao boc bn ngoiC suy hao t hn so vi cc loi cp ng khcGm 2 loi :Thin Ethernet v Thick Ethernet

Mng LAN v thit k mng LANCc loi loi cp dng trong LANCp si quang Di thng ln, cho php tn hiu i xa vi suy hao thp, t b nh hng bi nhiu tKh lp t, gi thnh cao

Mng LAN v thit k mng LANCc thit b kt ni trong LANRepeater :Hot ng ti lp 1Nhim v : khuch i tn hiu b suy hao, khi phc tn hiu ban u m rng khong cch hot ng. Loi b nhiu, mo

Mng LAN v thit k mng LANCc thit b kt ni trong LANRepeater :

Mng LAN v thit k mng LANCc thit b kt ni trong LANHub :Hot ng ti lp 1, hot ng nh repeater nhiu cngL im tp trung kt ni trung tm ca mng

Mng LAN v thit k mng LANCc thit b kt ni trong LANHub :HUB

Mng LAN v thit k mng LANCc thit b kt ni trong LANBridgeHot ng ti lp 2Nhim v : ni hai mng ging nhau hoc khc nhau, s dng a ch MAC

Mng LAN v thit k mng LANCc thit b kt ni trong LANBridgeBridge

Mng LAN v thit k mng LANCc thit b kt ni trong LANSwitch :Hot ng ti lp 2 , hot ng nh Bridge nhng c nhiu portNhim v : S dng a ch Mac, thut ton Spanning Tree

Mng LAN v thit k mng LANCc thit b kt ni trong LANSwitch :

Mng LAN v thit k mng LANCc thit b kt ni trong LANRouter :Hot ng ti lp networkNhim v: tm ng i tt nht cho gi bng cc thut ton nh tuyn, a ch IP

Mng LAN v thit k mng LANCc thit b kt ni trong LANRouter :LAN Switch

Mng LAN v thit k mng LANCc thit b kt ni trong LANLayer 3 switch :Hot ng ti lp 3C th chy cc giao thc nh tuyn lp mng, mt dng tng tnh nng cho router

Mng LAN v thit k mng LANCc phng thc truy nhp ng truynCSMA/CDToken passingFDDI

Mng LAN v thit k mng LANCc phng thc truy nhp ng truynCSMA/CD (Carrier Sense Multiple Access with collision Detection)Phng php truy nhp s dng trong mng dng BUSTi mt thi im ch c mt trm c pht d liu bng cch lng nghe, xc nh ng truyn riCollision : 2 hoc nhiu trm cng pht -> gim tc h thng

Mng LAN v thit k mng LANCc phng thc truy nhp ng truynCSMA/CD (Carrier Sense Multiple Access with collision Detection)Cc nguy c xy ra collision : S trm lm vic nhiu Chiu di mng ln Chiu di gi tin ( MTU) ln

Mng LAN v thit k mng LANCc phng thc truy nhp ng truynToken Passing Phng php truy nhp s dng trong mng dng RINGS dng th bi (token) cp quyn truy nhpKhng xy ra ng d liu -> mng vn hot ng tt khi lu lng lnC th xy ra vic mt token hoc token bo bn di chuyn khng dng

Mng LAN v thit k mng LANCc phng thc truy nhp ng truynFDDI Dng cho mng cu trc vng, chuyn th bi tc cao bng cp quangS dng h thng chuyn th bi trong vng kp, gm 2 lung ging nhau theo 2 hng ngc nhau

Mng LAN v thit k mng LANCc loi ng truyn v cc chuynChun IEEEIEEE 802.0 - LAN and MAN (Metropolitan Area Network)IEEE 802.1 - Higher level interface standardIEEE 802.1k - Supplement to LAN and MAN management standard (6/93)IEEE 802.2 - Logical link control standardIEEE 802.3 - CSMA/CD standardIEEE 802.4 - Token-passing bus standardIEEE 802.5 - Token-passing ring standard

Mng LAN v thit k mng LANCc loi ng truyn v cc chuynChun CCITTChun cp, giao tip EIA nh ngha giao tip gia modem v my tnh : RS-232; RS-449; RS-422Cc chun V22, V28, V35

Mng LAN v thit k mng LANCng ngh EthernetGii thiu chungCc c tnh chung ca EthernetCc loi mng Ethernet

Mng LAN v thit k mng LANCng ngh EthernetCc c tnh chung ca EthernetChun hot ng 2 lp OSI : Data link v physical link.Tng t tiu chun IEEE 802.3 ( khc nhau cht t cu trc cc frame d liu )S dng CSMA/CD lm phng thc truy nhp ng truyn.

