Networking Devices

Networking and Internetworking Devices

ดร. อนั�นัต์� ผลเพิ่ �มAnan Phonphoem, Ph.D.

anan@cpe.ku.ac.th

http://www.cpe.ku.ac.th/~anan

Computer Engineering Department

Kasetsart University, Bangkok, Thailand

2/ 25

Outline Network Devices

Repeater/Hub/Bridge/Router/Gateway Backbone Network

Bus/Star/VLAN

Connecting Devices

Networking Devices

Repeaters Bridges

InternetworkingDevices

Routers Gateways

4/ 25

Connecting Devices

Hub

5/ 25

Repeater

• Extend the physical length• No network function has been changed• Location is matter

6/ 25

Function of repeater

Repeater is not exactly as same as Amplifier

7/ 25

Hub

• Actually is a multiport repeater• Star / Tree Topology

8/ 25

Bridge

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/ 25

Function of a bridge

11/ 25

Multiport bridge

12/ 25

Routers

13/ 25

Routers in an internet

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/ 25

Routing Principle Goal: Arriving at the

destination Considerations:

Direct route (shortest) Reliable route Cheap route Safe route Scenic route

16/ 25

Gateways (protocol converter)

17/ 25

A gateway

SNA network (IBM)Netware network (Novell)

Connecting Devices

Networking Devices

Repeaters Bridges

InternetworkingDevices

Routers Gateways

19/ 25

Other devices Multiprotocol routers Brouters Switches Routing switches

20/ 25

Single VS. Multiprotocol router

21/ 25

Brouter

22/ 25

Backbone Network

Bus Backbone

Star Backbone

23/ 25

Connecting Remote LAN

A point-to-point link acts as a LAN in a remote backbone connected by remote bridges

24/ 25

Virtual LAN (VLAN)

VLANs create broadcast domains

25/ 25

VLAN with backbone switch