Lesson 2: Computer Network Concepts

Computer Network

Defined as a group of computers and other similar network devices linked/connected that enables them to communicate and share resource, files, and applications.

Benefits of Sharing Information Using Network

a. Files, data, and software can be shared and accessed by various users.

b. Electronic mail (e-mail) can be sent and received on the internet.

c. There are multiple users that can collaborate with a single file.

d. Troubleshooting problems can be given to new users or how to perform a task through remote-control programs.

PAN, LAN, CAN, MAN, WAN

Types of computer networks

Personal Area Network (PAN)

Used for communication among computer devices in proximity to an individuals body or within a few meters within a room.

Local Area Network (LAN)

Confined to a relatively small area. Generally limited to a geographic area (writing lab, school, or building). These are rarely more than a mile apart.

Campus Area Network (CAN)

Made up of interconnections of local area networks (LANs) within a limited geographical area.

Metropolitan Area Network (MAN)

Is a hybrid between a LAN and a WAN. Connects two or more LANs in the same geographic area. Might connect two different building or offices in the same city/municipality.

Wide Area Network (WAN)

Covers a broad area (communications link across metropolitan, regional, or national boundaries).

Transoceanic Cabling and Satellite Uplinks

Are used to connect Wide Area Network (WAN).