Page 60 - FUNDAMENTALS OF COMPUTER

60 Fundamentals of Computers NPP

a problem because a permanent copy is always Bggo H$moB© g_ñ`m Zht hmoVr Š`m|{H$ EH$ H$m°nr h_oem hmS>©
stored at secondary storage. RAM disk appears
as partitions of the Hard Disks. RAM Disk can {S>ñH$ _| n‹S>r hmoVr h¡Ÿ& RAM {S>ñH$, hmS>© {S>ñH$ Ho$
be supported from operating system or user nm{Q>©eZ Ho$ g_mZ H$m_ H$aVr h¡Ÿ& EH$ Am°naoqQ>J {gñQ>_
application process. No battery backup is RAM {S>ñH$ H$mo g_W©Z H$aVm h¡Ÿ& My±{H$ OmZH$mar AñWm`r
needed due to temporary nature of information. hmoVr h¡, Bg{bE {H$gr ~¡Q>ar H$s Amdí`H$Vm Zht hmoVr
When UPS is added entire system can
continuously run in case of power failure. RAM h¡Ÿ& UPS H$s _XX go H§$ß`yQ>a bJmVma H$m`© H$a gH$Vm
Disks are used to store both compressed and h¡Ÿ& RAM {S>ñH$ H§$àoñS> d AZH§$àoñS> XmoZm| Vah H$s
uncompressed files. \$mBb| ñQ>moa H$aVr h¡Ÿ&
The price of using a RAM Disk is higher RAM {S>ñH$ H$m _yë` hmS>© {S>ñH$ H$s VwbZm _| A{YH$
than that of secondary memory. RAM Disks hmoVm h¡Ÿ& EH$ do~ Ho$e H$mo ñQ>moa H$aZo _| BZH$m A{YH$
are frequently used for storing a web cache. It
improves speed of loading and provides Cn`moJ {H$`m OmVm h¡Ÿ& Bggo bmoS> H$aZo H$s J{V ~‹T>Vr h¡
security due to volatile nature of RAM Disk. VWm My±{H$ RAM {S>ñH$ dmînerb hmoVm h¡, AV: OmZH$mar
This feature is supported by various version of H$r gwajm H$s Ñ{ï> go ^r `h AÀN>m h¡Ÿ& DOS Am¡a UNIX
DOS and UNIX. NPP Am°naoqQ>J {gñQ>_ ao_ {S>ñH$ H$m g_W©Z H$aVo h¢Ÿ&
1.31 Webcam 1.31 do~H¡$_

Webcam stands for Web Camera: This is a do~-H¡$_ go VmËn`© h¡ do~-H¡$_amŸ: `h EH$ N>moQ>m
small camera whose images can be accessed by H¡$_am hmoVm h¡ {OgH$s úm_Vm hmoVr h¡ {H$ WWW (dëS>©
using world wide web. It is available in dmBS> do~) H$s _XX go Vñdra| co gHo$Ÿ& `h {ZåZ ê$nm| _|
following forms: CncãY hmoVm h¡:
Web-accessible Camera: This is a digital do~ EŠgo{g~c H¡$_am: `h EH$ {S>{OQ>c do~ H¡$_am
web camera which uploads images to web hmoVm h¡ Omo {H$gr gd©a _| B_oO H$mo AncmoS> H$a gH$Vm
server either continuously or at regular h¡Ÿ& `h cJmVma hmo gH$Vm h¡ `m Hw$N> g_` H$s Jon XoH$a
intervals. The camera can be directly attached hmo gH$Vm h¡Ÿ& `h EH$ Eogo H$åß`yQ>a na Ow‹S> gH$Vm h¡ Omo
to a PC working as a client. {H$ ŠcmB§Q> O¡gm H$m`© H$aVm h¡Ÿ&
Video conferencing Camera: It is also a {d[S>`mo H$m§\«§o$qgJ H¡$_am: `h EH$ N>moQ>m H¡$_am hmoVm
small camera connected to PC which allows h¡ Omo {H$ cJmVma H$B© Vñdra| co gH$Vm h¡, AV: Xmo `m
two or more persons on the Internet to view
continuous images and thus it provides with A{YH$ ì`{º$ _mBH«$mo\$moZ d ñnrH$a H$s _XX go Amng _|
the help of microphone and speaker video g{MÌ ~mVMrV H$a gH$Vo h¡Ÿ& Bgo {d[S>`mo H$m§\«§o$qgJ gw{dYm
conferencing facility. H$hVo h¡§Ÿ&
Close-Circuit TV Camera: Analog cameras ŠcmoO-g{H©$Q> TV H¡$_am: `h EH$ EZmcm°J H¡$_am
can be used to capture images. These cameras hmoVm h¡Ÿ& BgH$m Cn`moJ gwaúmm Ho$ H$maU hmoVm h¡Ÿ& EH$
are used for security purpose. A Video Capture {d[S>`mo H¡$ßMa H$mS>© H$m Cn`moJ H$aHo$ BÝh| BÝQ>aZoQ> go ^r
card can be used and can be connected to the
Internet. Omo‹S>m Om gH$Vm h¡Ÿ&