10 2009 档案

用碎玻璃“洗脸”的奇人

摘要：34岁的巴西杂耍艺人马科斯·安提奥尼诺·达·卢兹具有一门绝活，他能在一堆碎玻璃上打滚、跳舞，甚至拿碎玻璃“洗脸”。每当他捧起地下一堆碎玻璃渣往脸上用力“搓洗”之时，总会引起围观的群众一片惊叹声。马科斯时而在碎玻璃上赤脚跳舞，时而让人用碎酒瓶子狠扎他的身体，时而裸身俯卧在碎玻璃上，然后让两名壮汉踩在他的背上，以增加压力。马科斯坦言：“其实一开始我也受过伤，身上好几次被锋利的玻璃割得皮开肉绽。可是慢慢地，我终于琢磨出了门道。”马科斯15岁拜师学艺，从事街头表演已经长达19年，足迹走遍巴西的里约热内卢、圣保罗以及阿根廷首都布宜诺斯艾利斯等地，名声响遍整个南半球 阅读全文

posted @ 2009-10-28 13:22 严武 阅读(168) 评论(0) 推荐(0) |

c# SQL函数整理

摘要：1.一个月第一天的 Select DATEADD(mm, DATEDIFF(mm,0,getdate()), 0) 2.本周的星期一 Select DATEADD(wk, DATEDIFF(wk,0,getdate()), 0) 3.一年的第一天 Select DATEADD(yy, DATEDIFF(yy,0,getdate()), 0) 4.季度的第一天 Select DATEADD(qq, DATEDIFF(qq,0,getdate()), 0) 5.当天的半夜 Select DATEADD(dd, DATEDIFF(dd,0,getdate()), 0) 6.上个月的最后一天 Sele 阅读全文

posted @ 2009-10-25 23:04 严武 阅读(369) 评论(0) 推荐(0) |

基于B/S结构与C/S结构结合的新体系结构

摘要：摘要：在对B／S结构和C／S结构进行充分分析比较的情况下，简述了今后发展的前景，并提出了一种新的体系结构。结合B／S与C／S，将组件技术COM+和AcdveX技术分别应用在服务器端和客户端，从而开发出高效、安全的应用系统。关键词：C／S B／S MIS近年来，随着网络技术不断发展，尤其是基于Web的信息发布和检索技术、Java计算技术以及网络分布式对象技术的飞速发展，导致了很多应用系统的体系结构从C／S结构向更加灵活的B／S多级分布结构演变，使得软件系统的网络体系结构跨入一个新阶段。认识这些结构的特征，并根据实际情况进行系统的选型，对于成功开发一个MIS系统是非常关键的。1 C／S结构与B／S 阅读全文

posted @ 2009-10-25 23:02 严武 阅读(484) 评论(0) 推荐(0) |

基于 ? 架构的系统设计

摘要：第一、什么是C/S结构。C/S（Client/Server）结构，即大家熟知的客户机和服务器结构。它是软件系统体系结构，通过它可以充分利用两端硬件环境的优势，将任务合理分配到Client端和Server端来实现，降低了系统的通讯开销。目前大多数应用软件系统都是Client/Server形式的两层结构，由于现在的软件应用系统正在向分布式的Web应用发展，Web和Client/Server应用都可以进行同样的业务处理，应用不同的模块共享逻辑组件；因此，内部的和外部的用户都可以访问新的和现有的应用系统，通过现有应用系统中的逻辑可以扩展出新的应用系统。这也就是目前应用系统的发展方向。传统的C／S体系结 阅读全文

posted @ 2009-10-25 22:58 严武 阅读(279) 评论(0) 推荐(0) |

CCNA3 Chapter 8

摘要：1 Which of the following states the 80/20 rule of end-to-end VLANs? 80% of network resources should be remote and 20% should be on the local VLAN. 80% of VLANs should be static and the remaining 20% should be dynamic. 80% of network traffic should be local and 20% remote. √ 80% of the network so... 阅读全文

posted @ 2009-10-23 23:36 严武 阅读(381) 评论(0) 推荐(0) |

CCNA 3 Chapter 7

摘要：This item references content from the following areas:CCNA Exploration7.1.2 Wireless LAN Standards Assessment Item:Which two conditions have favored adoption of 802.11g over 802.11a? (Choose two.)802.11a suffers from a shorter range than 802.11g. The 2.4 GHz frequency band is not as crowded as the 5 阅读全文

posted @ 2009-10-23 23:29 严武 阅读(325) 评论(0) 推荐(0) |

CCNA 3 Chapter 6

摘要：This item references content from the following areas:CCNA Exploration6.1.2 Interfaces and Subinterfaces Assessment Item:Refer to the exhibit. Which three statements describe the network design shown in the exhibit? (Choose three.)This design will not scale easily. The router merges the VLANs into a 阅读全文

posted @ 2009-10-23 23:28 严武 阅读(353) 评论(0) 推荐(0) |

CCNA 3 Chapter 5

摘要：This item references content from the following areas:CCNA Exploration5.1.2 Issues with Redundancy Assessment Item:Refer to the exhibit. All switches in the network have empty MAC tables. STP has been disabled on the switches inthe network. How will a broadcast frame that is sent by host PC1 be hand 阅读全文

posted @ 2009-10-23 23:26 严武 阅读(363) 评论(0) 推荐(0) |

CCNA 3 Chapter 3

摘要：This item references content from the following areas:CCNA Exploration3.1.1 Introducing VLANs Assessment Item:Which two statements describe the benefits of VLANs? (Choose two.)VLANs improve network performance by regulating flow control and window size. VLANs enable switches to route packets to remo 阅读全文

posted @ 2009-10-23 23:25 严武 阅读(341) 评论(0) 推荐(0) |

CCNA 3 Chapter 4

摘要：This item references content from the following areas:CCNA Exploration4.2.2 VTP Domains Assessment Item:Which statement is true when VTP is configured on a switched network that incorporates VLANs?VTP is only compatible with the 802.1Q standard. VTP adds to the complexity of managing a switched netw 阅读全文

posted @ 2009-10-23 23:25 严武 阅读(435) 评论(0) 推荐(0) |

CCNA 3 Chapter 2

摘要：item references content from the following areas: CCNA Exploration2.1.1 Key Elements of Ethernet/802.3 Networks Assessment Item:When a collision occurs in a network using CSMA/CD, how do hosts with data to transmit respond after the backoffperiod has expired?The hosts return to a listen-before-trans 阅读全文

posted @ 2009-10-23 23:23 严武 阅读(426) 评论(0) 推荐(0) |

CCNA 3 Chapter 1

摘要：This item references content from the following areas:CCNA Exploration1.1.1 The Hierarchical Network Model Assessment Item:Which layer of the hierarchical network design model is refered to as the high-speed backbone of the internetwork,where high availability and redundancy are critical?access laye 阅读全文

posted @ 2009-10-23 23:20 严武 阅读(283) 评论(0) 推荐(0) |

CCNA 3 练习题和答案 Chapter 1

摘要： 阅读全文

posted @ 2009-10-23 22:03 严武 阅读(251) 评论(1) 推荐(0) |

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