1. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Chapter Ten Internetworking

2. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Example of a internetwork path that a message may follow Figure 10.1

3. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Integration scenario between an intranet and the Internet Figure 10.2

4. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Relationship between intranets, extranets, and the Internet Figure 10.3

5. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Applications of network interconnection devices Figure 10.4

6. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Switches or routers can interconnect heterogeneous LANs Figure 10.5

7. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. A switch interconnecting different Ethernet LAN types Figure 10.6

8. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Simple representations of an IPv4 address Figure 10.7

9. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Example of IP address assignments for two Ethernet LANs connected by routers through the Internet Figure 10.8

10. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Example of the hierarchical naming structure used by DNS Figure 10.9

11. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Construction of an e-mail address Figure 10.10

12. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Frame forwarding function of a bridge Figure 10.11

13. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. A local bridge can segment and connect LANs Figure 10.12

14. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. A transparent bridge connects similar LANs Figure 10.13

15. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Operational concept of a transparent bridge Figure 10.14

16. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Creation of forwarding tables for two transparent bridges Figure 10.15

17. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Format of a route discovery frame Figure 10.16

18. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. A translating bridge connecting two dissimilar LANs Figure 10.17

19. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Implementation of various types of routers Figure 10.18

20. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Concept of a router acting as the interface between a corporate intranet, an extranet, and the Internet Figure 10.19

21. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Routers operate at the network layer Figure 10.20

22. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. LAN switches can isolate stations from other network users Figure 10.21

23. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Basic concept of a generic switch Figure 10.22

24. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Layer-3 switch replacing two layer-2 LAN switches + a router Figure 10.23

25. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Example of a policy-based enterprise backbone network Figure 10.24

26. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. VLANs for 3 separate departments across an ATM backbone Figure 10.25

27. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Two port-grouped VLANs in an eight-port switch Figure 10.26

28. Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Two IP-based virtual LANs in a six-port switch Figure 10.27