Link Layer Flashcards
1
Q
What services does the link layer provide?
A
Framing, Link Access, Error detection and correction, Reliable delivery of packets
2
Q
How does the link layer provide link access and what protocol is used?
A
The MAC protocol is used, this will manage the transmissions between nodes, through the nodes
3
Q
How does the link layer conduct framing?
A
The link layer will encapsulate a network layer datagram into a link layer frame
4
Q
How does the link layer ensure reliable delivery?
A
By using acknowledgements and retransmission in the case of errors (SYN/ACK)
5
Q
How does the link layer detect errors in frames
A
By using frame check sequences such as CRC, checksum and parity check
6
Q
What is the best frame check sequence?
A
CRC this detects 99% of errors
