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A collection of computer and devices connected together via communication device and transmission media to share resources.

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Process where two or more computers or devices transfer data, instruction & information.

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Routers : connects multiple computers together and transmit data to its correct destination.
Hub  and Switch : provides central point for cables in a network.

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materials/substances capable of carrying one/more signals

Wired:
1) Twisted pair cable
2) Fiber optic cable

Wireless:
1)Broadcast radio
2) Microwaves
3) Communication satellite

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1) Facilitating communications by making communications more efficient
2) Easy in sharing data and information as any authorized user can access stored data and information on a network.
3) Easy in transferring fund as Electronic Funds Transfer (EFT) allows users connected on a network to exchange money with different accounts.

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1) Easily exposed to virus attacks because computers connected to network
2) Slow network once more users use the same network
3) High cost for maintenance

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Configuration/designs of computers, device and media on a network.

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Each computer(peer) have equal responsibilities and capabilities on sharing hardware, data or information.
Suitable for small network (<10 computers)

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Computer Geek HQ - Computer Networking Basics Peer-to-Peer

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Advantages:
-easy and inexpensive to set up
-more reliable, failing of one peer will not affect others.
-all peers can share resources

Disadvantages:
-Lack security and management control
-Data recovery and backup is

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One/more computer act as a server and other computers request services from the server.
Client: computers that rely on the server for its resources.
Server: controls access and provides a centralized storage area

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Advantages:
-centralized control by the server promotes better security and management
-Data backup and recovery is easier as they are stored in server

Disadvantages:
-High cost to set up and maintain
-Less reliable because depend on the server
-Network congestion when too many clients request services at the same time.

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Area of Network
-Connects computers and devices in a limited geographical area
-wireless LAN (WLAN) uses no physical wires

Connectivity
-Computers are located in the same building, usually through wires

Ownership
-controlled by a single person or organization

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Area of Coverage
-Covers large geographic area using variety of wired and wireless transmission media
-One large network or multiple LAN connected together
-Internet is the largest WAN

Connectivity
-Computers connected via satellite or Internet

Ownership
-Collective ownership and management over long distances/ no ownership/ public