disk drive

DISK DRIVES
Disk Drive is used to read and write data on a disk.It has one or more read/write heads to read and write data.There are different types of disk drives for different types of disk.For example a floppy drive reads and writes data from floppy disk

SRAM AND DRAM

DIFFERENTIATE BETWEEN SRAM AND DRAM
DRAM holds its data dynamically .It doesnot hold it indefinitely.Each DRAM memory cell must be constantly refreshed to keep data in DRAM.
SRAM doesnot require refreshing .It holds the data indefinitely as long as computer remains on.

It is faster than DRAM but it is very complex 

memory

DIFFERENTIATE BETWEEN PRIMARY AND SECONDARY MEMORY
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Primary memory is expensive and small but secondary memory is inexpensive and large.Primary memory directly connects to CPU but Secondary mimory is not directly connected to CPU.
Primary memory provides faster data access but secondary memory provides slow data access

MULTIMEDIA

MULTIMEDIA
It is a combination of text ,audio,animations ,still images.It is run by information content precessing devices
such as computerized devices,It can also a part of live process.It has a broader scope than max media
It can be linear and non linear

Linear without naviagation control  such as cinema screen
Linear with control---------------  such as video game

Disadvnatages of BroadBand

DISADVANTAGES OF BROADBAND

Highly monthly charges

It can not support in rural and some distant areas

It can not work where PTCL facility is not available

Due to lack of firewall ,security risk is there for protection of computer

Advantages of BroadBand

ADVANTAGES OF BROADBAND
Following are main advantages of using BroadBand
1.Connection Speed Up to 100 times faster
2.It doesnot affect the phone line
3.This connection is always on
4.No special cable is required

MOBILE WIRELESS BROADBAND

MOBILE WIRELESS BROADBAND

Wireless broadband technology include service from mobile phone service such as AT &T Mobility 

This type of connection cna be stable in almost any area that could also receive a strong cell phone connection

The Iphone service in USA experienced the problem of heavy internet use more than any other providers

Smart Phone Customers use 40 % of the technology use

Iphone is a great achievment in the world of networking for proper and correct funcioning of network traffi

BROADBAND-WELCOMEIT

BROADBAND-INTRODUCTION
It refers to the bandwith of a transmission medium and its ability to transport multiple signals and traffic types at the same time.Medium can be in any kind of form e.g coaxial cable,optical fiber and twisted pair .
A baseband is a system in which information is transported across a single channel
Diap up Internet was the only way  by which one can access the internet and download files such as movies and songs
The cable modem is common use of broadband .If we have a broad band connection then we can download any thing much faster than dial up modem

Different criteria for "broad" have been applied in different contexts and at different times. Its origin is in physics, acoustics and radio systems engineering, where it had been used with a meaning similar to wideband. However, the term became popularized through the 1990s as a vague marketing term for Internet access.

WI-FI

WI-FI
WIRELESS FIDELITY

Wi-Fi  also spelled Wifi or WiFi) is a popular technology that allows an electronic device to exchange data wirelessly (using radio waves) over a computer network, including high-speed Internet connections. The Wi-Fi Alliance defines Wi-Fi as any "wireless local area network (WLAN) products that are based on the Institute of Electrical and Electronics Engineers' (IEEE) 802.11 standards" However, since most modern WLANs are based on these standards, the term "Wi-Fi" is used in general English as a synonym for "WLAN". Only Wi-Fi products that complete Wi-Fi Alliance interoperability certification testing successfully may use the "Wi-Fi CERTIFIED" trademark.

A device that can use WI-Fi  that can connect to a network resource such as the internet using wirless network access point such an access point has range of about 20 meters indoors and greater range outdoors

Hotspots range can comprise as area as  small as a single room with wallls that block radio waves

A device that can use Wi-Fi (such as a personal computer, video-game console,smartphone, tablet, or digital audio player) can connect to a network resource such as the Internet via a wireless network access point. Such an access point (or hotspot) has a range of about 20 meters (65 feet) indoors and a greater range outdoors. Hotspot coverage can comprise an area as small as a single room with walls that block radio waves or as large as many square miles — this is achieved by using multiple overlapping access points.

It can be less secure than wired connections because an intruder doesnot need a physical connectio ,web pages that use ssl are seure

EVO-SMART

EVO Smart Console 

EVO Smart Console (originally called Evo: Phase One) is a Media PC and game console marketed in the seventh generation era, and produced by Envizions. The beta, called EVO: Phase One, was released on October 20, 2006, and the introductory price was US$399. The final product was released on November 20, 2008, costing US$250. According to the company, it sold out.

The system uses Linux software, which is built using the Fedora operating system. The system came bundled with three games; SuperTux, Kobo Deluxe, and Kid Destiny. The Console also features high definition ,internet access and allows running windwosgames .It also has a built in hard drive and RAm

EVO-PTCL

EVO
PTCL (PAKISTAN TELECOMMUNICATION PVT LIMITED ) Introduced wirless Internet Facility after the old style internal dial up Modem,but it didnot produced the actual result as was expecting and after this PTCL introuduced DSL that worked and working fine but due to wired problem it caused a lot of problem but now PTCL has introduced the facility of EVO that works just like moble sim signal in different areas of the world and now it is working best 

wireless commmunication

Wireless communication 

is the transfer of information between two or more points that are not connected by an electrical conductor.

The most common wireless technologies use electromagnetic wireless telecommunications, such as radio. With radio waves distances can be short, such as a few metres for televisionremote control, or as far as thousands or even millions of kilometres for deep-space radio communications. It encompasses various types of fixed, mobile, and portable applications, including two-way radios, cellular telephones, personal digital assistants (PDAs), andwireless networking. Other examples of applications of radio wireless technology includeGPS units, garage door openers, wireless computer mice, keyboards and headsets,headphones, radio receivers, satellite television, broadcast television and cordless telephones.

wireless servis

WIRELESS COMMUNICATION MEDIA

Wireless Service

Wireless operations permit services, such as long-range communications, that are impossible or impractical to implement with the use of wires. The term is commonly used in the telecommunications industry to refer to telecommunications systems (e.g. radio transmitters and receivers, remote controls etc.) which use some form of energy (e.g. radio waves, acoustic energy, etc.) to transfer information without the use of wires.^[1] Information is transferred in this manner over both short and long distances.

It has very important role in establishing a well functioned networking environment for success