Mng LAN v thit k mng LANCng ngh EthernetCc c tnh chung ca EthernetCu trc khungEthernetIEEE 802.3

Mng LAN v thit k mng LANCng ngh EthernetCc c tnh chung ca EthernetCu trc khungPREAMBLE - 62 bits, allows the Physical Layer Signalling (PLS) circuitry to synchronize with the receive frame timing circuitry.SYNC (Synchronize) - 2 bits, indicates that the data portion of the frame will follow.DA (Destination Address) and SA (Source Address) - 48 bits, Media Access

Mng LAN v thit k mng LANCng ngh EthernetCc c tnh chung ca EthernetCu trc khungControl (MAC) address. Three types of destination addressing are supported:Individual: The DA contains the unique address of one node on the network.Multicast: If the first bit of the DA is set, it denotes that a group address is being used. The group that is being addressed will be determined by a higher layer function.Broadcast: When the DA field is set to all 1 s, it indicates a broadcast.A broadcast is a special form of multicast. All nodes on the network must be capable of receiving a broadcast.

Mng LAN v thit k mng LANCng ngh EthernetCc c tnh chung ca EthernetCu trc khungCu trc khung dng cho mi tc t 10Mbs n 10000 MbitsKhung Ethernet c di khng nh hn 48 octec, khng ln hn 1518 octec

Mng LAN v thit k mng LANCng ngh EthernetCc c tnh chung ca EthernetCu trc i ch EthernetGm 48 bitc n nh khi thit b c sn xutL a ch duy nhtGm 2 phn :3 Octec u : xc nh hng sn xut3 Octect sau : do nh sn xut xc nh V d : 00-00-0c-12-34-56

Mng LAN v thit k mng LANCng ngh EthernetCc c tnh chung ca EthernetCc loi khungKhung unicast : khung c truyn n mt trm xc nhKhung broadcast: c a ch MAC FF-FF-FF-FF-FF-FF gi cho tt c cc trm.Khung multicast : gi n mt s trm nht nh.

Mng LAN v thit k mng LANCng ngh EthernetCc c tnh chung ca EthernetNguyn tc hot ng

Mng LAN v thit k mng LANCng ngh EthernetCc c tnh chung ca EthernetNguyn tc hot ngCch truyn v pht hin xung t : Da trn phng thc CSMA/CDKhi pht hin ng truyn ri : my ch thi gian IFG (thi gian mt giao tip mng khi phc sau khi nhn khung - bng 96 ln thi gian ca 1 khung) ri bt u truynKhi ang truyn khung, pht hin xung t my truyn tip 32bit d liu (bit bo hiu tc nghn) v ch mt thi gian ngu nhin

Mng LAN v thit k mng LANCng ngh EthernetCc c tnh chung ca EthernetNguyn tc hot ngKhi mt trm thnh cng 512bit ( tng ng vi mt khung Ethernet nh nht)khng tnh trng preamble xem nh knh b chimKhi nim v Slot time :Khong thi gian ng vi thi gian ca 512 bit (64 octec) di chuyn t mt trm n mt trm xa nht trong min ng c gi l slotTimeMt mng Ethernet thit k ng phi tho mn : Thi gian tr tng cng ln nht truyn khung Ethernet t trm ny n trm kia phi nh hn slotTime.

Mng LAN v thit k mng LANCng ngh EthernetCc c tnh chung ca EthernetNguyn tc hot ngTham s Slot Time

Mng LAN v thit k mng LANCng ngh EthernetCc loi mng Ethernet H thng 10Mb/s 10Base5 : Tc 10M, bng tn c s, chiu di ti a l 500m, s dng cp ng trc loi dy, u ni loi N10Base2: Tc 10M, bng tn c s, chiu di ti a cho 1 on mng l 200m (185m), s dng cp ng trc loi mng ( RG-58A/U), u ni BNC.10BaseT : Tc 10M, bng tn c s, chiu di ti a cho 1 on mng l 100m, S dng cp xon i ( T= Twisted ), loi cp 0.4mm,0.5, 0.5 mm ng knh, u ni RJ-45.

