BI THC HNH S 3HOT NG CA GIAO THC IP V

CI T CC THNG S TCP/IP CHO MY TRM Yu cu chnh v bo co thc hnh:

Bo co phi c hnh nh thc hin cc cu lnh trn ca s Command Line. Cch chp nh mn hnh nh sau:

B1 : Ca s ang m l ca s Command Prompt

B2 : Nhn t hp phm Alt + Print Scrn chp nh ca s B3 : Dng t hp phm Ctrl + V dn hnh nh vo bo co Cc sn phm bo co t vo file nn c tn nh dng TenSV_ MSSV _Lab03 Danh sch cc sn phm cn np: 1 bo co (file Word) TenSV_MSSV_Lab03.doc 1 file ip.pcapI. CI T CC THNG S TCP/IP CHO MY TRM 1. HNG DN THC HNH11. Ci t thng s1.1.1. H iu hnh Windows XP

Bc 1 : M ca s cu hnh

Chn Start/Control Panel/Network Connections/Local Area Connection

Bc 2 : Chn mc Internet Protocol (TCP/IP) trong ca s Local Area Connection

Bc 3 : Trong ca s Internet Protocol (TCP/IP) Properties c 2 la chn

Optain an IP address automatically : s dng a ch IP ng nh dch v DHCP Use the following IP address : cu hnh IP tnhChn mc Use the following IP address.

Bc 4 : in vo cc mc sau

IP address : a ch IP cho my PC

Subnet mask : mt n mng

Default gateway : a ch router mc nh Preferred DNS server : a ch ca my ch DNS th nht (208.67.222.222)

Alternate DNS server : a ch ca my ch DNS th hai (208.67.220.220)

Ch : My ch DNS cho bit a ch IP tng ng vi mt tn min

1.1.2. H iu hnh Windows Vista

Bc 1. Click Start, click chut phi ln mc "Network" v chn "Properties".

Bc 2 : Ca s "Network and Sharing Center" s c m ra, click vo "Manage network connections".

Bc 3 : Click chut phi vo biu tng kt ni mc "LAN or High-Speed Internet" v chn "Properties".

Bc 4 : Chn "Internet Protocol Version 4(TCP/IPv4)" v click "Properties". Sau bc ny, cc bc cu hnh cn li tng t trong Windows XP.

1.1.3. H iu hnh Windows 7

Bc 1 : Click Start, g "network and sharing" trn hp Search v chn "Network and Sharing Center".

Bc 2 : Click "Change adapter settings".

Bc 3 : Click chut phi ln biu tng kt ni v chn "Properties".

Bc 4 : Chn "Internet Protocol Version 4(TCP/IPv4)" v click "Properties". Sau bc ny, cc bc cu hnh cn li tng t trong Windows XP.1.2. S dng lnh ipconfig xem thng s TCP/IP1.2.1. Xem thng s a ch IP ca my tnh Xem thng s c bn: G lnh ipconfig

IP Address: a ch IP (trong v d trn l 192.168.152.128)

Subnet Mask: Mt n mng (trong v d trn l 255.255.255.0)

Default Gateway: a ch b nh tuyn mc nh (trong v d trn l 192.168.152.2)

Xem thng s y : G lnh ipconfig /all

Host Name: Tn my tnh trong mng Dhcp Enabled: Yes = S dng a ch IP ng cp pht bi dch v DHCPNo = S dng a ch IP c nh do ngi dng t Physical Address: a ch MAC IP Address: a ch IP

Subnet Mask: Mt n mng

Default Gateway: a ch b nh tuyn mc nh

DHCP Server: a ch my ch DHCP cp a ch IP ng

DNS Server: a ch my ch DNS Server

Primary WINS Server: a ch my ch WINS

Lease Obtained: Thi im bt u s dng a ch IP ng

Lease Expires: Thi im ht hn s dng a ch IP ng

1.2.2. Hy cu hnh a ch IP ngG lnh ipconfig /release

1.2.3. Yu cu cp pht a ch IP ng

G lnh ipconfig /renew

2. NI DUNG THC HNHCh : Chp nh mn hnh kt qu v chn vo bo co thc hnh. Cch chp nh mn hnh nh sau:

B1 : Ca s ang m l ca s Command Prompt

B2 : Nhn t hp phm Alt + Print Scrn chp nh ca s B3 : Dng t hp phm Ctrl + V dn hnh nh vo bo co(1) Thc hin cu hnh my tnh s dng a ch IP c cp bi dch v DHCP. S dng lnh ipconfig xem cu hnh IP ca my tnh. Hy cho bit cc thng tin sau a ch IP

(1a) Mt n mng

(1b) a ch router mc nh

(1c) a ch DNS server

a ch MAC ca cc mng

(2) S dng lnh ipconfig hy cu hnh TCP/IP hin ti. Dng lnh ny xem s thay i. Hy cho bit cc thng tin sau :

a ch IP :

Mt n mng

a ch router mc nh

a ch DNS server

a ch MAC ca cc mng

(3) Cu hnh a ch IP tnh cho my tnh nh sau:

a ch IP : 172.16.1.x

Mt n mng : 255.255.0.0

a ch router mc nh : 172.17.2.x

a ch 2 DNS server : 8.8.8.8 v 208.67.222.222

Trong x l hai ch s cui trong MSSV. V d sing vin c MSSV l 20107207 th a ch cn in l 172.16.1.7 v 172.17.2.7

S dng lnh ipconfig kim tra chc chn v s thay i cu hnh IP.

S dng lnh ping kim tra kt ni ti my ch google.com. Hy gii thch kt qu?

