计算机网络作业题(2022年12月版).docx

计算机网络作业题(2022年12月版)
计算机网络作业题(2022年12月版)
第一章
1. Consider sending a packet of F bits over a path of Q linwhere is the last bit
of the packet?
e. Suppose d prop is greater than d trans. At time t= d trans, where is the first bit of the packet?
f. Suppose d prop is less than d trans. At time t=d trans, where is the first bit of the packet?
g. Suppose s=·108, L=101bits, and R=28kbps. Find the distance m so that d prop equals d trans. 2、
a)m/s
b)L/R
c)m/s+ L/R
d)Interface of host A
e)s*d trans=s*L/R
f)Host B
g)m/s= L/R=> m=*105
第二章
1. In the following figure, Alice sends an e-mail to Bob, and Bob gives a reply to Alice. If Alice and Bob both use mail user agent, please write what protocol is used in procedur e①～⑥? If both Alice and Bob use Web browser, what protocol is used in procedure①～⑥?


（1）①SMTP; ②POP3 or IMAP; ③SMTP; ④SMTP; ⑤POP3 or IMAP; ⑥SMTP
①③⑤
计算机网络作业题(2022年12月版)
第一章
1. Consider sending a packet of F bits over a path of Q links. Each link transmits at R bps. The network is lightly loaded so that there are no queuing delays. Propagation delay is negligible.
a. Suppose the network is a packet-switched virtual-circuit network. Denote the VC setup time by
t s seconds.