1. Networking and Internetworking Devices ดร. อนันต์ ผลเพิ่ม Anan Phonphoem, Ph.D. anan@cpe.ku.ac.th http://www.cpe.ku.ac.th/~anan Computer Engineering Department Kasetsart University, Bangkok, Thailand

2. 2/ 25 Outline Network Devices Repeater/Hub/Bridge/Router/Gateway Backbone Network Bus/Star/VLAN

3. Connecting Devices Networking Devices RepeatersBridges Internetworking Devices RoutersGateways

4. 4/ 25 Connecting Devices Hub

5. 5/ 25 Repeater Extend the physical length No network function has been changed Location is matter

6. 6/ 25 Function of repeater Repeater is not exactly as same as Amplifier

7. 7/ 25 Hub Actually is a multiport repeater Star / Tree Topology

8. 8/ 25 Bridge

9. 9/ 25 Bridge Divide a large network into smaller segment Isolating and controlling the link problems (e.g. congestion) Regenerate signal + Checking Physical Address and forward only to the specified segment

10. 10/ 25 Function of a bridge

11. 11/ 25 Multiport bridge

12. 12/ 25 Routers

13. 13/ 25 Routers in an internet

14. 14/ 25 Routers Act like stations on a network Multi-home Definition (Goal) “ Learning how to get from here to there." “ Process of discovering, selecting, and employing paths from one place to another (or to many others) in a network ” [from David M. Piscitello, Bellcore and A. Lyman Chapin, BBN]

15. 15/ 25 Routing Principle Goal: Arriving at the destination Considerations: Direct route (shortest) Reliable route Cheap route Safe route Scenic route

16. 16/ 25 Gateways (protocol converter)

17. 17/ 25 A gateway SNA network (IBM) Netware network (Novell)

18. Connecting Devices Networking Devices RepeatersBridges Internetworking Devices RoutersGateways

19. 19/ 25 Other devices Multiprotocol routers Brouters Switches Routing switches

20. 20/ 25 Single VS. Multiprotocol router

21. 21/ 25 Brouter

22. 22/ 25 Backbone Network Bus Backbone Star Backbone

23. 23/ 25 Connecting Remote LAN A point-to-point link acts as a LAN in a remote backbone connected by remote bridges

24. 24/ 25 Virtual LAN (VLAN) VLANs create broadcast domains

25. 25/ 25 VLAN with backbone switch