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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 us
- 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．网站
- B．筛选器
- C．文档
- D．HTTP头
- 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．/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．Intemet
- B．本地Intranet
- C．可信站点
- D．受限站点
- 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．Worm．Sasser
- B．Trojan．QQPSW
- C． Backdoor．IRCBot
- D．Macro．Melissa (58)
- A．EXE
- B．COM
- C．Word
- D．DLL
