根据下面的文字资料回答 71～75 题In the following essay，each blank has fourchoices．Choose th

根据下面的文字资料回答 71～75 题 The Simple Network Management Protocol(SNMP)is an （1 ）protocol that facilitates the exchange of management information between （2 ）．It is part of the Transmission Control ProtocoL/Internet Protocol(TCP/IP)protocol suite. SNMP enables network（3 ）to manage network performance，find and sole network problems，and plan for（4 ）．An SNMP managed network consists of three key components：managed devices，（5 ），and networkmanagement systems．

第6题：文中（1 ）处正确的答案是（）。

A．Physical Layer

B．Link Layer

C．Network Layer

D．Transport Layer

the best answer and write down on the answer sheet．

Spread spectrum simply means that data is sent in（1 ）pieces over a number of the discrete frequencies available for use at any time in the specified range．Devices using（2 ） spread spectrum(DSSS)communicate by splitting each（3 ）of data into several parts and sending them concurrently on different（4 ），DSSS uses a lot of the available（5 ），about 22 megahertz(MHz)．

第71题：文中（1 ）处正确的答案是（）。

A．small

B．high

C．low

D．long

the most suitable one from the four choices and write down in the answer sheet．

Open Shortest Path First(OSPF)is a（1 ）routing algorithm that（2 ）work done on the OSI IS-IS intradomain routing protocol．This routing，as compared to distance-vector routing，requires（3 ）processing power．The Dijkstra algorithm is used to calculate（4 ）OSPF routing table updates only take place when necessary，（5 ）at regular intervals．

第6题：文中（1 ）处正确的答案是（）。

A．distance-vector

B．link-state

C．flow-based

D．selective flooding

the most suitable one from the four choices and write down in the answer sheet．A（1 ）is basically an end point of a communication link between two applications.Sockets that extend over a network connect two or more applications running on separate computer sat tached to the network．Asocket（2 ）twoaddresses：（3 ）．Sockets providea （4 ）communication channel between one or more systems.There are stream and datagram sockets separately using TCP and（5 ）．

第6题：文中（1 ）处正确的答案是（）。

A．program

B．UDP

C．socket

D．TCP

A.海关扣押了李某的货物，并且对李某处以罚款的行政处罚，违反了一事不二罚的原则

B.李某对扣押的行政处罚不服的，必须先提起行政复议 。

C.海关未告知李某对扣押货物的行为享有申请听证的权利，违反了法定程序，该行为 无效

D.扣押和罚款都属于财产罚

E.扣押属于财产性行政强制、执行性强制措施

oduce a clear,complete，consistent，and testable（1 ）of the technical requirements for the software produet．

During the requirements definition phase，the requirements deftnifion team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specificationof each function that the software must perform. and each（2 ）that it must meet．The starting point is usually a set of high-level requirements from the（3 ）that describe the project or problem．

In either case，the requirements definition team formulates an overall concept for the system and thedefines（4 ）showing how the system will be oPerated，publishes the system and operation concept documents，and conducts a system concept review(SCR).

Following the SCR，the team derives（5 ）requirements for the system from the highlevel requirements and the systern operations concept．Using structured or object-oriented analysis，the team specifies the software functions and algorithms needed to satisfy each detailedrequirements.

第71题：文中（1 ）处正确的答案是（）。

A．function

B．definition

C．specification

D．statement

A.4月2日甲的邮件

B.4月4日乙的回复

C.4月4日甲的回复

D.4月5日乙的回复

E.4月10日送电脑

e network to an identical network. One layer up we find bridgas and swiehes,which operate at data link layer. They can accept （2 ） , examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer,we have touters that can connect two netwoks. If two networks have（3 ）network layer,the router may be able to translate between the packet formats. In the transport layer we find transport gateway, which cart interface between the two transport connections. Finally, in the application layer, application gateways translate message（4 ）. As an example,gateways between Internet e-mail and X.400 e-mail must （5 ）the e-mail message and change various header fields.

第6题：文中（1 ）处正确的答案是（）。

A．reapers

B．relays

C．connects

D．modems

A.先左后右

B.先上后下

C.先内后外

D.先易后难

E.先阴角后阳角

A.数据链路

B.网络

C.传输

D.应用