3. The Network Access Layer

Question 1

1. What is a CRC?

Answer 1

A CRC (cyclic redundancy check) is a checksum that is used to verify that the data in a frame has not been corrupted

Question 2

2. What is a collision detection on an ethernet network?

Answer 2

A collision occurs when two nodes on an Ethernet start transmitting at the same time. When the nodes detect that this has happened, a collision detection is said to have occurred.

Question 3

3. How big is an ethernet physical address?

Answer 3

An Ethernet physical address is 48 bits.

Question 4

4. What is the purpose of NDIS and ODI?

Answer 4

NDIS and ODI provide a standard interface to the network hardware that TCP/IP and other networking stacks can use to access the network hardware in a consistent and uniform way.

Question 5

5. What does ARP do?

Answer 5

ARP provides a link between physical address and logical IP address.