1. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Local Area Networks Gerd Keiser

2. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Chapter Ten Internetworking

3. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Example of a internetwork path that a message may follow Figure 10.1

4. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Integration scenario between an intranet and the Internet Figure 10.2

5. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Relationship between intranets, extranets, and the Internet Figure 10.3

6. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Applications of network interconnection devices Figure 10.4

7. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Switches or routers can interconnect heterogeneous LANs Figure 10.5

8. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl A switch interconnecting different Ethernet LAN types Figure 10.6

9. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Simple representations of an IPv4 address Figure 10.7

10. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Example of IP address assignments for two Ethernet LANs connected by routers through the Internet Figure 10.8

11. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Example of the hierarchical naming structure used by DNS Figure 10.9

12. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Construction of an e-mail address Figure 10.10

13. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Frame forwarding function of a bridge Figure 10.11

14. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl A local bridge can segment and connect LANs Figure 10.12

15. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl A transparent bridge connects similar LANs Figure 10.13

16. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Operational concept of a transparent bridge Figure 10.14

17. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Creation of forwarding tables for two transparent bridges Figure 10.15

18. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Format of a route discovery frame Figure 10.16

19. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl A translating bridge connecting two dissimilar LANs Figure 10.17

20. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Implementation of various types of routers Figure 10.18

21. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Concept of a router acting as the interface between a corporate intranet, an extranet, and the Internet Figure 10.19

22. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Routers operate at the network layer Figure 10.20

23. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl LAN switches can isolate stations from other network users Figure 10.21

24. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Basic concept of a generic switch Figure 10.22

25. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Layer-3 switch replacing two layer-2 LAN switches + a router Figure 10.23

26. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Example of a policy-based enterprise backbone network Figure 10.24

27. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl VLANs for 3 separate departments across an ATM backbone Figure 10.25

28. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Two port-grouped VLANs in an eight-port switch Figure 10.26

29. “Local Area Networks” - Gerd Keiser Copyright © 2003 - The McGraw-Hill Companies srl Two IP-based virtual LANs in a six-port switch Figure 10.27