Data link layer Flashcards

1
Q

What are the two sublayers in layer 4 and what are their functions

A

LLC - Logical link layer. It communicates between the networking software in the upper layers and the physical hardware in the lower layers

MAC - media access control. It is responsible for media access control and data encapsulation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the 4 basic layer 2 functions

A
  1. Accepts a frame from the network medium
  2. De-encapsulates the frame to expose the new de-encapsulated packet
  3. Re-encapsulate it into a new frame
  4. Forward the new frame on the medium of the next network segment
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Characteristic of MAC address

A
  1. An Ethernet MAC address consists of a 6 hexadecimal vendor OUI code followed by a 6 hexadecimal vendor-assigned value.
  2. An Ethernet MAC address is a 48-bit address expressed using 12 hexadecimal digits. Because a byte equals 8 bits, we can also say that a MAC address is 6 bytes in length.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly