What Is ADSL? Asymmetric Digital Subscriber Line

ADSL (Asymmetric Digital Subscriber Line) is a technology for transmitting digital information at a high bandwidth on existing phone lines to homes and businesses. Unlike regular dialup phone service, ADSL provides continously-available,  an "always on" connection. ADSL is asymmetric in that it uses most of the channel to transmit downstream to the user and only a small part to receive information up from the user. ADSL simultaneously accommodates analog (voice) information on the same line. ADSL is generally offered at downstream data rates from 512 Kbps to about 6 Mbps. A form of ADSL, known as Universal ADSL or G.lite, has been approved as a standard by the ITU-TS.

ADSL was specifically designed to exploit the one-way nature of most multimedia communications in which large amounts of information flows toward or downloads the user and only a small amount of interactive control information upward is returned.

Several experiments with ADSL to real users began in 1996. In 1998, wide-scale installations began in several parts of the U.S. In 2000 and beyond, ADSL and other forms of DSL are expected to become generally available in urban areas. With ADSL (and other forms of DSL), telephone companies are competing with cable companies and their cable modem services.
Related Keywords (ex: ADSL Annex, ADSL Card, etc)
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How To Bluetooth Works

Bluetooth is is considered to be for 'personal' networking. This allows enough distance to perhaps communicate across your office, but not any further. It’s designed to be compatible across a range of very different operating systems and devices, including things that you would not normally think of as being 'computer' type items - for example, some types of headset. Bluetooth networking can enable the headset to connect with other devices such as your computer, phone, MP3 player or PDA. It is probably better from a health point of view to have a very low powered headset close to your head than it is to have a phone that might be generating 100 or even 300 times as much radio energy close to your head. For best compatibility, devices should support the Bluetooth 1.1 standard
By: sundarban

Plasma Television Advantages

The plasma television has many advantages and benefits for you and your entertainment needs and wants. The plasma TV gives you incredible picture quality, it has a sleek design, and it is HDTV compatible. It provides sharper images, more vibrant colors and has higher resolution than most standard TV sets... Plasma screen televisions provide sharp, clear pictures, plus no image distortion. CRTs can't match this. Plasma TVs have brighter pictures and provides an amazing 160-degree viewing area, than LCDs.

Plasma display televisions have screens that are completely flat. There is no distortion of the image even at the edges and corners. It can hang on almost any wall. You can even hang them from your ceiling. Other advantages of plasma screen TVs are high ambient light tolerance, distortion free images, entirely digital technology, not affected by magnetism, and can be attached to a ceiling or wall, or used as a freestanding fixture. For the best technology in display panels, choose plasma technology.

By: Ethel G

What Is ADSL? Asymmetric Digital Subscriber Line

ADSL (Asymmetric Digital Subscriber Line) is a technology for transmitting digital information at a high bandwidth on existing phone lines to homes and businesses. Unlike regular dialup phone service, ADSL provides continously-available,  an "always on" connection. ADSL is asymmetric in that it uses most of the channel to transmit downstream to the user and only a small part to receive information up from the user. ADSL simultaneously accommodates analog (voice) information on the same line. ADSL is generally offered at downstream data rates from 512 Kbps to about 6 Mbps. A form of ADSL, known as Universal ADSL or G.lite, has been approved as a standard by the ITU-TS.

ADSL was specifically designed to exploit the one-way nature of most multimedia communications in which large amounts of information flows toward or downloads the user and only a small amount of interactive control information upward is returned.

Several experiments with ADSL to real users began in 1996. In 1998, wide-scale installations began in several parts of the U.S. In 2000 and beyond, ADSL and other forms of DSL are expected to become generally available in urban areas. With ADSL (and other forms of DSL), telephone companies are competing with cable companies and their cable modem services.
Related Keywords (ex: ADSL Annex, ADSL Card, etc)
annex
broadband
cable
card
channel
digital
discs
ethernet
gateway
ima
interface
isdn
lan
line
modem
module
network
over
port
pots
power
router
service
side
smartnet
splitter
term
unit
wan
wireless

 

How To Bluetooth Works

Bluetooth is is considered to be for 'personal' networking. This allows enough distance to perhaps communicate across your office, but not any further. It’s designed to be compatible across a range of very different operating systems and devices, including things that you would not normally think of as being 'computer' type items - for example, some types of headset. Bluetooth networking can enable the headset to connect with other devices such as your computer, phone, MP3 player or PDA. It is probably better from a health point of view to have a very low powered headset close to your head than it is to have a phone that might be generating 100 or even 300 times as much radio energy close to your head. For best compatibility, devices should support the Bluetooth 1.1 standard
By: sundarban

Plasma Television Advantages

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The plasma television has many advantages and benefits for you and your entertainment needs and wants. The plasma TV gives you incredible picture quality, it has a sleek design, and it is HDTV compatible. It provides sharper images, more vibrant colors and has higher resolution than most standard TV sets... Plasma screen televisions provide sharp, clear pictures, plus no image distortion. CRTs can't match this. Plasma TVs have brighter pictures and provides an amazing 160-degree viewing area, than LCDs.