(4) Cu hnh a ch IP tnh cho my tnh nh sau:

a ch IP : s dng (1a)

Mt n mng : s dng (1b)

a ch router mc nh : s dng (1c)

a ch 2 DNS server : 1.1.1.1 v 2.2.2.2

S dng lnh ipconfig kim tra chc chn v s thay i cu hnh IP.

S dng lnh ping kim tra kt ni ti my ch yahoo.com. Hy gii thch kt qu?

(5) Hy cu hnh li a ch IP tnh cho my tnh da vo cc nhn xt ca (3) v (4) my tnh c th kt ni mng bnh thng. S dng lnh ping kim tra kt ni ti router mc nh, trang facebook.com, trang google.com, trang hust.edu.vn. Hy cho bit cc thng tin sau :

facebook.com

a ch IP

T l mt gi tin

Thi gian tr trung bnh

TTL

google.com

a ch IP

T l mt gi tin

Thi gian tr trung bnh

TTL

hust.edu.vn a ch IP

T l mt gi tin

Thi gian tr trung bnh

TTL

Nu lnh ping tr li cc thng bo li. Hy xem li mc thng s cu hnh(6) S dng lnh ping gi 12 gi tin, mi gi c kch thc 120 byte ti facebook.com, google.com. Hy cho bit cc thng tin sau :

facebook.com

a ch IP

T l mt gi tin

Thi gian tr trung bnh

TTL

google.com

a ch IP

T l mt gi tin

Thi gian tr trung bnh

TTL

hust.edu.vn a ch IP

T l mt gi tin

Thi gian tr trung bnh

TTL

Gi : ti du nhc lnh ca s Command Prompt g lnh sau tm hiu cch s dng

>ping /?(7) S dng lnh tracert hin th kt ni ti facebook.com v google.com. Hy cho bit cc thng tin sau:

facebook.com

a ch IP

S hop phi qua

a ch IP hop u tin

google.com

a ch IP

S hop phi qua

a ch IP hop u tin

Nhn xt g v a ch IP hop u tin? Hy th vi nhng tn min khc kim chng nhn xt.II. Hot ng ca giao thc IP thc hin ni dung ny, chng ta cn s dng phn mm PingPlotter Standard (min ph 30 ngy) ti a ch http://www.pingplotter.com/download.html.

1. Ni dung thc hin

Lu :

Bc 1: Khi ng chng trnh PingPlotter, in tn min ca mt website no vo mc Address to Trace. t gi tr # of time to trace l 1. Bc 2: Khi ng chng trnh Wireshark bt gi tin Bc 3: Trn ca s chng trnh PingPlotter, nhp nt Trace. Bc 4: i chng trnh PingPlotter thc hin n khi nt Resume xut hin. Chn mc Edit ( Options ( Packet t thanh menu, thit lp gi tr Packet size l 2000. Nhp nt OK quay li ca s chnh. Nhp nt Resume. Bc 6: Sau khi Khi nt Resume xut hin tr li, quay tr li ca s chng trnh Wireshark, dng vic bt gi tin v lu li file vi tn ip.pcap Bc 7: in gi tr sau vo b lc lc cc gi tin:(icmp || ip) && ip.addr == Dest_IP_AddressTrong Dest_IP_Address l a ch IP tng ng vi tn min ca website trn. Hnh nh sau minh ha khi chy chng trnh PingPlotter vi tn min google.com c a ch IP tng ng l 173.194.127.144

2. Cu hi(8) chn gi tin ICMP Echo request u tin v m rng phn tiu ca giao thc IP v cho bit cc thng tin sau: a ch IP my ca bn a ch IP ch Giao thc tng trn Kch thc phn tiu Kch thc phn d liu Gi tin ny c b phn mnh khng? Da vo thng tin no bit c?(9) Chn gi tin ICMP Time-to-live exceeded cho gi tin trn v cho bit cc thng tin sau: a ch IP ngun a ch IP ch Kch thc phn tiu Kch thc phn d liu ngha gi tin ny(10) Chn mt gi tin bt k c gi i t my ca bn, m rng tiu Ethernet II v cho bit: a ch MAC ngun v so snh a ch ny vi a ch MAC ca cc mng trn my ca bn a ch MAC ch l g? G lnh arp a trn ca s Command Line xem a ch IP no tng ng vi a ch MAC ny? a ch ny c trng vi a ch IP ch trn tiu Internet Protocol ca gi tin khng? Nu khng, y l a ch ca nt mng no?(11) Chn mt gi tin bt k nhn c, m rng tiu Ethernet II v cho bit:

a ch MAC ngun l g? G lnh arp a trn ca s Command Line xem a ch IP tng ng vi a ch MAC ny. a ch ny c trng vi a ch IP ngun trn tiu Internet Protocol ca gi tin khng? Nu khng, y l a ch ca nt mng no? a ch MAC ch v so snh a ch ny vi a ch MAC ca cc mng trn my ca bn

(12) Tm gi tin ICMP Echo request u tin khi thit lp Packet size l 2000 (Gi : Hy xem s thay i t ngt ca ct time bit khi no mt chui gi tin ICMP mi c gi tip theo). Da vo thng tin no bit gi tin ny b phn mnh? Gi tin ny b phn thnh bao nhiu mnh? Trng Identification ca cc mnh ging hay khc nhau? Nhng trng no trong phn tiu ca cc mnh l khc nhau?(13) Chn mnh u tin ca gi tin cu 12 v cho bit thng tin no phn tiu IP cho bit y l mnh u tin? (14) Vi mi mnh hy cho bit cc thng tin sau:STT mnh (No.)IdentificationFlagsFragment offsetKch thc phn d liu

Da vo nhng thng tin no nt ch c th thu thp cc mnh v hp cc mnh ny li?