• pim通用规则

    pim通用规则1:无论何时之创建一个(S,G)项而相应的父(*,G)项存在,就首先自动创建新的(*,G)项。 pim通用规则2:rpf接口是作为对源ip地址(或稀疏模式(*,G)项,rp)的最小开销路径接口(基于管理距离/cost)来估算的。如果多个接口 cost相同,选择最高ip地址的接口作为"切...

    2008-02-22 12:37:38

  • PIM-SM多点传送路由协议

    该文介绍了PIM-SM多点传送路由协议,主要介绍第二版。本文主要面向熟悉多点传送的信息技术管理员,要求他们在阅读PIM-SM RFC之前,对它有个概要的了解。PIM-SM的设计目的是帮助有效地管理广域网,在广域网里,组是稀疏地分布的。它使用了传统的IP多点传送模型(接收端启...

    2008-02-22 12:37:40

  • Media Gateway Control Protocol (MGCP) Technology

    Overview MGCP - Media Gateway Control Protocol - is the most important protocol in next- generation networks because it is responsible for implementing the migration from PSTN to IP telephony at large enterprises, ISPs, and carriers by converting to...

    2008-02-22 12:37:37

  • Multi-Protocol Label Switching (MPLS) Conformance

    Abstract Today抯 communication networks and services are migrating to a converged paradigm centered on IP (Internet Protocol). MPLS (Multi-Protocol Label Switching) has emerged as a key enabling technology for this migration. MPLS technology has pro...

    2008-02-22 12:37:40

  • Simple Network Management Protocol (SNMP)

    Chapter Goals Simple Network Management Protocol Background SNMP Basic Components SNMP Basic Commands SNMP Management Information Base SNMP and Data Representation SNMP Version 1 SNMPv1 and Structure of Management Information SNMPv1 and ASN.1 Data T...

    2008-02-22 12:37:36

  • Enhanced Interior Gateway Routing Protocol (EIGRP)

    Chapter Goals Identify the four key technologies employed by Enhanced IGRP (EIGRP). Understand the Diffusing Update Algorithm (DUAL), and describe how it improves the operational efficiency of EIGRP. Learn how to use EIGRP to interconnect networks w...

    2008-02-22 12:37:34

  • Internet Protocol version 6 (IPv6) Conformance and

    Contents : Abstract Introduction Benefits of IPv6 Improved efficiency in routing and packet handling Support for autoconfiguration and plug and play Support for embedded IPSec Enhanced support for Mobile IP and mobile computing devices Elimination...

    2008-02-22 12:37:32

  • 802.11协议族简介

    802.11a 高速WLAN协议,使用5G赫兹频段。 最高速率54Mbps,实际使用速率约为22-26Mbps 与802.11b不兼容,是其最大的缺点。也许会因此而被802.11g淘汰。 802.11b 目前最流行的WLAN协议,使用2.4G赫兹频段。 最高速率11Mbps,实际使用速率根据距离和信号强度可变 (150米...

    2008-02-22 12:37:31

  • TCP/IP协议栈在嵌入式异构网络中的应用(1)

    Internet现已成为社会重要的信息流通渠道。如果嵌入式系统能够连接到Internet上面,则可以方便、低廉地将信息传送到几乎世界上的任何一个地方。可以预言,嵌入式设备与Internet的结合代表着嵌入式系统和网络技术的真正未来。随着IPv6的应用,设备都可能获得一个全球唯...

    2008-02-22 12:37:29

  • IP地址信息查询(WHOIS)服务的原理

    RFC812 定义了一个非常简单的Internet信息查询协议——WHOIS协议。其基本内容是,先向服务器的TCP端口43建立一个连接,发送查询关键字并加上回车换行,然后接收服务器的查询结果。 世界上各级Internet管理机构秉承公开、公正、共享的原则,设立了可以查知IP地址和域名...

    2008-02-22 12:37:28

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