TCP vs UDP

Question 1

Which protocol is connectionless?

Answer 1

UDP

Question 2

Which protocol is reliable?

Answer 2

TCP -- 
Manages:
- Acknowledgement
- Retransmission
- Timeout

Question 3

Which protocol is unreliable?

Answer 3

UDP –

• Not known if sent message will reach destination.
• No concept of acknowledgement, retransmission, or timeout.

Question 4

Which protocol is ordered?

Answer 4

TCP –

When two messages sent in sequence, message 1 will reach receiving application first.

Question 5

Which protocol is Unordered?

Answer 5

UDP –

When two messages sent to same recipient in sequence, no guarantee on which message will get to app first.