Mng LAN v thit k mng LANCng ngh EthernetCc loi mng Ethernet H thng 100Mb/s 100BaseT : Tc 100M, bng tn c s, s dng cp xon i, u ni RJ-46100BaseX : Tc 100, s dng k thut m ho c bit ca chun FDDI, bao gm 100BaseFX ( cp quang a mode v 100BaseTx ( cp ng xon i , RJ-45 )100BaseT2 v 100BaseT4 : t s dng

Mng LAN v thit k mng LANCng ngh EthernetCc loi mng Ethernet H thng Giga Ethernet1000BaseX : S dng chun m ho c bit 8B/10B c dng trong h thng kt ni tc cao Fiber channel ) gm : 1000 Base-SX ( s dng cp si quan bc sng ngn ); 1000 Base-LX ( s dng si quang bc sng di v 1000 Base-CX ( s dng cp ng )1000BaseT : Tc Giga bit, bng tn c s trn cp xon ng loi Cat5 tr ln, RJ45

Mng LAN v thit k mng LANCc k thut chuyn mch trong LANPhn on mng trong LAN :Mc ch : phn chia bng thng hp l nhm s dng hiu qu bng thng p ng yu cu cc ng dng khc nhauMin xung t ( bandwidth domain) : l vng mng m cc khung pht ra c th gy xung t, cc trm chia s chung bng thngMin qung b ( broadcast domain) : l tp hp cc thit b c th nhn khung qung b t mt thit b trong nhm pht ra.

Mng LAN v thit k mng LANCc k thut chuyn mch trong LANPhn on bng repeater :M rng collision domainNhc im : hn ch khong cch xa nht gia hai trm, tng gi tr tr truyn khung

Mng LAN v thit k mng LANCc k thut chuyn mch trong LANPhn on bng bridge Lin kt cc collision domain trong cng mt broadcast domainu im : mi collision domain c mt slotTime ring nn m rng khong cch trong tng minNhc im : ch hot ng hiu qu theo quy tc 80/20

Mng LAN v thit k mng LANCc k thut chuyn mch trong LANPhn on bng router To ra cc collision domain v broadcast domain ring bit

Mng LAN v thit k mng LANCc k thut chuyn mch trong LANPhn on bng switch To ra cc collision domain ring v mt hoc nhiu broadcast domain ring.

Mng LAN v thit k mng LANCc k thut chuyn mch trong LANCc ch chuyn mch trong LAN : gm 2 loiStore and forward switching :Nhn ton b khung ti, kim tra s ton vn ca khung, sau mi chuyn tip khung u im : khung li khng chuyn t phn on ny sang phn on khcNhc im : c tr nht nh

Mng LAN v thit k mng LANCc k thut chuyn mch trong LANCc ch chuyn mch trong LAN : gm 2 loiCut through switching :c a ch ch trong header ca khung ri chuyn n cng tng ng, khng kim tra s ton vnNhanh hn ch Store and forward switching

Mng LAN v thit k mng LANCc k thut chuyn mch trong LANMng LAN o ( VLAN)Khi nim : Vic phn on mng ch phn on cc collission domain. Mt VLAN l mt broadcast domain c to bi mt hoc nhiu switch.u im : To ra cc nhm lm vic khng ph thuc thit b, v tr a lKim sot c cc broadcast domain, bo mtS dng thay cc router -> gi thnh r, hiu sut caoNhc im : cha c chun chnh thc, cn ph thuc vo nh sn xut thit b

Mng LAN v thit k mng LANCc k thut chuyn mch trong LANMng LAN o ( VLAN)Thit k VLAN Xc nh nhm logic :Theo nhm lm vicTheo dch vXc nh kh nng cc thit bXc nh a ch IP, VLAN ID, cu hnh

Mng LAN v thit k mng LANK thut thit k mng LANMt s nguyn tc thit k mng :Cc nguyn tc gim Collision trn mngNguyn tc phn on mng :Nguyn tc 80/20Nguyn tc 5-4-3

Mng LAN v thit k mng LANK thut thit k mng LANCc m hnh mng c bnM hnh phn cp :Cu trc :Core Layer, Distribution Layer, Access Layer.nh gi gi thnh :Gi thnh thp, D ci t, D m rng, c lp li.

