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 OSIlayers correspond to the TCP/IPNetwork 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 LANarchitectures?
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.