1. Chapter 10 Data Link Control Line Discipline Flow Control Error Control WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

2. Data Link Layer Figure 10-1 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

3. Figure 10-2 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

4. Figure 10-3 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

5. ENQ/ACK Figure 10-4 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

6. Figure 10-5 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998 ENQ/ACK

7. Multipoint Discipline Figure 10-6 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

8. Select Figure 10-7 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998

9. Poll Figure 10-8 WCB/McGraw-Hill  The McGraw-Hill Companies, Inc., 1998