Mng LAN v thit k mng LANK thut thit k mng LANM hnh c bnM hnh secure :LAN c lp gia mng cng tc vi mng bn ngoiRouter inside c ci filter packet gia DMZ v mng cng tcRouter outside c ci filter packet gia DMZ v mng ngoi

Mng LAN v thit k mng LANK thut thit k mng LANCc yu cu thit kYu cu k thutYu cu v hiu nngYu cu v ng dngYu cu v qun l mngYu cu v an ninh mngYu cu v ti chnh

Mng LAN v thit k mng LANK thut thit k mng LANCc bc thc hin mt thit kPhn tch yu cuLa chn phn cng : thit b, cp, cng ngh kt niLa chn phn mmnh gi kh nngTnh ton gi thnhTrin khai pilot

Mng LAN v thit k mng LANMt s mng LAN muCc bc thc hin mt thit kPhn tch yu cuLa chn phn cng : thit b, cp, cng ngh kt niLa chn phn mmnh gi kh nngTnh ton gi thnhTrin khai pilot

NI DUNGTng quan v mng my tnh B giao thc TCP/IP.Gii thiu mng LAN v thit k mng LANGii thiu mng WAN v thit k mng WAN

PHN 4 : MNG WAN & THIT K Tng quan v WANThit k mng WANPhn tch mt s WAN mu

Tng quan v WAN

Khi nimMt s cng ngh kt ni c bnGiao thc kt ni WAN trong TCP/IPCc thit b dng cho kt ni WANnh gi so snh cc cng ngh kt ni

Tng quan v mng WANKhi nim :WAN l mng thit lp lin kt cc my tnh, hay cc thit b mng khong cch xa v mt a lC th kt ni thnh mng ring ca mt t chc hay kt ni qua nhiu h tng chung ca cc cng ty vin thngCc cng ngh kt ni WAN lin quan n 3 lp ca m hnh OSI

Tng quan v mng WANCc li ch khi kt ni WAN :Cung cp cc dch v realtime, trao i d liu a phng tin nh hnh nh, m thanh, hp hi ngh Chia s, trao i ti nguyn trn mng d dngChnh xc v hiu qu cao do thng tin c x l bi nhiu my tnh, nhiu s gim stH tr cng tc qun l hng n nn kinh t in t, chnh ph in t

Tng quan v WAN


Tng quan v mng WANCc cng ngh kt ni trong WAN Chuyn mch knh - Cricuit Switching NerworkChuyn mch gi Packet Switching NetworkKt ni WAN dng VPN

Tng quan v mng WANMng chuyn mch :Mc ch : Thc hin vic lin kt gia hai im nt bng mt ng tm thi hoc dnh ring phc v cho vic thit lp kt ni.Chuyn mch c thc hin bi cc thit b chuyn mch trong mngPhn loi :Chuyn mch knhChuyn mch gi

Tng quan v mng WANChuyn mch knh :Nguyn tc hot ng : Kt ni c thit lp gia 2 node mng trc khi bt u truyn d liu

Tng quan v mng WANChuyn mch knh :Phn loi :Chuyn mch tng t - analog Chuyn mch s - digital :ISDNKnh thu ring Leased Line xDSL

Tng quan v mng WANChuyn mch tng t - analog :c thc hin qua mng in thoiDng modem chuyn cc tn hiu s t my tnh thnh tn hiu tng t truyn trn cc knh in thoi -> kt ni quay s (dial up)

Tng quan v mng WANChuyn mch s - digital :ISDN Intergrated Services Digital Network: Mng vin thng tch hp a dch v cho php s dng nhiu dch v trn ng dy in thoi

Tng quan v mng WANISDN Intergrated Services Digital Network:Gm 2 loi knh :Knh d liu (Data Channel): tn k thut B, tc 64Kbps, mang thoi, d liuKnh kim sot (Control channel); tn k thut D, tc 16 Kbps (Basic rate) v 64 Kbps ( Primary Rate) mang tn hiu bo hiu thit lp, gim st cuc gic chia lm 2 loi :Basic Rate : 2B+D tc 128 KbpsPrimary Rate : 64B+D tc T1; 20B+D tc E1

Tng quan v mng WANISDN Intergrated Services Digital Network :Cc thit b :ISDN adapterISDN Router nh gi :t hn in thoi nhng bng thng cao hnHnh thc kt ni lin tnh r Yu cu tng i in thoi phi h tr kt ni ISDN

Tng quan v mng WANLeased Line Network :Cch kt ni dnh ring gia 2 im c khong cch lnKhi s lng kt ni tng cao, ti cc nt mng s dng k thut ghp knh. C hai phng thc ghp knh chnh :Ghp knh theo tn s :Ghp knh theo thi gian :

