TCP and UDP

Question 1

TCP

Answer 1

Transmission Control Protocol (Layer 4) Reliable, verifies receipt of data, ends gracefully

Question 2

UDP

Answer 2

User Datagram Protocol (Layer 4) Not as reliable as TCP but much quicker – used for video streaming, or small data transfers (ie DNS).

Question 3

TCP Everyday example

Answer 3

Phone call 1. Establish session (Dial number and say hello). 2 Acknowledge information received (saying “got it” or “I didn’t get that you were breaking up”) 3. Ending session (“Good bye” and hang up).

Question 4

What are 3 steps in TCP 3 way handshake

Answer 4

1. Client -> Syn (Synchronize) 2. Server -> Syn Ack (Synchronize Acknowledgement) 3. Client -> Ack (Acknowledgement)

Question 5

What are 4 steps in TCP 4 way disconnect

Answer 5

1. Server -> FIN (Finish) 2. Client -> FIN ACK (Finish Acknowledgement) 3.Client-> FIN (Finish) 4. Server-> FIN ACK (Finish Acknowledgement)

Question 6

TCP Reset

Answer 6

RST is sent abruptly ending the session; similar to hanging up a phone.

Question 7

Client Port Numbers

Answer 7

Referred to as Ephemeral Port Numbers (temporary)