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Session 9
Objectives:
By the end of this session, the student will be able to:
•List the reasons for interconnecting multiple LAN segments, and interconnecting LANs
and WANs
•Identify the functions and purposes of the various interconnection devices that have
been used over time
•Describe what a switch is and how it differs from other devices
•Describe the types of situations in which using a switch is advantageous
•Describe what a router is and how it differs from other devices
•Describe the types of situations in which a router is used
•Describe how circuit-switched, datagram packet-switched, and virtual circuit packetswitched networks work
•Identify the differences between a connection-oriented network and a connectionless
network, and give an example of each
Shared Segment Network
3
Dedicated Segment Network
4
Isolating Traffic Patterns & Providing Multiple
Access
5
Multiple NICs
6
Use of Bridges and Switches
7
Multiple Access
8
Full-Duplex Switch
9
Routers – Frame Translation
10
IP Addresses
11
Subnets
Subnets
A means to further break down networks
192.168.0.0 – netID
11000000.10100000.00000000.00000000
255.255.255.128 – subnet
11111111.11111111.11111111.10000000
11000000.10100000.00000000.00000000
11111111.11111111.11111111.10000000
NetID
HostIDs
Host range: 00000001 – 011111110 = 192.168.0.1 to 192.168.0.126
192.168.0.0 is reserved as the netID, 192.168.0.127 is reserved as the broadcast ID
12
WAN – Mesh Network
13
WAN – Communications Network
14
Circuit Switched Network
15
Communications Network Characteristics
16
Connection-Oriented
17
Connectionless
18