22-03-2011, 10:32 AM
Presented by:
RAJESH KUMAR
seminar Presentation.ppt (Size: 404.5 KB / Downloads: 67)
INTRIDUCTION TO BROAD BAND
Broadband is a faster way for you to gain access to the Internet and the sites or pages that you want to see. Broadband Internet offers high- speed Internet access - high speed in terms of data transmission, upload, and download times, and connectivity. If you compare broadband Internet with a regular dial-up connection, you certainly won’t like going back to the latter.
TYPES OF BROADBAND
Broadband includes several high-speed transmission technologies such as:
* Digital Subscriber Line (DSL)
* Cable Modem
* Fiber
* Wireless
* Satellite
* Broadband over Powerline (BPL)
EXPLANATION
1.Digital Subscriber Line (DSL)
DSL is a transmission technology that transmits data faster over traditional copper telephone lines already installed to homes and business. DSL based broadband provides transmission speeds ranging from several hundreds Kbps to millions of bits per second (Mbps).
The following are the types of DSL transmission technology:
(b) Asymmetrical Digital Subscriber Line: used primarily by residential customers, such as Internet surfers, who receive lot of data but do not send much. ASDN provides typically provides faster speed in downstream direction then the upstream direction.
(b) Symmetrical Digital Subscriber Line: used typically by businesses for services such as video conferencing. Speed of downstream and upstream traffic is equal
Cable modem:
Generally, it is available in markets where you have cable television access. It uses the same line that you receive television on. It is easily available and can be ordered through many cable television providers.
Fiber:
Fiber optics technology converts electrical signals carrying data to light and send the light through transparent glass fiber about the diameter of human hair. Fiber transmits data at speeds far exceeding current DSL or cable modem speeds, typically by tens or even hundreds of Mbps.
Wireless:
Wireless broadband connects a home or business to the Internet using radio link between the customer’s location and the service providers facility.
Satellite
Just a satellite orbiting the earth provide necessary links for telephone
and television services, they also provide links fro broadband. Satellite
Broadband is another form of wireless broadband, also useful for remote
Populated area.
Broadband over Powerline
BPL is the delivery of broadband over the existing low and medium
Voltage electric power distribution network. BPL speeds are comparable
to DSL and cable modem speeds. BPL can be provided to homes using
existing electrical connection and outlets
ADVANTAGES OF BROADBAND
1. It has a higher speed of data transmission. It has a higher
speed of data transmission. The data transmission speed is
more than 200kbps while that of dial-up of 56kbps.
2. There is quicker loading of pages and also easier downloading
of music and movies and other files. Chatting through web-cam
or video conferencing in real time mode is possible due to high
speed broadband Internet access.
3. There is no blocking of telephone and lines and you can use
Internet and telephone simultaneously.
4. Broadband is always ‘on’ therefore, you remains connected
for 24/7
5. Broadband services is billed according to its usage of planes,
not the time factor.
DISADVANTAGES:
1. Broadband connection are often times as twice costly as a dial-
up connection.
2. In order to access a broadband connection, you will also need
a NIC (Network Internet card).
3. Since your computer is always connected to the Internet, it
is possible that someone will try to access your computer