1. 3 rd lecture Presented by Dr. Sarah Mustafa Eljack

2.  Network topology is the study of the arrangement or mapping of the elements (links, nodes, etc.) of a network, especially the physical (real) and logical (virtual) interconnections between nodes 2

3.  Point-to-point  Bus  Star  Ring  Mesh  Tree 3

4.  All of the nodes of the network are connected to a common transmission medium  All data that is transmitted between nodes in the network is transmitted over this common transmission medium and is able to be received by all nodes in the network virtually simultaneously 4

5.  Each of the nodes of the network is connected to a central node with a point-to-point link  All data that is transmitted between nodes in the network is transmitted to this central node, which is usually some type of device that then retransmits the data to some or all of the other nodes in the network  5

6.  Each of the nodes of the network is connected to two other nodes in the network  The first and last nodes is connected to each other, which forms a ring 6

7.  All data that is transmitted between nodes in the network travels from one node to the next node in a circular manner and the data generally flows in a single direction only.

8.  Fully connected  Each of the nodes of the network is connected to each of the other nodes in the network with a point-to-point link  this makes it possible for data to be simultaneously transmitted from any single node to all of the other nodes. . 8

9.  Partially connected  Some of the nodes of the network are connected to more than one other node in the network with a point-to-point link  this makes it possible to take advantage of some of the redundancy that is provided by a physical fully connected mesh topology without the expense and complexity required for a connection between every node in the network.

10. CBK REVIEW - August 1999