COMPUTER NETWORK

A   DIAGRAMMATICALLY  OF  COMPUTER NETWORK

NETWORK

Networks are systems that are formed by links. 

Computer network:  Is the connection of two or more computer to the purpose of sharing resource. Resource can be hardware or software.

COMPUTER NETWORK CATEGORIES

A.      LAN’s (LOCAL ARE NETWORK)

Traditionally, a LAN is defined as a network that encompasses a small geographical area. However, the distinguishing characteristic for LAN's today is that they are typically owned by an individual, such as in a home or small business, or wholly managed by an IT department, such as in a school or corporation. This individual or group enforces the security and access control policies of the network.

A computer network is identified by the following specific characteristics:

·         Size of the area covered

·         Number of users connected

·         Number and types of services available

·         Area of responsibility

B. MAN’s (METROPOLITAN NETWORK)

A metropolitan area network (MAN) is a network that spans across a large campus or a city. The network consists of various buildings interconnected through wireless or fiber optic backbones. The communication links and equipment are typically owned by a consortium of users, or by a network service provider who sells the service to the users. A MAN can act as a high-speed network to enable sharing of regional resources.

A.   WAN's (WIDE AREA NETWORK)

A WAN connects multiple networks that are in geographically separated locations. The distinguishing characteristic of a WAN is that it is owned by a service provider. Individuals and organizations contract for WAN services. The most common example of a WAN is the Internet. The Internet is a large WAN that is composed of millions of interconnected networks. In the figure, the Tokyo and Moscow networks are connected through the Internet.

WEB SITE

WEBSITE: Is electronic representation of organization.  Or

WEBSITE: Is collection of electronic page that display organization pages

Website divided into two types

        I.            Static website: Is collection of data which do not change.

Advantages of static websites

§  Quick to develop

§  Cheap to develop

§  Cheap to host

Disadvantages of static websites

§  Requires web development expertise to update site

§  Site not as useful for the user

§  Content can get stagnant

    II.        Dynamic web site: Is collection of data which change.

Advantages of dynamic websites

§  Much more functional website

§  Much easier to update

§  New content brings people back to the site and helps in the search engines

§  Can work as a system to allow staff or users to collaborate

Disadvantages of dynamic websites

§  Slower / more expensive to develop

§  Hosting costs a little more

REQUISITE/ REQUIREMENT OF GOOD NETWORK

a.       Domain name and registration

b.      Web host

c.       Web/ blog design