Ch:2 Internet Services
Ch 2 : Internet Services
Different Types of Internet Connections
There are many ways a personal electronic device can
connect to the internet. They all use different hardware and each has a
range of connection speeds. As technology changes, faster internet
connections are needed to handle those changes. I thought it would be
interesting to list some of the different types of internet connections that are
available for home and personal use, paired with their average speeds.
Dial-Up (Analog 56K).
Dial-up access is cheap but slow. A modem (internal or
external) connects to the Internet after the computer dials a phone
number. This analog signal is converted to digital via the modem and sent
over a land-line serviced by a public telephone network. Telephone lines
are variable in quality and the connection can be poor at times. The
lines regularly experience interference and this affects the speed, anywhere
from 28K to 56K. Since a computer or other device shares the same line as
the telephone, they can’t be active at the same time.
DSL. DSL stands for Digital
Subscriber Line. It is an internet connection that is always “on”.
This uses 2 lines so your phone is not tied up when your computer is
connected. There is also no need to dial a phone number to connect.
DSL uses a router to transport data and the range of connection speed,
depending on the service offered, is between 128K to 8 Mbps.
Cable. Cable provides an
internet connection through a cable modem and operates over cable TV lines.
There are different speeds depending on if you are uploading data
transmissions or downloading. Since the coax cable provides a much
greater bandwidth over dial-up or DSL telephone lines, you can get faster
access. Cable speeds range from 512K to 20 Mbps.
Wireless. Wireless, or
Wi-Fi, as the name suggests, does not use telephone lines or cables to connect
to the internet. Instead, it uses radio frequency. Wireless
is also an always on connection and it can be accessed from just about
anywhere. Wireless networks are growing in coverage areas by the minute
so when I mean access from just about anywhere, I really mean it. Speeds
will vary, and the range is between 5 Mbps to 20 Mbps.
Satellite. Satellite accesses
the internet via a satellite in Earth’s orbit. The enormous distance that a
signal travels from earth to satellite and back again, provides a delayed
connection compared to cable and DSL. Satellite connection speeds are
around 512K to 2.0 Mbps.
Cellular. Cellular technology provides wireless Internet
access through cell phones. The speeds vary depending on the provider,
but the most common are 3G and 4G speeds. A 3G is a term that describes a
3rd generation cellular network obtaining mobile speeds of
around 2.0 Mbps. 4G is the fourth generation of cellular wireless
standards. The goal of 4G is to achieve peak mobile speeds of 100 Mbps but the
reality is about 21 Mbps currently.
Internet
Services Providers
An
Internet Service Provider (ISP) is a company that provides Internet access by
using copper, fiber, or even satellite communications to the customer. In this
lesson, we will cover exactly what an ISP is, how the ISP connects customers,
and what type of services the ISPs provide.
Definition
An Internet Service
Provider (ISP) is a company such as AT&T, Verizon, Comcast,
or BrightHouse that provides Internet access to companies, families, and even
mobile users. ISPs use fiber-optics, satellite, copper wire, and other forms to
provide Internet access to its customers.
The type of Internet
access varies depending on what the customer requires. For home use, cable or
DSL (digital subscriber line) is the perfect, affordable choice. The price of
home use can range anywhere from free to roughly $120 a month. The amount of
bandwidth is usually what drives the price. Bandwidth is the
amount of data that can be sent through an internet connection in a given
amount of time. The speed for home use usually varies from 14 kilobits per
second to 100 megabits per second. For large companies and organizations, their
bandwidth requirements may be 1 to 10 gigabits per second, which is both
insanely fast and expensive!Top Ten Internet Providers in India
· BSNL. With 53.15% of market share
and 2.32 million subscribers to its credit, BSNL Broadband services are
accessible on DSL technology on a national basis covering 198 cities. ...
- MTNL. ...
- Bharti Airtel. ...
- Hathway Cable. ...
- Tata Communications. ...
- You Telecom. ...
- Reliance Communications. ...
- Sify Broadband
What is Internet
and services of Internet?
Internet is the global computer network and is the interconnected network
by using a standardized communication protocol. It provide many information to
the users. Internet provide many services these services are
used for business, download files, interactions, marketing, etc.
The Internet services are :
- Web Services
- Communication Services
- World Wide web
- Video conferencing
- Chat Rooms,
- WWW-world wide web
- E-mail-through this you can deliver any idea,image,text,audio,video to anyone.
- News group-this allow debate on various issues.This is similar to e-mail.
- FTP(file transfer protocol-this is the only way to transfer large files between computers of internet users.
- Video/Voice communication like Skype
- Social networking sites
- Wikipedia
Internet
provide many benefits to our life that is: Improve our knowledge, Skill and
learning capacity, Banking , Billing , Address mapping, etc
