JH Net+ Ch9

Question 1

T/F? MAC addresses are always local on the LAN and never go through and past a router.P 282

Answer 1

T

Question 2

What is LAN Driver?P 282

Answer 2

It is used to provide media access via the type of LAN being used.

Question 3

What is Ether-Type field?P 282

Answer 3

That describes the Network layer protocol that handed the packet to the Data Link layer

Question 4

How many MAC addresses are in a Frame?P 282

Answer 4

There are 2 MAC addresses. Destination MAC and Source addresses.

Question 5

A router tries to route a packet but can not find the network on the routing table. What will router do with the packet?P 283

Answer 5

The package will be discarded immediately.

Question 6

What is the purpose of CRC in the Frame?P 283

Answer 6

To check to make sure the information is correct. For instance Destination MAC and Source addresses.

Question 7

T/F? IP does not run a complete CRC the way the Data link layer does. It only checks the header for errors.P 285

Answer 7

T

Question 8

What are the information Data Link layer frames the packet and including following in the header?P 285

Answer 8

1. The destination and source hardware addresses.2. The Ether-Type field with 0X0800(IP).3. The FCS field with the CRC results.

Question 9

When Host A pings Host B, you see a Request Timed Out message because it is an unknown error. What happens to the packetP 285

Answer 9

The packet is lost on the way back to the originating host.

Question 10

When Host A pings Host B, you see a Destination Unreachable message. what is happening? P 285

Answer 10

The route that is not in the routing table on the way to the destination device.