题目内容

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(1)处应选择()

A. numbers
B. functions
C. strings
D. errors

查看答案
更多问题

在Linux系统中,对于()文件中列出的Linux分区,系统启动时会自动挂载。

A. /etc/profile
B. /etc/disk
C. /etc/fstab
D. /etc/hosts

用户A从CA获得用户B的数字证书,并利用()验证数字证书的真实性。

A. B的公钥
B的私钥
CA的公钥
D. CA的私钥

HTML中的标记可用来定义表格中()的属性值。

A. 列
B. 行
C. 单元格
D. 图像

公司面临的网络攻击来自多方面,一般通过安装防火墙来防范(1),安装用户认证系统来防范(2)。 空白(1)处应选择()

A. 外部攻击
B. 内部攻击
C. 网络监听
D. 病毒入侵

答案查题题库