Introduction to ISP
Surfing Internet is the essential part of every person's life nowadays, doesn't matter whatever you are and whatever you do. Doesn't mater either you are businessman or a student, schoolteacher or a doctor Internet has its influence on every one of you and all the others.
It is important to connect with Internet in order to surf it. So you have to first connect with some ISP to access Internet. Here you should know what does an ISP means.
What is ISP?
Internet Service Provider, A company that provides access to the Internet. Before you can connect to the Internet you must first establish an account with an ISP.
So what should be prime importance in choosing ISP? First determine your needs, what services and features do you actually expect.
Available Access Methods
Currently it is the traditional connection method for the Internet This method uses a modem and standard telephone line. Because dial-up access uses normal telephone lines, the quality of the connection is not always good and data rates are limited making it slower than modern broadband methods. The maximum speed does not exceed 56Kbps.
ISDN (Integrated Services Digital Network)
It is an international standard for end-to-end digital transmission of voice, data, and signaling. In a videoconference, it is a system that provides simultaneous voice, video, and text transmission between individual desktop videoconferencing systems and group (room) videoconferencing systems. It utilizes existing telephone lines. ISDN allows 64Kbps on a single channel. Two channels can be combined for a maximum of 128Kbps.
DSL (Digital Subscriber Line)
A family of digital telecommunications protocols designed to allow high-speed data communication over the existing copper telephone lines between end-users and telephone companies. DSL integrates regular phone service and Internet access utilizing a DSL hub. This system allows for an "always connected" situation. Speeds can vary between 256Kbps and 640Kbps. A factor that may limit your maximum speed is your physical distance from a telephone company central office.
A modem designed to operate over cable TV lines. Because the coaxial cable used by cable TV, provides much greater bandwidth than telephone lines, a cable modem can be used to achieve extremely fast access to the Internet. Cable bandwidth is a very fast and typically reliable choice for Web cam systems if the upstream speeds are not significantly restricted. Speeds here can exceed 1.5Mbps, but as more people in an area join the cable access network, speeds may diminish as everyone is sharing the same maximum bandwidth.
A T1 is a very specialized telecommunications circuit that does not work over normal telephone lines. It has been popular in many businesses for many years. It is divided into 24 channels that can be used for many different purposes. This symbol represents a transmission bit rate of 1.544 million bits per second. It is equivalent to the ISDN transmission rate.