Science Computer Chapter 2.0 by B1T3 Nurul Atikah

What is network?

t1t4nurulatikah — 2020-10-05 15:18:27 UTC

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

What is Communication?

t1t4nurulatikah — 2020-10-05 15:23:33 UTC

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

Communication Device

t1t4nurulatikah — 2020-10-05 15:29:21 UTC

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

Transmission Media

t1t4nurulatikah — 2020-10-05 15:37:04 UTC

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

Advantages of Network

t1t4nurulatikah — 2020-10-05 15:43:05 UTC

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.

Disadvantage of Network

t1t4nurulatikah — 2020-10-05 15:50:47 UTC

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

What is network architecture?

t1t4nurulatikah — 2020-10-05 15:58:53 UTC

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

Type: Peer-to-Peer

t1t4nurulatikah — 2020-10-05 16:01:05 UTC

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

Advantages/Disadvantages

t1t4nurulatikah — 2020-10-05 16:05:30 UTC

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

Type: Client/Server

t1t4nurulatikah — 2020-10-05 16:08:39 UTC

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

Advantages/Disadvantages

t1t4nurulatikah — 2020-10-05 16:14:06 UTC

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.

Local Area Network (LAN)

t1t4nurulatikah — 2020-10-18 14:59:25 UTC

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

Wide Area Network (WAN)

t1t4nurulatikah — 2020-10-18 15:27:23 UTC

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