Page 1 : Network of Networks, , Connecting to the Internet, , There are mainly three ways of connecting to the, , Internet, which are as follows:, , Dial-up Connection, , It is a temporary connection, set up between your, computer and ISP server., , Dial-up connection uses the telephone line (Public, Switched Telephone Network (PSTN) and modem to, connect to the Internet. The modem connects the, computer through the standard phone lines, which serves, as the data transfer medium. When a user initiates a, dial-up connection, user needs to enter the password and, specify a username and modem dials a phone number of, an Internet Service Provider (ISP) that is designated to, receive dial-up calls., , DSL broadband service providers in India are BSNL,, Airtel, Reliance, MTNL and Tata Indicom etc., , The ISP then establishes the connection, which usually, takes about 10 sec and is accompanied by several beeping, and buzzing sounds., , , , Telephone Une) [ Intemet Service, =——Se Provider (ISP), =, , , , Dial-up Connection, , Broadband Connection, , The term broadband commonly refers to high speed, , Internet access that is always ON and faster than the, traditional dial-up access. It is the short form of, , broadband width, that uses a telephone line to co, , the Ir, , NNect to, , nternet. Speed of broadband connection js Measure, , in Mbps (Megabits per Second), Broadband access all, , users, stand, , to connect to the Internet at greater speed than 4, ard 256 Kbps (Kilobits per Second) modem or dial,, , access. Broadband access requires the use of a broadbang, modem,, , Broad, , hand includes several high speed transmission, , technologies, which are as follows:, , (i), , (ii), , (iii), , Digital Subscriber Line (DSL) It is a, broadband connection which provides Interne, by transmitting digital data over the wires of, telephone network. It uses the existing, telephone lines for Internet access., , A special modem is necessary in order to be able to Use, a DSL service over a standard phone line., , Faster forms of DSL, typically available to businesses ate, as follows:, , * High data rate Digital Subscriber Line (HDSL), , + Very High data rate Digital Subscriber Line (VHDs,, or VDSL), , * Asymmetrical Digital Subscriber Line (ADSL), + Symmetrical Digital Subscriber Line (SDSL), , Cable Modem This service enables cable operators tp, provide broadband using the same co-axial cables, that, deliver pictures and sound to your TV set. A cable, modem can be added to or integrated with a set-top box, that provides your TV set for Internet access. They, provide transmission speed of 1.5 Mbps or more., , Broadband over Power Line (BPL) It is the delivery of, broadband over the existing low and medium voltage, electric power distribution network. Its speed js, generally comparable to DSL and cable modem speeds,, BPL can be provided to homes using existing electrical, connections and outlets. It is also known as, power-band., , Popular, € Access, a local, OPper, , BPL is good for those areas where there are no broadband, connections, but power infrastructure exists. e.g. in rural, , areas., , , , , , + ARPANET was the world’s first operational packet switching], network., , Individuals and other companies access to the Internet., Internet Service Provider Is used to Join the Internet., Internet services typically provided by ISPs include Internet, access, Internet transit, domain name registration, wed, hosting, usenet service and colocation. ISP does not provide, e-mail address. e.g. MTNL, BSNL, Airtel etc., , ¢ ISP (Internet Service Provider) is a company that provides, «