Data Link Control Line Discipline Flow Control Error Control

Functions of Data Link Layer Functions of Data Link Layer Figure 10-1

Figure 10-2

Figure 10-3

ENQ/ACK Figure 10-4

Figure 10-5 ENQ/ACK

Multipoint Discipline Figure 10-6

Select Figure 10-7

Poll Figure 10-8

Figure 10-9 Flow control – set of procedures that tells the sender how much data it can transmit before it must wait for an acknowledgement from the receiver

Stop and Wait Figure 10-10

Sliding Window Figure 10-11

Figure Sender Sliding Window

Figure Receiver Sliding Window

Figure Sliding Window Example

Figure continued Sender

Figure continued Receiver

Figure 10-15

Damaged Frame Figure 10-16

Lost Frame Figure 10-17

Lost ACK Figure 10-18

Damaged Frame Figure 10-19

Lost Frame Figure 10-20

Lost ACK Figure 10-21

Selective Reject Figure 10-22

Reference Data Communications and Networking, 2 nd ed. by Behrouz A. Forouzan