Lecture 5

Question 1

What is the difference between the network and transport layer?

Answer 1

Question 2

What is a traceroute?

Answer 2

Question 3

What is the difference between TCP and UDP?

Answer 3

Question 4

How is TCP set up?

Answer 4

Question 5

What is the basic idea behind TCP?

Answer 5

Question 6

What is packet numbering?

Answer 6

Question 7

What is the TCP sliding window?

Answer 7

Question 8

How does the TCP sliding window work?

Answer 8

Question 9

What is the Bandwidth Delay Product?

Answer 9

Question 10

What is the formula of the Bandwith Delay Product?

Answer 10

Question 11

What is TCP slow start?

Answer 11

Question 12

How does TCP slow start work?

Answer 12

Question 13

What are the three purposes of the TCP sliding window?

Answer 13

Question 14

What is TCP congestion control?

Answer 14

Question 15

What are the three parts of TCP congestion control?

Answer 15

Question 16

What is AIMD? How does it work?

Answer 16

Question 17

What is congestion avoidance? How is it related to AIMD?

Answer 17

It uses AIMD to avoid congesting the network

Question 18

What is fast retransmit?

Answer 18

Question 19

What is Fast Recovery?

Answer 19

Question 20

When does congestion avoidance take over?

Answer 20

Question 21

What is ssthresh?

Answer 21

Question 22

How is ssthresh determined?

Answer 22

Initially very large, then scaled down in the following cases

Question 23

What are the two main reasons TCP and HTTP don’t like each other?

Answer 23

Question 24

What is the main idea behind the Mathis’ TCP Square-Root Formula? What is it for?

Answer 24

Thoughput

Question 25

What is the PFTK Throughput Formula? Thoughput

Answer 25