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- ation layer is concerned with the _(71)&n
- bsp; and semanti
- cs of the informationexchange
- d between two systems． The processes in two systems are usually exchanginginformation in the form. of character (72)-,numbers, and so on． The information should be changed to bit (73) before ．being transmitted． Because different computers u
- A． 192．168．0．1
- B． 0．0．0．0
- C． 255．255．255．0
- D． 255．255．255．255 O ARP请求消息是以 (70) 包发送的。 (70)
- A．单播
- B．组播
- C．广播
- D．任意播
- A．ipconfig/renew
- B．route print
- C．nslookup
- D．ping (66)
- A．119．245,67．209
- B．119,245．67．254
- C． 127．0．0．1
- D． 240．0．0．0 (67)
- A． 119．245．67．209
- B． 119．245．67．254
- A．网站
- B．筛选器
- C．文档
- D．HTTP头
- A．/etc/profile
- B．/etc/disk
- C．/etc/fstab
- D．/etc/hosts
- A．cat
- B．more-
- C．d f
- D．lpr
- A．FTP
- B．EMAIL
- C．TELNET
- D．QQ (62)
- A． 21
- B．23
- C．25
- D．80
- A．用户访问事件、安全性事件和系统事件
- B．应用程序事件、安全性事件和系统事件
- C．网络攻击事件、安全性事件和记帐事件
- D．网络连接事件、安全性事件和服务事件
- A．Intemet
- B．本地Intranet
- C．可信站点
- D．受限站点
- A．Worm．Sasser
- B．Trojan．QQPSW
- C． Backdoor．IRCBot
- D．Macro．Melissa (58)
- A．EXE
- B．COM
- C．Word
- D．DLL
