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Switch

Switch是交換機,它的前身是網(wǎng)橋。交換機是使用硬件來完成以往網(wǎng)橋使用軟件來完成過濾、學習和轉(zhuǎn)發(fā)過程的任務。Switch速度比HUB快,這是由于HUB不知道目標地址在何處,發(fā)送數(shù)據(jù)到所有的端口。而Switch中有一張轉(zhuǎn)發(fā)表,如果知道目標地址在何處,就把數(shù)據(jù)發(fā)送到指定地點,如果它不知道就發(fā)送到所有的端口。這樣過濾可以幫助降低整個網(wǎng)絡(luò)的數(shù)據(jù)傳輸量,提高效率。但然交換機的功能還不止如此,它可以把網(wǎng)絡(luò)拆解成網(wǎng)絡(luò)分支、分割網(wǎng)絡(luò)數(shù)據(jù)流,隔離分支中發(fā)生的故障,這樣就可以減少每個網(wǎng)絡(luò)分支的數(shù)據(jù)信息流量而使每個網(wǎng)絡(luò)更有效,提高整個網(wǎng)絡(luò)效率。目前有使用Switch代替HUB的趨勢。
  • Xilix spartan 3E 旋轉(zhuǎn)編碼器接口,脈沖方向識別,AB脈沖濾波 Rotary Encoder Interface Demonstrates how to use the rotar

    Xilix spartan 3E 旋轉(zhuǎn)編碼器接口,脈沖方向識別,AB脈沖濾波 Rotary Encoder Interface Demonstrates how to use the rotary encoder portion of the rotary pushbutton Switch.

    標簽: Demonstrates Interface Encoder spartan

    上傳時間: 2014-12-21

    上傳用戶:aig85

  • 學生成績查詢系統(tǒng)

    學生成績查詢系統(tǒng),運用結(jié)構(gòu)體,struct ,sort ,Clrscr(),textcolor()函數(shù),用for()循環(huán)語句,Switch和ifelse作為條件測試語句。 程序?qū)崿F(xiàn)了學生成績查詢功能,有20個我們班學生的數(shù)據(jù)信息,每個包含: 學號 — num [10](字符串)、姓名(拼音)— name[25](字符串)、 性別 — sex(字符,M或W)、年齡 — age(整型)、 三門課程成績(高數(shù)、英語、計算機)— score [3 ](單精度)。設(shè)計一個系統(tǒng): 定義及輸出。用結(jié)構(gòu)體類型數(shù)據(jù)及其賦初值的方法把學生的數(shù)據(jù)送到結(jié)構(gòu)體數(shù)組中(第一個數(shù)據(jù)用自己的真實數(shù)據(jù),其它數(shù)據(jù)自定,但注意要是合法數(shù)據(jù)),然后把它們輸出顯示;計算并排序。計算每個學生三門課程的總分(sum,單精度)及平均分(aver,單精度,輸出一位小數(shù)),還有他們成績的排名,將包括所有數(shù)據(jù)的結(jié)構(gòu)體數(shù)組元素按總分從大到小的順序排序打印出來; 運行程序,進入主界面!可輸入1—輸出所有學生的成績,輸入2—計算和排列學生的成績,輸入3—查詢學生個人成績,輸入4—退出查詢。 在進行學生個人成績個人查詢可以實現(xiàn)多次查詢——進入學生個人查詢,輸入1回車實現(xiàn)多次查詢。 運行環(huán)境為TURBOC ,WINDOWSXP。

    標簽: 成績查詢系統(tǒng)

    上傳時間: 2014-01-01

    上傳用戶:cx111111

  • The TMS320VC5506/C5507/C5509A USB peripherals can be clocked from either the USB APLL or the USB DP

    The TMS320VC5506/C5507/C5509A USB peripherals can be clocked from either the USB APLL or the USB DPLL. Since the APLL is inherently more noise tolerant and has less long-term jitter than the DPLL, it is recommended that you Switch to it for any USB operations.

    標簽: USB peripherals the clocked

    上傳時間: 2014-01-01

    上傳用戶:yuzsu

  • 實現(xiàn)FPGA和上位機的串口通信

    實現(xiàn)FPGA和上位機的串口通信,里面由波特率發(fā)生器,移位寄存器,計數(shù)器,detecter,Switch,Switch_bus等功能塊綜合而成。

    標簽: FPGA 上位機 串口通信

    上傳時間: 2017-03-22

    上傳用戶:dongqiangqiang

  • Code was successfully implemented within ALtera FPGA with Quartus 6.0. It presents two polish own fe

    Code was successfully implemented within ALtera FPGA with Quartus 6.0. It presents two polish own female names: ULA and ALA whose are scrolling on the 4-columns crystal LED. When you press the Switch it will turn from ULA into ALA and continue scrolling.

    標簽: successfully implemented presents Quartus

    上傳時間: 2013-12-09

    上傳用戶:zjf3110

  • 有創(chuàng)新的4*4矩陣鍵盤

    有創(chuàng)新的4*4矩陣鍵盤,只用兩個Switch搞定,學單片機的朋友可以分享一下。

    標簽: 創(chuàng)新 矩陣鍵盤

    上傳時間: 2017-04-22

    上傳用戶:ccclll

  • This file is distributed in the hope that it will be useful, but WITHOUT * WARRANTY OF ANY KIND.

    This file is distributed in the hope that it will be useful, but WITHOUT * WARRANTY OF ANY KIND. * * Author(s): Ole Saether * * DESCRIPTION: * * Hello World program. Please note that this program runs the internal 8051 * on the default power up frequency of 4MHz. See ex3c.c for an example on how * to Switch to 16MHz. * * The functionality is the same as in ex1a.asm. * * COMPILER: * * This program has been tested with Keil V7.07a. * * $Revision: 3 $ *

    標簽: distributed WARRANTY WITHOUT useful

    上傳時間: 2017-05-17

    上傳用戶:515414293

  • This file is distributed in the hope that it will be useful, but WITHOUT WARRANTY OF ANY KIND.

    This file is distributed in the hope that it will be useful, but WITHOUT WARRANTY OF ANY KIND. Author(s): Ole Saether DESCRIPTION: nRF9E5 Hello World program. Please note that this program runs the internal 8051 on the default power up frequency of 4MHz. See ex3a.asm for an example on how to Switch to 16MHz. The functionality is the same as in ex1c.c. ASSEMBLER: You need as31.exe to assemble this program. It can be downloaded from this web page: http://www.pjrc.com/tech/8051/ $Revision: 4 $

    標簽: distributed WARRANTY WITHOUT useful

    上傳時間: 2017-05-17

    上傳用戶:wuyuying

  • public class month1{ public static void main(String [] args){ int month = 10 int days = 0 s

    public class month1{ public static void main(String [] args){ int month = 10 int days = 0 Switch(month){ case 1: days = 31 case 2: days = 28 case 3: days = 31

    標簽: public int String month1

    上傳時間: 2014-08-26

    上傳用戶:chenbhdt

  • Abstract七段顯示器在DE2可當成Verilog的console

    Abstract七段顯示器在DE2可當成Verilog的console,做為16進位的輸出結(jié)果。Introduction使用環(huán)境:Quartus II 7.2 SP1 + DE2(Cyclone II EP2C35F627C6)簡單的使用Switch當成2進位輸入,并用8位數(shù)的七段顯示器顯示16進位的結(jié)果。

    標簽: Abstract Verilog console DE2

    上傳時間: 2017-06-03

    上傳用戶:zhangyigenius

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