• 介绍NAT、NAPT的基本概念和工作原理及区别

    引言 近年来,随着Internet的迅猛发展,连入Internet的主机数量成倍增长。由于最初设计Internet的时候并没有考虑到需要支持这么大的规模,因而Internet使用的Ipv4协议中IP地址的长度选择了32位,它可以使IP包的格式很好地对齐;但是,目前IP地址的短缺已经成为Internet面临的最大问题之一

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  • 802[1].11 Wireless Networks - The Definitive Guide

    Chapter 1. Introduction to Wireless Networks Over the past five years, the world has become increasingly mobile. As a result, traditional ways of networking the world have proven inadequate to meet the challenges posed by our new collective lifestyle. If users must be connected to a network by physical cables, their movement is dramatically reduced. Wireless connectivity, however, poses no such restriction and allows a great deal more free movement on the part of the network user. As a result, wireless technologies are encroaching on the traditional realm of "fixed" or "wired" networks. This change is obvious to anybody who drives on a regular basis. One of the "life and death" challenges to those of us who drive on a regular basis is the daily gauntlet of erratically driven cars containing mobile phone users in the driver's seat. We are on the cusp of an equally profound change in computer networking. Wireless telephony has been successful because it enables people to connect with each other regardless of location. New technologies targeted at computer networks promise to do the same for Internet connectivity. The most successful wireless networking technology this far has been 802.11.

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  • 3G技术知识培训手册

    前 言 为做好3G引入前期的技术准备工作,进一步调动员工学习钻研3G技术的 积极性,最大限度地使员工掌握全面的3G相关技术知识,培养技术精、作风硬 的3G技术骨干队伍,不断提升中移动技术应用与创新的能力,增强企业核心竞 争力。在集团公司已经系统组织的3G技术知识培训基础上,集团公司技术部组 织相关部门编写了这本3G技术知识培训手册,便于全国的规划、建设、维护、 优化和支撑等技术人员进行3G技术知识的系统化学习。同时,该手册也是作为 集团公司即将举办的3G技术知识竞赛的培训读本。

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  • 3G技术详解

    一. 标准篇 1. 什么是第三代移动通信系统 答复: 第三代移动通信系统 IMT2000,是国际电信联盟(ITU)在1985 年提出的, 当时称为陆地移动系统(FPLMTS)。1996 年正式更名为IMT2000。与现有 的第二代移动通信系统相比,其主要特点可以概括为:

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  • 802.11n标准2009年正式版

    802.11n标准2009年正式版,完整英文版,描述详细

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  • 《C++编程思想》(Thinking in C++ )PDF | 资料

    学习C++最好的书籍、、、

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