各種L2數(shù)據(jù)網(wǎng)具有不同的通信協(xié)議與幀結(jié)構(gòu),其網(wǎng)絡(luò)節(jié)點設(shè)備可以是各種類型的數(shù)據(jù)交換機(X.25、Fr、Ethernet和ATM等分組交換機);而L3數(shù)據(jù)網(wǎng)(IP網(wǎng)或internet)具有統(tǒng)一的TCP/IP通信協(xié)議和分組結(jié)構(gòu),全網(wǎng)采用統(tǒng)一格式的IP地址, 節(jié)點設(shè)備統(tǒng)一采用面向無連接的路由器。為便于理解,我們可以將L3數(shù)據(jù)網(wǎng)簡單地理解為構(gòu)建在L2數(shù)據(jù)網(wǎng)平臺上的一個路由器網(wǎng)。
標簽: 數(shù)據(jù)網(wǎng) 幀結(jié)構(gòu) 通信協(xié)議
上傳時間: 2013-12-23
上傳用戶:caiiicc
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation with no Invariant Sections, with no Front- Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled “GNU Free Documentation License”.
標簽: Permission distribute the document
上傳時間: 2016-11-30
上傳用戶:lxm
(1 . Higher Educati on Admissi on Committee Office of L ianyungang,L ianyungang 222006, China 2 . Modern Educati on Technique Center, Huaihai I nstitute of Technol ogy, L ianyungang 222005, China) Abstract: The outbreak ofARP cheating virus interferes with the nor mal functi oning of LAN. On the basis of thoroughly und standing of the p rinci p les, this paper analyzes the p rinci p les, pattern and classificati ons ofARP in details . And it also discu the tactics t o take strict p recauti ons ofARP Fr om t wo sides— — —the administrati on ofLAN and Client Host . The pur pose of the cussi on is t o guarantee the normal running of LAN users . Key words: virus p rinci p les LAN client host
標簽: ianyungang Committee Educati Admissi
上傳時間: 2013-12-23
上傳用戶:zhangyigenius
// 入口參數(shù): // l: l = 0, 傅立葉變換 l = 1, 逆傅立葉變換 // il: il = 0,不計算傅立葉變換或逆變換模和幅角;il = 1,計算模和幅角 // n: 輸入的點數(shù),為偶數(shù),一般為32,64,128,...,1024等 // k: 滿足n=2^k(k>0),實質(zhì)上k是n個采樣數(shù)據(jù)可以分解為偶次冪和奇次冪的次數(shù) // pr[]: l=0時,存放N點采樣數(shù)據(jù)的實部 // l=1時, 存放傅立葉變換的N個實部 // pi[]: l=0時,存放N點采樣數(shù)據(jù)的虛部 // l=1時, 存放傅立葉變換的N個虛部 // // 出口參數(shù): // Fr[]: l=0, 返回傅立葉變換的實部 // l=1, 返回逆傅立葉變換的實部 // fi[]: l=0, 返回傅立葉變換的虛部 // l=1, 返回逆傅立葉變換的虛部 // pr[]: il = 1,i = 0 時,返回傅立葉變換的模 // il = 1,i = 1 時,返回逆傅立葉變換的模 // pi[]: il = 1,i = 0 時,返回傅立葉變換的輻角 // il = 1,i = 1 時,返回逆傅立葉變換的輻角
上傳時間: 2017-01-03
上傳用戶:ynsnjs
POS is a Java® platform-based, mission-critical, ISO-8583 based financial transaction library/Framework that can be customized and extended in order to implement financial interchanges.
標簽: mission-critical platform-based transaction financial
上傳時間: 2013-12-15
上傳用戶:libenshu01
Fastreport for delphi2009 修改過程,現(xiàn)在CSDN上已有Fr 4.7.22 Fro delphi2009 下載。但對于綠色版delphi2009,安裝該包時總報找不到路徑。本文件通過在fastreport 根目錄添加delphi2009工程,及批處理,使得綠色版fastreport 也可以順利安裝Fastreport.
標簽: Fastreport delphi 2009 for
上傳時間: 2017-01-12
上傳用戶:123456wh
最優(yōu)化方法的一些基本算法的實現(xiàn):1,0.618法;2,牛頓法;3,改進牛頓法;4,Fr法;5,DFP法
標簽: 算法
上傳時間: 2013-12-04
上傳用戶:lvzhr
擇PCB板材必須在滿足設(shè)計需求和可量產(chǎn)性及成本中間取得平衡點。設(shè)計需求包含電氣和機構(gòu)這兩部分。通常在設(shè)計非常高速的PCB板子(大于GHz的頻率)時這材質(zhì)問題會比較重要。例如,現(xiàn)在常用的Fr-4材質(zhì),在幾個GHz的頻率時的介質(zhì)損(dielectric loss)會對信號衰減有很大的影響,可能就不合用。就電氣而言,要注意介電常數(shù)(dielectric constant)和介質(zhì)損在所設(shè)計的頻率是否合用。
上傳時間: 2017-04-29
上傳用戶:VRMMO
servlet api全解 This document is built From the HTML documentations available at java.sun.com. It is regularly updated, when new versions of original documentations become available. To download updates and many other WinHelp and HTMLHelp Java documentations for Free, visit Franck Allimant s web site : http://www.confluent.Fr/javadoc/indexe.html (in English) http://www.confluent.Fr/javadoc (in French)
標簽: documentations available document servlet
上傳時間: 2013-12-14
上傳用戶:784533221
nios cpu test code this code was generated by altera tool automatically. You can obtain this code From the SOPC builder
標簽: code this automatically generated
上傳時間: 2014-05-30
上傳用戶:ddddddos
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