【名词&注释】
客户端(client)、物理层(physical layer)
[单选题]关于QQ用户登录的描述中，正确的是
A. 客户端每次均直接访问登录服务器的IP地址
B. 登录前可以向其他用户发送消息
C. 实现成功登录前可能连接多个登录服务器
D. 客户端产生会话密钥
查看答案&解析
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举一反三：
[多选题]从供选择的答案中选出应填入英语文句中()的正确的答案。PCs originated as stand-alone (
A. , however, in recent years many have been (
B. to Local Area Networks (LANs). In a LAN, the data and usually the user application reside on the
C. File Server, a P
D. running a special Network Operating System (NOS) such as Novell's NetWare or Microsoft's LAN Manager. The
E. File Server manages the LAN users' shared access to data on its hard (
F. and frequently provides access to other shared resources, such as printers. While a LAN enables users of P
G. C-based databases to share (
H. data files, it doesn't significantly change how the
I. DBMS works; all the actual data (
J. is still performed on the P
K. running the database application.
L. A～E: ① calculating ② common ③ connected ④ disks
[单选题]●Adding 5 people to a 4 person team increases the communication channels by a factor of (75).(75)
A. 3 times
B. 4 times
C. 5 times
D. 6 times
[单选题]文中（ 2 ）处正确的答案是（ ）。
A. (N+1)层协议
B. N层协议
C. (N一1)层协议
D. 物理层
[单选题]
B． 429
C． 720
D． 产生分段错误
A. 189B． 429
B. 720
C. 产生分段错误
[单选题]
B． hypertext
C． paintext
D． supertext
A. ciphertextB． hypertext
B. paintext
C. supertext
[单选题]
B． use-case modeling
C． dynamic modeling
D． class modeling
A. static modelingB． use-case modeling
B. dynamic modeling
C. class modeling
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