Plasma display televisions have screens that are completely flat. There is no distortion of the image even at the edges and corners. It can hang on almost any wall. You can even hang them from your ceiling. Other advantages of plasma screen TVs are high ambient light tolerance, distortion free images, entirely digital technology, not affected by magnetism, and can be attached to a ceiling or wall, or used as a freestanding fixture. For the best technology in display panels, choose plasma technology.

By: Ethel G

Computer Firewall Basic Concepts

A firewall is a system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets.  All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.

There are several basic types of firewall technologies:

• Packet filter: Looks at each packet entering or leaving the network and accepts or rejects it based on user-defined rules. Packet filtering is fairly effective and transparent to users, but it is difficult to configure. In addition, it is susceptible to IP spoofing.


• Application gateway: Applies security mechanisms to specific applications, such as FTP and Telnet servers. This is very effective, but can impose a performance degradation.


• Circuit-level gateway: Applies security mechanisms when a TCP or UDP connection is established. Once the connection has been made, packets can flow between the hosts without further checking.


• Proxy server: Intercepts all messages entering and leaving the network. The proxy server effectively hides the true network addresses.

In practice, many firewalls use two or more of these technologies together. A firewall is considered a first line of defense in protecting private information. For greater security, data can be encrypted.

Related Brands
Barracuda Networks
Cisco Systems
Trend Micro
Sonicwall
Juniper Networks
Nokia
Nortel
Watchguard

Computer Firewall Basic Concepts

A firewall is a system designed to prevent unauthorized access to or from a private network. Firewalls can be implemented in both hardware and software, or a combination of both. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets.  All messages entering or leaving the intranet pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria.

There are several basic types of firewall technologies:

• Packet filter: Looks at each packet entering or leaving the network and accepts or rejects it based on user-defined rules. Packet filtering is fairly effective and transparent to users, but it is difficult to configure. In addition, it is susceptible to IP spoofing.


• Application gateway: Applies security mechanisms to specific applications, such as FTP and Telnet servers. This is very effective, but can impose a performance degradation.


• Circuit-level gateway: Applies security mechanisms when a TCP or UDP connection is established. Once the connection has been made, packets can flow between the hosts without further checking.


• Proxy server: Intercepts all messages entering and leaving the network. The proxy server effectively hides the true network addresses.

In practice, many firewalls use two or more of these technologies together. A firewall is considered a first line of defense in protecting private information. For greater security, data can be encrypted.

Related Brands
Barracuda Networks
Cisco Systems
Trend Micro
Sonicwall
Juniper Networks
Nokia
Nortel
Watchguard

Steps To Follow After You Purchase A New Printer

There are several important things to consider after purchasing new printer/s. First things first, one must make sure to check the unit for physical defects when the printer is taken out from the box. If you find something, it is very important to immediately contact the store where you purchased the item for replacement. Next, find the warranty certificate and place it somewhere safe. The warranty will be very handy when problems eventually arrive. Another is to copy the serial numbers visible from the printer and copy the product number. Now we move on to the installation and testing. First, to do this with ease, check the box for the instruction manual and follow the steps/procedures indicated. Then install the driver so that you can maximize the features of your new printer. And lastly, print a copy in black and colored version to check its color accuracy.

Explanation About the VGA VGA stands for

Explanation About the VGA

VGA stands for Video Graphics Adapter, a function of the VGA card is to add graphics to your computer so it can display a maximum computer graphics and has a high resolution, VGA Card is required for you lovers of games or so-called gamers, due to the Game high quality is required of high-quality VGA card anyway. Similarly with your work or school or majoring in the field of Graphic Design, you must use a VGA card to a picture or graph that can be made up and the results of our work can be satisfying. But not only the VGA that you need but have no support from other device such as LCD Flat Monitor, Mother
By: Fathurahman