CPS 472/572 In-Class Challenge

Reviewing Applications and Transport Level

Chapters 2 and 3

Dr. Jennifer Seitzer

We have covered material from the following topics:

¨ Application Level Protocol Principles

¨ Client-Server Programming using the Socket API

¨ HTTP and the World Wide Web

¨ File Transfer Protocol: FTP

¨ Domain Name System: Recursive and Iterative Algorithms

¨ Client-Server Programming using JAVA

¨ Transport Layer

¨ Multiplexing and Demultiplexing Applications

¨ Connectionless Transport: UDP (one's complement checksum)

¨ Principles of Reliable Transport

¨ Congestion Control

¨ Transmission Control Protocol (TCP)

¨ Implementation of TCP using TCB's

¨ Sliding Window Flow Control

¨ Go Back N Flow Control

For exam preparation, be sure to study all notes, in-class challenges, homeworks, and quizzes. Here are some additional questions to help with your study.

1. How does TCP establish a connection? Define all terms and give an example of your answer.
   
   
   
   
   
   
   
2. Give an example scenario between two hosts where a 2-way handshake is not sufficient to establish a connection.
   
   
   
   
   
   
   
3. Give an example of a program that is both a client and a server. You may state a well-known application or describe one of your own designs.
   
   
   
   
   
   
   
   
4. Give a 10-word description of each of the necessary socket calls used in a connection-oriented client.
   
   
   
   
   
5. Give a 10-word description of each of the necessary socket calls used in a connection-oriented server.
   
   
   
   
   
   
   
   
   
6. Discuss the fundamental differences of UDP and TCP.
   
   
   
   
   
   
   
   
   
7. What is SMTP? Draw a diagram of participating nodes and servers where node A sends email to node B. Be sure to indicate which node houses the SMTP client and which houses the SMTP server.
   
   
   
   
   
   
   
   
   
   
8. What are the main differences between a concurrent and an iterative server?
   
   
   
   What are the advantages and disadvantages or each?
   
   When is it appropriate to use each?
   
   
   
   
9. What is the main reason HTTP/1.1 is superior to HTTP/1.0 performance-wise? Define all terms and give an example to illustrate your reason.
   
   
   
   
   
   
   
   
   
10. How is FTP similar to HTTP? How is it different? (Hint- use textbook.)
    
    
    
    
    
    
    
11. What are the socket calls used in a connectionless UDP server to send and receive data?