Computer Systems Servicing - Computer Network Concepts

Lesson 1: Computer Network Concepts

After going through this lesson, you are expected to:

1. Identify the different types of computer networks.

2. Value the importance of computer networks.

A computer network is a group of computers linked to each other that enables the computer to communicate with another computer and share its resources, data, and applications. The most common resource shared today is connection to the Internet. Other shared resources can include a printer or a file server. The internet itself can be considered a computer network. Network devices connect a collection of hosts on a computer network. Any device that sends or receives information in the network is counted as host. Devices that are connected to the host such as printers, scanner and the like are called peripherals. Numerous devices could be connected to the network.

Benefits of Computer Networking

1. Fewer peripherals are required

Multiple computers or hosts are able to access peripherals such as printers or a scanner which reduces the need to have a single peripheral host.

2. Increased communication capabilities

Different collaboration tools are provided by the network for communication between users.

3. Prevention of file duplication and corruption

A server manages the network resources, stores data in centralized storage, and shares data with users who are permitted to access data. A document tracking software may be used to prevent users from making changes to files that are currently accessed by other users or from overwriting files.

4. Lower-cost licensing

Purchasing an application license for every computer on the network may be costly. Numerous software vendors offer licensing for networks thus enabling all the users on the network to use the application for a single fee.

5. Centralized administration

Reduces the amount of manpower required to manage data on the network therefore reducing time and cost for the company. A single administrator could control the devices, data, and restrictions of the users on the network. A centralized data storage location would make it easier to back up data as well.

6. Resource conservation

In order to prevent a single host from being overloaded with processor tasks, data processing may be distributed across multiple hosts on a network.