In this lecture my openion ....

In this lecture my openion ....

 I Like this lecture because the means of educational assistance to help deliver information intended to students. And also choose a suitable means to facilitate the speed of information and consolidate understanding in the minds of students.

click here:

http://www.arab4load.info/downloadf-d8db1353790039171-ppt.html

Ring topology:

Ring topology:

In this type each computer is connected to the next computer with the last one connected to the first. Each retransmits what it receives from the previous computer. The message flows around the ring in one direction. The ring network does not subject to signal loss problem as a bus network experiences. There is no termination  .because there is no end to the ring

star Topology:

star Topology:

In this kind of topology all the cables run from the computers to the central location where they are all connected by a device called hub or switch. Each computer on a star network communicates with a central device that resends the message either to each computer or only to the destination computer, e.g. if it is a hub then it will send to all and if it is a switch then it will send to only destination computer.When network expansion is expected and when the greater reliability is needed, star topology is the best.

Bus Topology:

Bus Topology:

 It is often used when network installation is small, simple or temporary. On a typical bus network the cable is just 1 or more wires with no active electronics to amplify the signal or pass it along from computer to computer. This makes the bus a passive topology. When 1 computer send a signal up the wire all the computers receive the information but only one with the address that matches accepts the information, the rest disregard the message.

The disadvantages(costs) of network:

The disadvantages(costs) of network:

• Network Hardware, Software and Setup Costs
• Hardware and Software Management and Administration Costs
• Undesirable Sharing
• Illegal or Undesirable Behavior
• Data Security Concerns

The advantages (benefits) of network:

The advantages (benefits) of network:

• Connectivity and Communication
• Data Sharing
• Hardware Sharing
• Internet Access
• Internet Access Sharing
• Data Security and Management
• Performance Enhancement and Balancing
• Entertainment

Welcome to my blogger

What is a Network?

A computer network is simply two or more computers connected together so they can exchange information. A small network can be as simple as two computers linked together by a single cable.