TNE 10006 Module 6

The data link layer does the following:

• Enables upper layers to access the media.

• Accepts data from Layer 3 packets

• Encapsulates packet into Layer 2 frames

• Performs error detection and rejects any corrupt frame

• Disable upper layers to access the media.

A device that can receive, create, store, or forward data along a communications path. What is this?

The IEEE 802 LAN/MAN data link layer consists of the following two sublayers

Logical Link Control (LLC) (_) between the networking software at the upper layers and the device hardware at the lower layers.

What is (_)?

LLC places information in the frame that (_) which network layer protocol is being used for the frame.

What is (_)?

Media Access Control (MAC) implements this sublayer (IEEE 802.3, 802.11, or 802.15) in (_).

1) responsible for data encapsulation and media access control

2) provides data link layer addressing

3) integrated with various physical layer technologies
What is the sublayer?

Which IEEE sublayer is under LLC

• 802.3

• 802.2

• 802.4

• 802.5

Which IEEE sublayer is under MAC

• 802.3

• 802.2

• 802.11

• 802.15

What sublayer takes the network protocol data, which is typically an IPv4 or IPv6 packet, and adds Layer 2 control information to help deliver the packet to the destination node. 

• LLC sublayer
• Transport layer
• Physical layer
• MAC sublayer