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1●HTTP协议是常用的应用层协议，它通过 (60) 协议提供服务，上下层协议默认时，使用 (61) 端口进行服务识别。HTTP双方的一次会话与上次会话是 (62) ，即协议是无状态的。从交换信息的整体性说是 (63) ，SHTTP对HTTP的扩展在于 (64) 。
A.IP
B.UCP
C.TCP
D.ICMP
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2●MIB-Ⅱ组的组织结构是一种 (59) 。
A.链表结构
B.线性结构
C.树形结构
D.分层结构
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3●Telnet采用 (58) 方法确定对方的TSAP。
A.静态分配TSAP
B.动态分配TSAP
C.名字服务器
D.随机选取TSAP
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4●动态主机配置协议DHCP是对BOOTP协议的扩充，DHCP与BOOTP的主要区别是DHCP具有 (53) 机制。DHCP协议支持的中继代理(Relay Agent)是一种 (54) ，它可以在不同的网段之间传送报文。DHCP具有多种地址分配方案，对于移动终端(比如笔记本电脑)最适合的分配方案是 (55) 。使用Windows 2000操作系统的DHCP客户机，如果启动时无法与DHCP服务器通信，它将 (56) 。因为DHCP报文是装入 (57) 数据单元中传送的，所以它是不安全的。
A.动态地址绑定和租约
B.报文扩充
C.配置参数提交
D.中继代理
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5●标准访问控制列表以 (52) 作为判别条件
A.数据包的大小
B.数据包的源地址
C.数据包的端口号
D.数据包的目的地址
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6(66).is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication．<br class="bogusBR">(67).is a professional organization of individuals in multiple professions which focuses on effort on lower-layer protocols．<br class="bogusBR">(68).functions with two layers of protocols．It Can connect networks of different speeds and can be adapted to an environment as it expands．<br class="bogusBR">(69).is the popular LAN developed under the direction of the IEEE 802．5．<br class="bogusBR">(70).is the popular backbone technology for transmitting information at high speed with a high level of fault tolerance which is developed under the direction of ANSI．
A.The MAC address
B.The IP address
C.The subnet address
D.The virtual address
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7●In low-speed network,it is usually adequate to wait for congestion to occur and then react to it by telling the source of packets to slow down．In high-speed networks, this approach often works poorly, because in the (71) between sending the notification and notification arriving at the source, thousands of additional (72) may arrive．In ATM network , a major tool for preventing (73) is (74) control．When a host wants a new virtual (75) ,it must describe the traffic to be offered and the service expected．
A.interval
B.time
C.slot
D.delay
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