18 OSI







8-1



8-2 OSI






8-3





8-4

01

8-5 NRZ

1

8-6

code group
© 2009 (Pearson Education Taiwan)








8-2


8-10





8-3








UTP


8-12 RJ-45

8-13 RJ-45568A568B

8-4 UTP

STP

8-14

8-15






© 2009 (Pearson Education Taiwan)

8-17

LED
8-18

8-5

© 2009 (Pearson Education Taiwan)

8-6 LAN802.11


8-19 RJ-45

8-20



OSI

throughput
goodput
bandwidth