1. COMON NETWORK STRUCTURES BY :Karla Barragán

2. STAR topology Star networks are one of the most common computer network topologies. In its simplest form, a star network consists of one central switch, hub or computer, which acts as a conduit to transmit messages.

3. The star topology has the form of a star, thats why it Gots its name, in the center it has a switch that sends signal to all the computers conected to it. When a conection is interferenced, it doesn`t affects the other conection.

4. BUS topology A bus network uses a multi-drop transmission medium, all node on the network share a common bus and thus share communication. This allows only one device to transmit at a time. A distributed access protocol determines which station is to transmit. Data frames contain source and destination addresses, where each station monitors the bus and copies frames addressed to itself.

5. A bus topology connects each computer (nodes) to a single segment trunk (a communication line, typically coax cable, that is referred to as the 'bus'. The signal travels from one end of the bus to the other. A terminator is required at each to absorb the signal so as it does not reflect back across the bus

6. Ring topology Also known as a ring network, the ring topology is a type of computer network configuration where each network computer and device are connected to each other forming a large circle (or similar shape). Each packet is sent around the ring until it reaches its final destination. Today, the ring topology is seldom used.

7. The ring topology is rarely used in now days. When one conection is Interferenced, all the conection are affected.

8. Bibliography: http://homepages.uel.ac.uk/u01167 71/bus_topology.htm http://en.wikipedia.org/wiki/Star_net work http://www.computerhope.com/jar gon/r/ringtopo.htm