● 使用海明码进行纠错,7 位码长(x7x6x5x4x3x2x1),其中4 位数据,监督关系式为:
c0 = x1+x3+x5+x7
c1 =x2+x3+x6+x7
c2 =x4+x5+x6+x7
如果接收到的码字为1000101,那么纠错后的码字是___(58)___。
(58)A. 1000001 B. 1000101 C. 1001101 D. 1010101
● 层次化网络设计方案中,___(59)___是核心层的主要任务。
(59)A. 高速数据转发 B. 接入Internet
C. 工作站接入网络 D. 实现网络的访问策略控制
● 网络安全设计是保证网络安全运行的基础,网络安全设计有其基本的设计原则,以下关于网络安全设计原则的描述,错误的是___(60)___。
(60)A.网络安全的“木桶原则”强调对信息均衡、全面地进行保护
B.良好的等级划分,是实现网络安全的保障
C.网络安全系统设计应独立进行,不需要考虑网络结构
D.网络安全系统应该以不影响系统正常运行为前提
● 在Windows 操作系统中可以通过安装___(61)___组件创建Web 站点。
(61)A.IIS B.IE C.WWW D.DNS
● 802.11a 工作在全球通用的___(62)___ISM 频段,最高数据速率可达___(63)___。
(62)A. 1 GHz B. 2.4GHz C. 5GHz D. 10 GHz
(63)A. 1Mbps B. 11Mbps C. 54Mbps D. 100Mbps
● 我国自行研制的移动通信3G 标准是___(64)___。
(64)A. TD-SCDMA B.WCDMA C. CDMA2000 D. GPRS
● “<title style="italic">science</title>”是一个XML 元素的定义,其中元素标记的属性值是___(65)___。
(65)A.title B.style C.italic D.science
● Originally introduced by Netscape Communications,___(66)___ are a general mechanism which HTTP Server side applications, such as CGI (67) , can use to both store and retrieve information on the HTTP ___(68)___ side of the connection. Basically, Cookies can be used to compensate for the ___(69)___ nature of HTTP. The addition of a simple, persistent, client-side state significantly extends the capabilities of WWW-based ___(70)___ .
(66)A. Browsers B. Cookies C. Connections D. Scripts
(67)A. graphics B. processes C. scripts D. texts
(68)A. Client B. Editor C. Creator D. Server
(69)A. fixed B. flexible C. stable D. stateless
(70)A. programs B. applications C. frameworks D. constrains
● WebSQL is a SQL-like ___(71)___ language for extracting information from the web. Its capabilities for performing navigation of web ___(72)___ make it a useful tool for automating several web-related tasks that require the systematic processing of either all the links in a ___(73)___ , all the pages that can be reached from a given URL through ___(74)___ that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common ___(75)___ Interface.
(71)A. query B. transaction C. communication D. programming
(72)A. browsers B. servers C. hypertexts D. clients
(73)A. hypertext B. page C. protocol D. operation
(74)A. paths B. chips C. tools D. directories
(75)A. Router B. Device C. Computer D. Gateway
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