# 455 Sep 3 - Day07

Attendance: enter your name.
*

# Review
Suppose an enterprise's web traffic is routed through a proxy
cache server with average response time 0.1 and hit rate 40%, 
while accesses to the origin servers for web pages take 1 second.
What is the average response time seen by clients in the enterprise?
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In the previous problem, how much is the enterprise's external
traffic reduced?
  60%
  50%
  40%
  10%


Which of the following is true?
  GET requests cannot convey form data
  POST requests convey form data in the URL part of the request
  GET requests convey form data in the Entity Body part of the request
  POST requests convey form data in the Entity Body part of the request

A major advantage of HTTP/1.1 over HTTP/1.0 is
  Persistent connections that allow multiple requests to the same server using a single connection
  Faster retrieval of complex pages using multiple connections
  Encrypted connections

This classroom response system uses multiple persistent connections. I find that it
misbehaves with some browsers because the browsers limit the number of simultaneous
persistent connections. Why would they do that?
  The standard suggests it
  Avoid using too many resources on the server
  Avoid using too many resources on the client
  All of the above

#New
The mail user agent is a mail server
  True
  False

The purpose of using mail servers in the Internet mail architecture is
  Allow mail to be sent to a recipient who is currently off line
  Ensure that the FBI can read any mail that you send
  Implement a store-and-forward architecture
  Allow mail to be stored for a long period of time