| Q1: | What types of services are defined at the Network Access layer? |
|
A1:
| The Network Access layer includes services and specifications that manage the process of accessing the physical network. |
| Q2: | Which OSI layers correspond to the TCP/IP Network Access layer? |
|
A2:
| The Network Access layer roughly corresponds with the OSI Data Link layer and Physical layer. |
| Q3: | What are the two most common LAN architectures? |
|
A3:
| The most common LAN architectures are ethernet, with its several cabling variants, and token ring. |
| Q4: | What is CSMA/CD? |
|
A4:
| CSMA/CD is Carrier Sense Multiple Access with Collision Detect, a network access method used by ethernet. Under CSMA/CD, the computers on a network wait for a moment to transmit and, if two computers attempt to transmit at once, they both stop, wait for a random interval, and transmit again. |
| Q5: | What is token passing? |
|
A5:
| Token passing is a network-access method used by token ring and FDDI. A packet of data called a token circulates around the network. Only the computer with the token can transmit data. |
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