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.

计算机网络,全英文

17.If a network employs virtual circuits, then the network's switches must maintain the ongoing connections. Specifically, each time a new connection is established connection entry must be added to the switch's VC number translation table; and each time a connection is released, an entry must be removed from the table.

名词解释：写英文全称和汉语全称

DNS Domain Name System 域名系统

FDM Frequency Division Multiplexing 频分多路复用

SMTP Simple Mail Transfer Protocol 简单邮件传输协议

TCP Transport Control Protocol 传输控制协议

RIP Routing Information Protocol 路由信息协议

ARP Address Resolution Protocol 地址解析协议

CSMA/CD Carrier Sense multiple Access/ Collision Detection 带有碰撞检测的载波侦听多点访问

MIME Multipurpose Internet Mail Extensions 多用途英特网邮件扩充协议

填空题

1.DNScvoked by an application to obtain the canonical hostname for a supplied alias hostname as well as the（IP address）of the host。

2.Two approaches toward congestion control are （end-to-end congestion control）and （network assisted congestion control）

3.The most fundamental responsibility of UDP and TCP is to extend IP's delivery service, extending host-to-host delivery to process-to-process delivery is called （transport layer multiplexing 多路传输、复用）and（demultiplexing多路分解 ）

4.Four types of OSPF routers（internal routers ） （boundary routers）（areas border routers） （backbone routers）

5.（filtering）(过滤、筛选)is the ability to determine whether a frame should be forwarded to an interface or should just be dropped.When the frame should be forwarded, （forwarding）（转发、运输）is the ability to determine which of the interfaces the frame should be directed to. These are done with a （switch table）.

计算机网络,全英文

6.Two generic forms of pipelined（流水线） protocols are （Go-back-N）and (selective repeat ).

7.(flow control)means that sender won’t overflow receiver’s buffer by transmitting too much, too fast. ( congestion control)is used to prevent too many hosts from sending too much data too fast for network to handle.

8.Moving packets from router’s input to appropriate router output is called (forwarding). Determining route taken by packets from source to dest is called ( routing).

( RIP) and (OSPF ) are two routing protocols have been used for routing within an autonomous system in the internet.

9.In practice, algorithms with global state information are referred to as (link state)algorithm,since the algorithm must be aware of the cost of each link in the network. The decentralized routing algorithm is called (distance vertor ) algorithm,because each node maintain a vector of estimates of the costs to all other nodes in the network.

10.Each IP node (Host, Router) on LAN has ARP table, ARP Table includes three parts: ( IP address),( MAC address)and TTL.

11.Any multiple access protocol belongs to one of the three categories: (channel partitioning protocol),(Random Access )and taking-turns protocols.

12.A switch has the property of building its table automatically, dynamically and autonomously -- without anyintervention from a network administrator or from a configuration protocol. In other words, switches are （self-learning / plug and play）。

13.Data which an application wants to send and passed onto the transport layer are called（application-layer message ）。Data generated by the transport layer and encapsulates application-layer message with transport layer header are called（transport-layer segments）。Data encapsulated transport-layer segment with a network-layer header are ca …… 此处隐藏：10487字，全部文档内容请下载后查看。喜欢就下载吧 ……