Tng quan v mng WANLeased Line Network :Hin nay leased line c phn thnh hai lp chnhTx theo chun ca MEx theo chun ca Chu u, Nam M, Mhico

Tng quan v mng WANxDSL Digital Subscriber Line: Cng ngh ng dy thu bao sxDSL l k thut truyn dn d liu tc cao trn i dy cp ng truyn thngng dng :Pht cc ng dng gia cc usersHi tho videoTruy cp Internet tc caoIP FaxKt ni gia cc mng LAN, kt ni WANInteractive Multimedia

Tng quan v mng WANxDSL Digital Subscriber Line: Cng ngh ng dy thu bao sCu trc h thng :Modem xDSL DSLAM :POT splitter (nu c h tr thoi)BRASH thng truyn dn

Tng quan v mng WANxDSL Digital Subscriber Line: Cng ngh ng dy thu bao sx ch cc loi k thu t DSL khc nhau. Mi loi c nhng gii hn, tc v cc kh nng khc nhauChia lm hai nhm chnh l i xng v bt i xngi xng : HDSL, IDSL, SDSL, HDSL2, G.SHDSL. Bt i xng : ADSL,

Tng quan v mng WANH HDSL (High speed DSL) :

Tng quan v mng WANG.SHDSL (Single pair High bit-rate DSL) :Chun i xng cho php truyn vi tc 2.3Mbit/s cho c hai hng.Thch hp cho cc ng dng i hi bng thng cao trn c hai hng, thay th cho cc dch v T1, E1 vn t tin, kh bo dng ng dng: cung cp dch v Internet, truyn s liu vi nhiu loi tc 786kbit/s, 1.544Mbit/s, 2.3Mbit/s

Tng quan v mng WANG.SHDSL G.SHDSL ang c ch l do :c chun ho Ci thin tc hn v s dng bng tn hiu qu hn so vi HDSL, SDSL, HDSL2C ly truyn dn c ci thinBng ph tng thch vi ADSL

Tng quan v mng WANADSL ( Asymmetric Digital Subscriber Line )K thut bt i xng, tc hng xung t 1,5 n 8Mbps, hng ln t 16 n 640Kbits.H tr POT trn cng ng dyu im :Tc cao, thch hp cho truy cp InternetChi ph thit b u cui, lp t, bo dng thp.Kt ni lin tc, dnh ring.Nhc im :Ph thuc tc gia khong cch t nh thu bao n DSLAM

Tng quan v mng WANChuyn mch gi :Nguyn tc hot ng : Chia d liu thnh cc gi trc khi pht

Tng quan v mng WANChuyn mch gi :Phn loi :Hng kt ni connection : xc nh ng i bng mt gi, thng tin c lu trong cc chuyn mch trn ng i, cc gi ch cn lu IDHng khng kt ni connectionless : mi gi phi mang y thng tin a chng dng :Cng ngh ATMCng ngh Frame RelayCng ngh SMDS

Tng quan v mng WANCng ngh ATM :ATM l k thut c th truyn thoi, video v d liu qua cc mng private v mng public.c xy dng da trn kin trc cell, l phng thc truyn khng ng bn v d liu l cell. Mt cell c di c nh 53 byte, 5 byte header, 48 byte cha d liu.Kch thc cell nh hn cc frame ca Frame Relay, X25 nn hiu qu hn trong vic x l chuyn mch -> mng ATM l mng tc cao, iu khin qu trnh chuyn mch d dng

Tng quan v mng WANCng ngh Frame Relay :Tng quan :Frame Relay l cng ngh truyn dn tc cao, trong d liu c ng thnh cc frame v c truyn i trn mngFrame Relay cung cp mi trng kt ni cc mng LAN, mng Internet v cc ng dng thoi mt cch tin cy hiu quVi mt kt ni vt l, Frame Relay cung cp kh nng thit lp nhiu knh o kt ni n mt hoc nhiu v tr khc nhauC hai loi knh o: SVC (Switch Virtual Circuit) v PVC (Permanent Virtual Circuit )

Tng quan v mng WANCng ngh Frame Relay :Cc thit b dng cho kt ni Frame Relay :Thit b truy nhp mng FRAD : bridge, router LAN Thit b mng FRND : cc switch, tng i chuyn mch frame hoc cell

Tng quan v mng WANCng ngh Frame Relay :Frame Relay c mt c trng ln l cho php ngi s dng dng tc cao hn mc h ng k trong mt khong thi gian nht nhFrame Relay khng s dng th tc sa li v iu khin lu lng. Cc frame c li u b loi b. m bo cc frame i ng a ch, nguyn vn, nhanh chng s dng cc thng s trong a ch ca frame.

