SMTP is used to

Suppose the hit rate is .5 in a caching example. Calculate the average delay by assuming the time of the requests to be satisfied from cache is 10 milliseconds and the time of the requests still need to be satisfied by the origin servers is 1.2 seconds

Local DNS name servers

For BitTorrent, which of the following is true:

Suppose a DNS resource record has Type=MX. Then

Ethernet is a popular residential Internet access technology.

A browser will generate header lines as a function of

1.4-1 End-to-end Delay. Consider the network shown in the figure below, with three links, each with a transmission rate of 1 Mbps, and a propagation delay of 1 msec per link. Assume the length of a packet is 1000 bits.

What is the end-end delay of a packet from when it first begins transmission on link 1, until is it received in full by the server at the end of link 3.  Assume store-and forward packet transmission.

1.3-7 Packet switching or Circuit-switching? Consider a scenario in which 5 users are being multiplexed over a channel of 10 Mbps.  Under the various scenarios below, match the scenario to whether circuit switching or packet switching is better.