Net work

• A group of connected things .

• List 5 examples for Net work ???????

Computer Network

• A group of connected computers and other device .

• List some Devices we can add to the computer network ????

Why we need computer network ?

• Easy to communicate .

• Can work from any where .

• Easy to share information .

• Easy to share resources .

• Cheaper computer program .

• Easy to manage computers .( check and install programs from the server )

• Easier to backup files .

Drawbacks of using Computer network

• No work done if the network goes down .

• Hacking

• Network devices .

• Easier for viruses to spread .

Types of Computer Network

• LAN :

1- Local Area Network

2- small network in a small area ( house , school , office building )

3- need switch .

Types of Computer Network

• WAN :

1- Wide Area Network

2- network connecting LANs over a large geographical area .

3- need Router .

The Internet

• A global network of networks ( the largest WAN )

At Home

At School

At Work

Type of computer network used ( LAN , WAN , the Internet , All ) ? Why ?

Network Topology

• A star topology is a topology for a Local Area Network(LAN) in which all nodes are individually connected to a central connection point, like a hub or a switch.

Network Topology

• A ring network is a network topology in which each node connects to exactly two other nodes, forming a single continuous pathway for signals through each node - a ring. Data travels from node to node, with each node along the way handling every packet.

Network Topology

• A bus network is a network topology in which nodes are directly connected to a common linear (or branched) half-duplex link called a bus .

Star Ring Bus