Networking and Internetworking Devices

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Lecture 2 - Networking Devices

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Presentation transcript:

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

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

Connecting Devices Networking Devices Internetworking Devices Repeaters Bridges Routers Gateways

Connecting Devices Hub

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

Function of repeater Repeater is not exactly as same as Amplifier

Hub Actually is a multiport repeater Star / Tree Topology

Bridge

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

Function of a bridge

Multiport bridge

Routers

Routers in an internet

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]

Routing Principle Goal: Arriving at the destination Considerations: Direct route (shortest) Reliable route Cheap route Safe route Scenic route 

Gateways (protocol converter)

A gateway SNA network (IBM) Netware network (Novell)

Connecting Devices Networking Devices Internetworking Devices Repeaters Bridges Routers Gateways