Tng quan v mng WANCc giao thc :Frame Relay hot ng ti hai lp ca m hnh OSILp vt l : s dng cc chun giao tip thng thng nh V35, X21bisLp datalink : giao thc LAP-F pht trin t giao thc LAPD quy nh cu trc frame d liu, cch hot ng

Tng quan v mng WANLAP-F v cu trc khung :LAP-F quy nh 2 cu trc khung :C Plane Frame dng cho qun l iu khin

U Plane Frame dng trao i thng tin ngi s dng

Tng quan v mng WAN ngha cc trng trong cu trc a ch FR :DLCI : dng nh tuyn cho cc frame, a ch dng 10 bitFECN : thng bo nghn cho pha thuBECN : thng bo nghn cho pha phtDE : nh du Frame c th b loi b

Tng quan v mng WANLMI Local Management InterfaceL chun bo hiu gia CPE v Frame Relay Switch, chu trch nhim qun l kt ni v duy tr trng thi gi cc thit b FRAD v FRNDCIR Committed information rateTc cam kt, l tc khch hng t mua v nh cung cp cam kt phi t c trong thi gian khng tc nghnCBIR Committed burst information rateKhi lng truyn tin qu ln, khch hng c php truyn vi tc CBIR> CIR trong mt khong thi gian Tc

Tng quan v mng WANCng ngh Frame Relay :u im:Tc truyn d liu cao, c th t ti a 45Mbps tr thp thch hp cho cc ng dng thi gian tht (real time)Tnh bo mt caoS dng bng thng linh hot, hiu qu caong dng :Kt ni LAN LANKt ni WANVoice over Frame Relay

Tng quan v WAN


Tng quan v mng WANGiao thc kt ni WAN trong TCP/IP giao thc PPPKhi nim : L giao thc dng ng gi d liu cho thng tin im - imL mt chun gn v qun l a ch IP, bt ng b, nh hng bit, kim tra cht lng kt ni, pht hin li

Tng quan v mng WANGiao thc kt ni WAN trong TCP/IP giao thc PPPCc thnh phn :HDLC : phng php ng gi cc khung d liu trn cc lin kt im-imLCP: thit lp, cu hnh, duy tr v kt thc kt ni point to point NCP : lp cu hnh cc giao thc tng mngNguyn tc lm vic :Gi khung LCP cu hnh, kim tra datalinkThit lp lin ktGi khung NCP chn v cu hnh cc giao thc lp mng

Tng quan v mng WANGiao thc kt ni WAN trong TCP/IP giao thc PPPYu cu lp vt l :Lm vic vi nhiu giao din DTE/DCE : EIA/TIA-232-C; EIA/TIA-422, V.35. Yu cu lp PPP link :Dng cu trc khung HDLCGiao thc iu khin LCP : gm 4 giao on Thit lp v cu hnh kt niXc nh cht lng kt niCu hnh lp mng NCPKt thc

Tng quan v WAN


Tng quan v mng WANCc thit b dng cho kt ni WAN :

Tng quan v mng WANCc thit b dng cho kt ni WAN :Router : c c interface LAN v WANChuyn mch WAN (WAN switch) hot ng ti lp 2Access server : l im tp trung cho php kt ni WAN qua PSTN, ISDN hay PDN.ISDN terminal Adaptor : l thit b u cui kt ni PC hay LAN vo mng ISDN

Tng quan v mng WANModem :n :l thit b chuyn tn hiu digital t my tnh thnh tn hiu analog truyn qua ng in thoi v ngc liChun : V42, V42BIS, X2, K56Flex, V90, V92.

