Chapter 6

Question 1

Flow Control

Answer 1

Pacing between adjacent sending and receiving nodes.

Question 2

Error Detection

Answer 2

Errors caused by signal attenuation, noise. Receiver detects errors, signals retransmission, or drops frame.

Question 3

Error Correction

Answer 3

Receiver identified and corrects bit error(s) without retransmission.

Question 4

Multiple Access Protocol

Answer 4

Distributed algorithm that determines how nodes share channel. Communication about channel sharing must use the channel itself.

Question 5

Channel Partitioning

Answer 5

Divide channel into smaller “pieces”, allocate piece to node.

Question 6

Random Access

Answer 6

Channel not divided, allow collisions, recover from collisions.

Question 7

“Taking Turns”

Answer 7

Nodes take turns, but nodes with more the send take longer.

Question 8

Pooling

Answer 8

Centralized controller uses pooling messages to “invite” client nodes to transmit in turn.

Question 9

Token Passign

Answer 9

Control token message explicitly passed from one node to another node next, sequentially.