INF 620 Laboratory 1 UNDERSTANDING INTERNET PROTOCOLS

1. Find and identify the RFCs for IP and TCP (Questions you should answer are highlighted).

Go to the RFC Editor and download the specifications for IP and TCP. 

Procedure:
1. Point your browser to http://www.rfc-editor.org
2. Read the page, find the in-text "RFC SEARCH" link, and click on it.
3. In the search field "Title/Keyword," type in the complete name of the protocol (eg "Internet Protocol", not "IP").
4. By default, the search results are displayed by RFC number (ascending). Also, by default, the number of results shown is 25. Click 'All' to show all the results.
5. Identify the RFC for each protocol, by RFC number: 
RFC _______ Internet Protocol
RFC _______ Transmission Control Protocol
6. Download the RFCs (ASCII or PDF) and use them to answer the following questions:

2. Refer to the RFCs to answer the following questions.

Questions about IP:
1. What two basic functions does IP implement?
2. What four key mechanisms does IP use to provide its service?
3. Via what protocol does IP communicate errors?
4. In the IP header, what is the Identification field used for?
5. A number of bits within the IP header are designated reserved or optional; why would these be important in network security?

Questions about TCP:
1. What is the difference between a socket and a connection?
2. What are the five calls the TCP/user interface provides for?
3. What is a passive OPEN request?
4. Describe the three-way handshake.
5. At a workstation, open some web pages and then at a command prompt type

netstat -a .