1) Logical topology is a configuration that is based on how data is implemented.
Physical topology is the actual connection or physical connection of the network.
2) Ethernet CSMA/CD is where the host computer waits and listens for traffic, and when the host dosn't hear traffic it thens transmits. But if the host transmits and another host transmits at the same time a collision of data occurs and the data is lost. When a collision occurs all the host on the subnet stops transmitting and waits a calculated amount of time, and then starts the process over.
The biggest difference is the speed at which the Ethernet LAN is capable of operating.
The next biggest difference is the maxium distance of wire can be used before a hub must be used.
Finally the type of equipment being used (e.g. NICs, switches).
Palo Alto Research Center(PARC) Xerox Corperation in 1972 by Bob Metcalfe and his research team.
3) Setting up a LAN in a building that is not wired for a LAN.
Using the wireless LAN to perform inventory in a large warehouse.
4) NIC which stands for Network Interface Card is a printed ciruit board that is a layer 1 and 2 device that provide services at the data link level.
Some of the architectures are Ethernet, Token Ring, Local Talk.
Companies are 3com, Motorola, Cisco, syslink.
Ethernet Written by Unknown 1992--2002 Cisco
Jerry Becker Mon, 20 Dec 1999
Cisco Second-Year Companion Guide Second Edition
2001
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