CS610 Midterm Short Notes

CS610 Short Notes Mid term · Lec 1 to22 · Website Link:

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Lecture No. 1

Network

System for connecting computers using a single transmission technology

Internet

Set of networks connected by routers that are configured to pass traffic among any computers attached to any network in the set.

CLASSIFICATION OF NETWORKS

Computer networks are classified by four factors which are as follow:

•  BY SIZE:
•  BY CONNECTIVITY:
•  BY MEDIUM:

1. BY SIZE: According to their size there are two classifications of networks. I. Local Area Network. ( LAN) II. Wide Area Network (WAN)

Local Area Network. (LAN)

In LAN network occupies the smaller area like a room a floor or a building.

Wide Area Network (WAN)

In WAN, network occupies larger areas like cities & countries. Internet is a Wide Area Network.

2) BY CONNECTIVITY: Networks are also classified by connectivity in which two topologies are discussed. I. II. Broadcast

Point-to-Point topologies there are two topologies.

1. STAR topology
2. TREE topology

STAR topology

In star topology each computer is connected to a central hub. The communication takes place through the hub.

TREE topology

In Tree topology all computers are connected to each other in such a way that they make a tree.

BROADCAST:

In broadcast topology there are further two categories

1. SATELLITE\RADIO
2. RING TOPOLOGY

SATELLITE\RADIO

In a satellite or radio topology all computers are connected to each other via satellite or radio wave.