题目内容

下面加密算法中,加密和解密需要用不同密钥的是()。

AES
B. RSA
C. IDEA
DES

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为用户提供远程登录功能的协议是(1),其访问端口默认为(2)。 空白(1)处应选择()

A. FTP
B. EMAIL
C. TELNET
D. QQ

网址http://www.tsinghua.edu.cn表示其对应的网站属于()。

A. 教育部门,国家域名是edu
B. 政府部门,国家域名是cn
C. 教育部门,国家域名是cn
D. 政府部门,国家域名是edu

One ofthe main resposibilities of ICMP is to report(1).Although technology has produced increasingly relaible transmission media, errors still exist and must be handled. IP is an (2) 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 (3) errors, it simply report them. Error correction is left to the higher-level potocols. Error messages are always sent to the original (4) because the only information available in the datagram about the route is the source and destination IP addresses. ICMP use the source IP address to sent the error massage to the source of the (5). 空白(3)处应选择()

A. correct
B. conduct
C. product
D. connect

在单CPU系统中,若I/O设备与主机采用中断控制方式交换信息,则CPU与I/O设备间是()。

A. 串行工作,数据传送过程与主程序也是串行工作
B. 串行工作,数据传送过程与主程序间是并行工作
C. 并行工作,数据传送过程与主程序是串行工作
D. 并行工作,数据传送过程与主程序也是并行工作

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