Please answer all questions.

1) Answer the following questions about the HTTP protocol (50 pts):

• What is a communication protocol?

• What is the structure of an HTTP request message?

• What is the structure of an HTTP response message?

• Why do HTTP messages carry a version field?

• What is a stateless protocol? Why was HTTP designed to be stateless?

2) Answer the following questions about Application Architecture (50 pts):

• What is a three-tier architecture?

• What advantages does it offer over single-tier and two-tier architectures?

• Give a short overview of the functionality at each of the three tiers.

NOTE: This is due next class, October 15, 2005 – No late submissions!