9. UDP, Datagram Sockets and Multicast Flashcards
1
Q
Describe UDP.
A
- not connection oriented
- not very reliable, checksum is optional and no sequence numbers
- not two-way
- can be unicast or mutlicast
2
Q
Why might a streaming media and conversational media i.e skype use UDP instead of TCP?
A
TCP’s congestion control means it may take some time for the packets to arrive, whereas UDP has no such control. This means there will be less buffering time and delay in conversation.
3
Q
What are the 3 patterns of communication?
A
Unicast - one to one
Broadcast - one to all
Multicast - one to many
can be made from each other
