Week 3 Summary

Question 1

What transport-layer services are provided by the base TCP protocol? (Check all that apply)

• Congestion control
• Reliable data transmission
• Minimum bandwidth
• Jitter minimization
• Connection-oriented service
• Flow control
• Message security

Answer 1

Congestion control
Reliable data transmission
Connection-oriented service
Connection-oriented service

Question 2

The minimum necessary information for identifying a process on a remote host would be (check all that apply):

Answer 2

Remote Port Number

Remote Port Number

Question 3

The reserved port for FTP control is port

Answer 3

21

Question 4

HTTP implements a conditional GET using if-modified-since.

Answer 4

TRUE

Question 5

FTP is implemented over a pair of TCP connections.

Answer 5

TRUE

Question 6

The reserved port for SMTP is port

Answer 6

25

Question 7

What must an application-level protocol specify?
 Message response rules
  Message Fields & Structure
  Types of messages exchanged
  Message Semantics
  Message sending rules

Answer 7

TRUE

Question 8

HTTP implements caching by use of a conditional GET.

Answer 8

TRUE

Question 9

The reserved port for SSH is port

Answer 9

22

Question 10

A client-side piece of data which is used to keep track of transactions between a client and server is called a cookie.

Answer 10

TRUE

Question 11

The reserved port for FTP data transfer is port

Answer 11

20