Tng quan v mng WANCSU/DSU (Channel Service Unit/ Data Service Unit):n : l thit b phn cng ti u cui ca knh thu ring lm nhim v chuyn d liu trn WAN sang d liu trn Lan v ngc liChun : RS-232C, RS-449 hay V.xx

Tng quan v WAN


Tng quan v mng WANnh gi cc cng ngh dng cho kt ni WANKt ni PSTN :u im :n gin, d thc hinNhc im :tc , tin cy thpKt ni ISDN :u im : n nh hn qua PSTN,Nhc im : chi ph cao hn PSTN, khng ph binKt ni Frame Relay :u im :Nhc im :Kt ni xDSL :

Thit k WANCc m hnh WANCc m hnh an ninh mngPhn tch mt s mng WAN mu

Thit k WANCc m hnh WAN :M hnh phn cp : thng gm 3 tng :Backbone : kt ni cc trung tm mng ca tng vng (NOC)Distribution :kt ni cc POP hay nhnh mng vo NOC.Access : kt ni n ngi s dng.

Thit k WANCc m hnh WAN :M hnh cu trc : m t cu trc, cch b tr cc phn t ca WANCc thnh phn :NOC trung tm mngPOPLAN, PC u im : thit k, t chc kho st, phn tch, qun l hiu qu

Thit k WANCc m hnh an ninh mng Khi nim an ninh an ton mng:Ti nguyn cn bo v :Dch v mng ang trin khaiCc thng tin quan trng mng ang lu giCc ti nguyn phn cng v phn mm ca mngVn an ninh an ton mng khi thc hin kt nI WAN th hin : tnh bo mt, tnh ton vn, tnh sn dngVn an ninh an ton mng qua mI quan h gia ngI dng v h thng th hin bng phng thc xc thc, cho php v t chI (AAA)

Thit k WANCc kiu tn cng mng WANThm d Probe : th truy cp t xa vo mt h thng, xem xt cc thng tin ca h thngQut Scan: dng mt cng c t ng thm d tm l hng an ninh mng.Thm nhp ti khon Account Compromise : dng mt ti khon khng cho php.Thm nhp quyn qun tr - Root Compromise : vo ti khon c quyn ln nht ca h thngThu lm cc gi tin Packet sniffer : s dng chng trnh bt cc gi tin ly thng tin ti khon, mt khu T chi dch v - Denial of Service : ngn cn khng cho ngI dng hp php s dng dch v

Thit k WANM hnh an ninh mng :Xy dng m hnh an ninh an ton khi kt ni WAN : cn xc nhXc nh cn bo v ci g ?Bo v cc loi tn cng no ?Xc nh cc mi e da an ninh c thXc nh cc cng c bo m an ninhXy dng m hnh an ninh an ton

Thit k WANMt s cng c trin khai m hnh an ninh an ton mngH thng Three Part Firewall SystemH thng pht hin t nhp mngH thng pht hin l hng an ninh

Thit k WANBo mt thng tin trn mng cng ngh m hoMc ch: ngn hacker khai thc thng tin t cc gi thu c khi ang truyn trn mng -> m hoCc h m kho c chia thnh hai lp chnh :M i xng Kho m b mt : DES (Data Encryption Standard) : m ho khi d liu 64bit dng kho 56bitIDEA ( International Data Encryption Standard): s dng kho 128bit chuyn khi d liu 64bit thnh on m c di 64bitng dng : trong qun i, ngn hng, cc h thng c an ton caoKh khn : vn trao i kho thc hin trn mt knh thu ring

Thit k WANCc h m kho :H m bt i xng kho m cng khai: giI quyt kh khn ca kho quy c l s phn b kho v ch k sHot ng :Khi to h thng u cuI : to mt cp kho K1 v K2 m ho v giI m thng tin. K1 b mt, K2 cng khaiM ho v giI m thng tin : A mun gI thng tin cho B, A m ho bng kho cng khai ca B, B giI m bng kho b mt ca BCh k s : A m ho ch k bng kho b mt gI cho B, B nhn v giI m bng kho cng khai ca AChuyn I kho

Thit k WANM hnh ng dng : M hnh xy dng trn cc ng dng kt nI WANPhn tch yu cu v hiu nngPhn tch yu cu v qun l mngPhn tch cc yu cu v an ton an ninh mngPhn tch cc yu cu v ng dng

Thit k WANCc bc la chn cng ngh kt nI :Chn cng ngh kt nIXc nh nh cung cpLa chn cc thit b phn cng : La chn phn mmLa chn h iu hnh mngLa chn h qun tr c s d liuLa chn cc phng thc giao tc mngnh gi kh nng v trin khai th nghim

PHN 4 : MNG WAN & THIT K Tng quan v WANThit k mng WANPhn tch mt s WAN mu

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