【名词&注释】
移动用户(mobile user)、数据通信(data communication)、局域网(lan)、输出设备(output device)、互连网(interconnection networks)、粗同轴电缆(thick coaxial cable)、数据终端设备(data terminal equipment)、用户数据报
[填空题]同轴电缆分为粗同轴电缆(thick coaxial cable)和细同轴电缆两种,计算机网络中所使用的一段粗同轴电缆(thick coaxial cable)的最大长度为()米,一段细同轴电缆的最大长度为()米。
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学习资料:
[单选题]SMTP是()
A. A、邮箱协议
B. B、收信的协议
C. C、发信的协议
D. D、网络传输协议
[单选题]The de facto standard Application Program Interface (API) for TCP/IP applications is the “sockets” interface. Although this API was developed for (71) in the early 1960s it has also been implemented on a wide variety of no-Unix systems. TCP/IP (72) Written using the sockets API have in the past enjoyed a high degree of portability and we would like the same (73) with IPv6 applications. But changes are required to the sockets API to support IPv6 and this memo describes these changes. These include a new socket address structure to carry IPv6 (74) ,new address conversion functions, and some new socket options. These extensions are designed to provide access to the basic IPv6 features requited by TCP and UDP applications, including multicasting, while introducing a minimums of change into the system and providing complete (75) for existing IPv4 applications.
A. A.Windows
B. B.Linux
C. C.Unix
D. D.DOS
[单选题]共享介质局域网是基于()技术。
A. A.分组交换B.电路交换C.直接交换D.ATM交换
[单选题]一台PC机通过调制解调器与另一台PC机进行数据通信,其中PC机属于()。
A. A、输入和输出设备B、数据复用设备C、数据终端设备(data terminal equipment)DTED、数据通信设备DCE
[单选题]Ping使用的是TCP/IP中的哪个协议()。
A. 用户数据报协议(UDP)
B. 互连网控制报文协议(ICMP)
C. 地址解析协议(ARP)
D. 你想地址解析协议(RARP)
[单选题]DHCP()报文的目的IP地址为255.255.255.255
A. DhcpDiscover
B. DhcpDecline
C. DhcpNack
D. DhcpAck
[单选题]下列关于DHCP服务的叙述中,正确的是()。
A. 一台DHCP服务器只能为其所在网段的主机分配IP地址
B. 对于移动用户设置较长的租约时间
C. DHCP服务器不需要配置固定的IP地址
D. 在Windows客户机上可使用ipconfig/release释放当前IP地址
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