COMPUTER NETWORK

Two or more autonomous computing devices connected to one another in order to exchange information or share resources , from a computer network. "A computer network is a collection of interconnected autonomous computing devices so as to exchange information or share resoures."

Advantages of Network

• share resouces:- share a file or any documents .
• share storage :- able to access file from internet.
• can share software :- software can be installed and share , maintain who main copys.
• improve communications :- communicate with anone and any whare

Disadvantages of Network

• complex to run
• File securing is more importent

Components of computer network

• Hosts/Nodes(such as nic, router, switch, hub etc.)
• Servers
• Clients
• Network hardware(such ar router, NIC, sitch, hub etc)
• Communication channel (cables, radio-links, satellite etc.)
• software | Protocols
• Network Services (file sharing, video calling tec.)

Network Topology

• Star topology
• Bus or linear topology
• Ring or circular topology
• Tree topology
• Mesh topology
• Hybrid topology

Modem (Modulator-demodulator)

• AM(amplitude modulator
• FM(frequency modulator
• PM(phase modulation)

Network devices

• Hub
• Switch
• Repeater
• Bride
• Router
• Gateway