Part 1 Chapter 2 (Fund Of Eth Lans)

Front 1

802.3

Back 1

Ieee ethernet standard

Front 2

UTP

Back 2

Unshielded twisted pair

Front 3

Crosstalk

Back 3

EMI between wire pairs in the same cable

Front 4

Straight through pinout (transmitters/recievers)

Back 4

1/2, 3/6

Front 5

Crossover cables (when to use and pinouts)

Back 5

Use for same types of nodes because they both transmit and recieve on the same pins

1->3, 2->6, 3->1, 6->2

Front 6

Devices that transmit on pins 1 and 2

Back 6

Pc nics, routers, wireless access point (ethernet interface)

Front 7

Devices that transmit on pins 3 and 6

Back 7

Hubs and switches

Front 8

1000BASE-T pinning

Back 8

1->1, 2->2, etc all the way to 8

Crossover: switch 1/2, 3/6, 4/5, 7/8

Front 9

OUI

Back 9

Organizationally unique identifier

First 24 bits (3 bytes, 6 hex digits, half) of a mac address

Front 10

Broadcast vs multicast address

Back 10

Broadcast sends frames to all addresses on the LAN, multicast sends to a specific subset that has volunteered to receive them by the multicast address

Front 11

FCS

Back 11

Frame check sequence (error detection by hash in ethernet frame trailer)

Front 12

Half duplex vs full duplex NICs

Back 12

Half duplex can only send or recieve at any given time, but full duplex can both send and recieve simultaneously

Front 13

CSMA/CD

Back 13

Half duplex algorithm that listens to see if the Ethernet is busy, then sends a frame. It then listens to see if a collision has occurred, and if itnhas it sends a jamming signal and each node that send a colliding frame waits a random amount of time before starting over again.