2011年3月全国计算机四级网络工程师考试真题及答案

2011 年 3 月全国计算机四级网络工程师考试真题及答案一、选择题（每小题 1 分，共 40 分）下列各题 A）、B）、C）、D）四个选项中，只有一个选项是正确的，请将正确的选项涂写在答题卡相应位置上，答在试卷上不得分。(1) 按照 ITU 标准，传输速率为 155.520Mbps 的标准是A）OC-3 B）OC-12 C)OC-48 D)OC-192(2) 下列关于 RPR 技术的描述中，错误的是A)RPR 能够在 50ms 内隔离出现故障的节点和光纤段B)RPR 环中每一个节点都执行 SRP 公平算法C)两个 RPR 节点之间的裸光纤最大长度为 100 公里D)RPR 用频分复用的方法传输 IP 分组(3) 以下关于 IEEE802.16 协议的描述中，错误的是A)802.16 主要用于解决城市地区范围内的宽带无线接入问题B)802.16a 用于移动结点接入C)802.16d 用于固定结点接入D)802.16e 用于固定或移动结点接入(4) 下列关于 xDSL 技术的描述中，错误的是A)xDSL 技术按上行与下行速率分为速率对称与非对称两类B)ADSL 技术在现有用户电话线上同时支持电话业务和数字业务C)ADSL 上行传输速率最大可以达到 8MbpsD)HDSL 上行传输速率为 1.544Mbps(5) 下列关于服务器技术的描述中，错误的是A)对称多处理技术可以在多 CPU 结构的服务器中均衡负载B)集群系统中一台主机出现故障时不会影响系统的整体性能C)采用 RISC 结构处理器的服务器通常不采用 Windows 操作系统D)采用 RAID 技术可提高磁盘容错能力(6) 一台交换机具有 48 个 10/100Mbps 端口和 2 个 1000Mbps 端口，如果所有端口都工作在全双工状态，那么交换机总带宽应为外脚手架搭设，悬挂安全网，铺设跳板，进行层间封闭，外脚手架上垃圾及杂物的清理,外脚手架的日常围护，配合外装单位做好外脚手架的修改，及时清理外脚手架上垃圾及杂物 feelings survey, by looking up public sentiments to find problems. Problems will increase its special supervision, set up accounts, hold on to it. We should conscientiously implement the leading contracting matters, secured, had an answer to everything, then settles rate of 100%. Have an impact on some of the outstanding issues, supervision departments and information components together, play the supervisory role of the news media to promote problem solving. Investee 3. insist on a daily run, around the practice of truth catching efficiency, focus specification. To give full play to the party Office around connecting, coordinating internal and external features, contact, rally at all levels, to motivate every aspect, adhere to the truth, strengthening standardized management to achieve coherent, efficient and effective functioning of the daily work of the Party Committee. Is processing messages should strive to streamline, standardize and quality. Streamlining is to control the number of messages, compress messages, reducing procedures, improve message handling efficiency. Specifications, is to strictly enforce the ban issued by the Communist party authorities in document handling regulations and provincial and municipal regulations, conscientiously strengthen and improve communications management to ensure that party documents orderly. High quality, is to improve the quality of message processing, it is necessary to accurately implementing the intention of the Party Committee, clearance, good communications, policy program closed, ensuring that there is no error. Second meeting scheduled to ensure thorough, sa...