basic network

network

What is NETWORK ??

Network is a collection of of computers and devices connected together via communication devices and transmission media .

Usually , the connections between computers in a network are made using physical wires or cables .

Applications of Network 

1. Resource Sharing
2. Information Sharing
3. Communication

NETWORK ARCHITECTURE

Network Architecture is the configuration of computers , devices , and media on a network .

Categories of network architecture:

• Client/Server Network 
• Peer-to-Peer network

NETWORK TOPOLOGY

A network topology refers to the layout of the computers and devices in a communications network .

It refers to both the physical and logical layout of a network .

• Physical Topology - the physical layout of nodes , workststions and cables in the network .
• Logical Topology  - The path that data travels between computers on a network .

Types of network topology

• Bus Network Topology - A bus network consists of a single central cable (backbone) , to which all computers and other devices connect .

     

• Star Network Topology - All the computers and devices (nodes)on the network connect to a central devices , thus forming a star.

• Ring Network Topology - On a ring network , a cable forms a closed loop (ring) with all computers and devices arranged along the ring .

 CLASSIFICATION OF NETWORK 

1. Local Area Network ( LAN ) : A local area network (LAN) is a network that connects computers and devices in a limited geographical area .

        2. Metropolitan Area Network ( MAN ) : A metropolitan area network (MAN) is a high-speed network that             connects local area networks in a metropolitan area .

       3. Wide Area Network  ( WAN ) : A wide area network (WAN) is a network that covers a large geographic              area (such as city , country , or the world ) using a variety of wired and wireless transmission media .