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