Skip to main content

Wide-Area Network

Wide-Area Network is a Network of Computers spread across cities,  countries, continents, and the world. The Network is present over a wide area indeed.

WAN can be thought to be an information system. This information system is based on Computers. These Computers are somehow connected.

A LAN ( Local Area Network ) may be connected on WAN ( Wide-Area Network). LANs are marked by Personal Computers ( PCs ) or microcomputers. These Personal Computers ( PCs ) become a part of WAN.

Mainframe Computers may also be connected on WAN. WAN supports Mainframe Computers as well.

WAN Computers use communication media to connect with each other. Communication media is used to share information. Communication media supported by WAN are:

A ) Lines or Trunks 

B ) Satellites 

C) Microwave

D) Medium and Long Range Radio Waves

WAN communication takes time. Information travels from one Computer to another. There is some delay in this communication process. It is natural because such activity starts, continues, and stops. So, we can see that there is something that is done and we can call it transportation of information. Transport service  cannot be completed without consumption of  time.

WAN may use dedicated communication lines.These lines serve to link and help the WAN Computers in the communication process. Data is sent over such lines. The path of communication is reserved. For the entire  communication process the lines are active to support data communication.

WAN may use communication lines that are set up for a certain time. Communication process is completed using these lines. WAN Computers participate in communication and share information. The set up lines are temporary indeed. When no longer needed they cannot be said to form a connection. The communication lines are broken, we can say. When needed, the lines are set up.

Labels:

Comments

Post a Comment

Popular posts from this blog

Local-Area Networks

Local-Area Networks ( LANs ) are restricted to a small area. Such Networks may be established within a building. Computers that are part of Local-Area Networks are Personal Computers ( PCs ) or microcomputers. These Computers are connected to each other. Simple communication lines connect these Pers Networks bring people together. When people join  hands teamwork becomes possible. The structural composition of LANs simplifies teamwork. In other words, LAN hardware supports teams having similar processing requirements. LAN Computers readily support personalization of tasks allocated to professionals.  Office staff can work together and share information. This improves the efficiency of the entire workforce. It has been noted that here all the Networked Computers are Personal Computers. They are of equal capacity. Mostly LAN users have similar tasks. If situations allow, a user is independent to access any Computer to serve his purpose. LAN users can exercise the option of secu...
Post a Comment
Read more

Computers - An Introduction

Computers are man made machines. They are made to work very fast. Working fast they can solve  big and small problems.  Modern science has given us these computers. They are very popular. Computers affect and change lives. They keep us happy.The happiness grows. Computers are quick and smart. Great problem solvers and simplifiers are our computers. They can do our work without stopping. Focus is on doing only what is needed. Not needed, not done.  Computers are  life-less servants. They cannot think or make decisions on their own. They are empowered to work. They are given each and every thing so that they carry out our orders. Orders are respected by computers. The manner in which computers work is wholly dependent on man.  The quality of service provided by computers is remarkable. They are loved by human beings. Computers are known for smart and quick service. Computers do not give wrong results. Correct answers are always given. Questions which are difficult...
Post a Comment
Read more

Euclid's Algorithm

The Greatest Common Divisor ( GCD ) of  two numbers is a number. The number ( GCD ) causes division of the two numbers. This number ( GCD ) is the greatest number that is possible. This divisor partially forms the two numbers. Adding  the divisor successively may result in formation of the two numbers. One can note that when the divisor is the greatest, the division of the dividend is the sharpest. The division operation is very effective. When the Greatest Common Divisor of two numbers is considered, we think of a number that can cause division of both the numbers. Here the two numbers are unequal. The Greatest Common Divisor causes divisions of the two numbers differently. This is clear from the two different quotient values.  The GCD value is very interesting to note. It relates very well with the two numbers. The GCD of two even numbers is also an even number. The GCD of two odd numbers is an odd number. So, we can say that GCD is an abstraction of the two numbers in ...
1 comment
Read more