计算机网络 大学英语作文,计算机网络(全英文版)期末复习

计算机网络,全英文

计算机网络

是非题 1.In computer networking jargon, the computers connected to the Internet are referred to as end systems, including servers , routers, mobile computers.

2.One of the attractive features of DSL and HFC is that the services are always on。

3.HTTP/1.1 uses inpersistent HTTP with pipelining.

4.UDP socket is identified by two-tuple: dest IP address, dest port number.

5.The IPv6 addresses space is 264.

6.ARP translates computer name to network-layer address.

7.HTTP uses reliably transfer email message from client to server, port number is 52.

8.Link Layer Services include Error Detection, full-duplex etc.

9.Star topology popular through mid 90s, Now bus topology prevails.

10.FTP,SMTP,POP3 and IMAP run on top of TCP rather than UDP.

11.With the SR protocol ,it is possible for the sender to receive an ACK for a packet that falls outside of its current window.

12.With GBN, it is possible for the sender to receive an ACK for a packet that falls outside of its current window. 13.Ethernet frames can carry more than 1500 bytes of data ,whereas frames for some wide-area links can carry no mare than 576 bytes.

14.Ipv6 allows for fragmentation at routers and IP header to be extended,but Ipv4 not.

15.For TDM, the time domain is segmented into four circuits; each circuit is assigned the same dedicated slot in the revolving TDM frames. The transmission rate of the frame is equal to the frame rate multiplied by the number of bits in a slot.

16.Most packet switches use store and forward transmission at the inputs to the links. Store-and-forward transmission means that the switch must receive the entire packet before it can begin to transmit the first bit of the packet onto the outbound link.