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RAM

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   2021年下半年
   网络管理员
   上午试卷综合知识

第8题
选择题

在下列存储器中，采用随机存取方式工作的是()。
①DRAM
②SRAM
③EEPROM
④CD-ROM
⑤DVD-ROM

78%

   2021年上半年
   网络管理员
   上午试卷综合知识

第71题
选择题

The Address Resolution Protocol (ARP) is developed to enable communications on an internetwork and performs a required function in IProuting. ARPlies in the(71)layer of the TCP/IP model, and allows computers to introduce each other across a network prior to communication. ARP finds the(72)address ofa host from its known(73)address.Before a device sends a datagram to another deviceit looks in ..

83%

   2019年下半年
   网络管理员
   上午试卷综合知识

第71题
选择题

ICMP is short for Internet (71) Message Protocol, and is an integral part of the Internet (72) suite (commonly referred to as TCP/IP). It is a (73) layer protocol used by network devices to diagnose network communication issues. IP is not designed to be absolutely reliable. ICMP is to provide feedback about problems in the communication environment, not to make IP (74).One of the most well-known a..

56%

   2018年下半年
   网络管理员
   上午试卷综合知识

第71题
选择题

In multipoint networks , there are tree persistence methods when a station finds a channel busy.in the 1-persistent method,after the station finds the line idle,it sends its frame immediately.this method has the （71）chance of collision because two or more stations may find the line （72）and send their frames immediately. In the nonpersistent method , a station that has a frame to send （73）the..

68%

   2017年下半年
   网络管理员
   上午试卷综合知识

第71题
选择题

The Hypertext Transfer Protocol , the Web's （71）protocol , is at the heart of the Web. HTTP is implemented in two programs : a（72） program and a server program . The client program and server program, executing on different end systems , talk to each other by（73）HTTP messages . HTTP defines how Web clients request Web pages from servers and how servers transfer web pages to clients . when a ..

55%

   2017年上半年
   网络管理员
   上午试卷综合知识

第71题
选择题

CSMA,although more efficient than ALOHA or slotted ALOHA,still has one glaring inefficiency.If the medium is busy,the station will wait for a random amount of time. When two frames collide,the medium remains (71) for the duration of transmission of both damaged frames. The use of random delays reduces the probability of (72). For (73) frames,compared to propagation time,the amount of wasted capaci..

75%

   2016年上半年
   网络管理员
   上午试卷综合知识

第4题
选择题

以下关于SRAM（静态随机存储器）和DRAM（动态随机存储器）的说法中，正确的是（4）。

44%

   2015年下半年
   网络管理员
   上午试卷综合知识

第43题
选择题

有以下HTML代码，在浏览器中显示正确的是（）。
<html>
<frameset rows="25%,50%,25%">
<frame src="/html/frame_A.html">
<frame src="/html/frame_B.html">
<frame src="/html/frame_C.html">
</frameset>
</html>

37%

   2014年上半年
   网络管理员
   上午试卷综合知识

第71题
选择题

Together with the network layer,the transport layer is the heart of the protocol ( 71）.The network layer provides end-to-end (72) delivery using datagrams or virtual circuits.The transport layer builds on the network layer to provide data transport from a process on a (73) machine to a process on a destination machine with a desired level of reliability that is independent of the physical (74) cu..

74%

   2011年下半年
   网络管理员
   上午试卷综合知识

第71题
选择题

One of the main resposibilities of ICMP is to report(71). Although technology has produced increasingly relaible transmission media, errors still exist and must be handled. IP is an(72)protocol. This means that error checking and error control are not a concern of IP. ICMP was designed, in part, to compensate for this shortcoming. Howerver, ICMP does not(73)errors, it simply report them. Error cor..

61%

   2011年上半年
   网络管理员
   上午试卷综合知识

第9题
选择题

若SRAM芯片的存储容量为64KX16位，则其地址线与数据线数目应为（9）,使得访问其指定存储单元时，能将地址信号和数据信号一次性地并行传输。

60%

   2010年下半年
   网络管理员
   上午试卷综合知识

第71题
选择题

A transport layer protocol has several responsibilities. One is to create a process-to-process (program-to-program) communication; TCP uses port(71)to accomplish this. Another responsibility of a transport layer protocol is to create a(72)and error-control mechanism at the transport level.TCP uses a sliding(73)protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retra..

63%

   2009年上半年
   网络管理员
   上午试卷综合知识

第71题
选择题

An internet is a combination of networks connected by (71) . When a datagram goes from a source to a (72) . it will probably pass many (73) until it reaches the router attached to the destination network. A router receives a (74) from a network and passes it to another network. A router is usually attached to several networks. When it receives a packet, to which network should it pass the packet? ..

44%

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