| A | B |
|---|
| ring | a ring topology connects ine host to the next and the host to the first. this creates a physical ring of cable |
| mesh | a mesh topology is used when there can be absolutely no break in communications, for example the control systems of a nuclear power plant. so as you can see in the graphic, each host has its own connctions to all other hosts. this also reflects the design of the internet which has multiple paths to any one location |
| star | a star topology connects all cables to a central point of concentration. this point is usually a hub or switch, which will be described later in the chapter. |
| extended star | an extended star toplogy uses the star topology to be created. it links individual stars together by linking the hubs/switches. |
| bus | a bus topolgy uses a single backbone segment(length of cable)that all the hosts connect to directly |
| hierarchical | a hierachical topolgy is created similar to an extended star but instead of linking the hubs/switches together, the system is linked toa computer that controls the traffic on the topolgy |
| logical-token | the logical topolgy of a network is how the hosts communcate across the medium. |
| log-braodcast | broadcast topolgy simply means that each host sends its data to all other hosts on the network medium. |
| repeater | regenerate and retime network signals |
| hubs | regenerate andretime network signals just like a repeater but it can do alot at a time (multiport repeater) |
| media | materials through which transmission pass |
| NIC | network interface card |
| switch | a switch is a llayer device just as a bidge is. its called a mutli port bridge, |
| router | the purpose of a router is to examince incoming packets ( layer 3 data) choose the best path for them through the network, and then switch them to the proper outgoing port, |
| bridge | a layer 2 designed to connect two lan segments, the purpose of a bidge is to filter raffic ona lan to keep local traffic local, yet allow connectivity to other parts(segments)of the lan for traffic that has been directed there. |
| cloud | the cloud symbol suggests another network, perhaps the entire internet. it reminds us that there is a way to connect to that other network( the internet) but does not supply all the details of connection, or of that network |
