Computer Notes

1. LAN – iqjk uke Local Area Network

2. WAN - iqjk uke Wide Area Network

3. MAN - iqjk uke Metropolitan Area Network

4. USR - iqjk uke Understanding Security Requirments

5. CPU :- (Central Processing Unit) dsUnzh; lalk/ku bdkbZ %& ;g dEI;wVj dk fnekx gksrk gSaA bldk eq[; dk;Z izksxzkeks dks fØ;kfUor djuk gSA

6. CU :- (Central unit) fu;U=.k bdkbZ

7. ALU :- ( Arithmetic Logic Unit) vadxf.krh; o rkfdZd bdkbZ %& ;g ;wfuV vadxf.krh; o rkfdZd fØ;k,¡ djus dk dk;Z djrh gSaA

8. RAM :- (Random Access Memory)

9. Rom :-  (Read Only Memory)

10.      PROM – Programmable Read Only Memory) bl eSeksjh esa  

     dsoy ,d ckj gh fy[kk tk ldrk gsA fdUrq ckj & ckj i<+k tk ldrk gSaA

11.      EPROM – (Erasable  Programmable Read Only Memory) bl eSeksjh esa vko’;drk gksus ij izksxzke feVk;k tk ldrk gSa vksj u;k izksxzke Mkyk tk ldrk gSaA bl eSeksjh dks feVkus ds fy, ijkcSxuh fdj.kks dk mi;ksx fd;k tkrk gSaA

12.      EEPROM - (Electrically Erasable  Programmable Read Only Memory) bl eSeksjh ea izksxzke dh vko’;rk gksus ij fo|qr rjaxks }kjk feVk;k tkrk gSaA vkSj u;k izksxzke mkyk tk ldrk gSaA

13.  Bit :- fcV & eSeksj dh lcls NksVh bdkbZ ¼ckbujh vad iz.kkyh esa bldk eku 0 vFkok 1 gksrk gSaA

14.  fuEcy (Nibble) :- 4 fcV ds lewg dks fuEcy dgrs gSaA 1 fuEcy esa & 4 fcV

15.  Byte ¼ckbV½ %& 8 fcV ds lewg dks ckbV dgrs gSaA 1 ckbV = 8 fcV

16.  fdyksckbV  (Kilobyte) – KB  1024 ckbV dk 1 fdyksckbV dgk tkrk gSaA 1 fdyksckbV = 1024 ckbV

17.  esxkckbV (Megabyte) – MB  1024 fdyksckbV dks 1 exkckbV dgk tkrk gSaA 1 esxkckbV esa & 1024 fdyksckbV

18.  xhxkckbV (Gegabyte) – GB 1024 esxkckbV dks 1 xhxkckbV dgk tkrk gSaA 1 xhxkckbV = 1024 esxkckbV

19.  VsjkckbV ( Terabyte) – TB 1024 xhxkckbV dks 1 VsjkckbV dgk tkrk gSaA 1 VsjkckbV = 1024 xhxkckbV

20.  IP – (Internet protocol)

21.  TCP – (Transmission Control protocol)

22.  VSNL – ¼fons'k lapkj fuxe fyfeVsM½

23.  MTNL - ¼egkuxj VsyhQksu fuxe fyfeVsM½

24.  DNS – (Domain Name system)  DNS loZZj ,d dEI;wVj gSaA tks Mksesu (Domain) uke dks ip ,Mªsl esa vuqokn djrk gSaAorZeku le; esa BSNL }kjk nks ek/;eks esa bUVjusV dh lsok miyC/k djkbZ tkrh gSaA

25.  PSTN – (Public switched Telephone Network)

26.  isDN – (integrated services Digutal Network)

27.  HTML – (Hyper Text Mark Up Language)