An Internet service provider (ISP) is an organization that provides services allowing users to access the internet. ISPs connect customers' devices like PCs and smartphones to the internet. They provide interfaces between public networks and the internet, assigning users an access number, username, and password. Common types of ISPs include access providers that employ technologies like DSL and cable to connect users, hosting ISPs that offer email and web hosting, and transit ISPs that provide bandwidth between other ISPs. ISPs allow customers to have their own domain name rather than using the ISP's domain, and typically offer website management and high-speed connectivity.

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ISP
 ISP Stands for (Internet Services Provider).
 An Internet service provider (ISP) is an organization
that provides services for accessing and using the
Internet.
 Internet service providers may be organized in
various forms, such as commercial, community-
owned, non-profit, or otherwise privately owned .
 Internet services typically provided by ISPs include
Internet access, Internet transit, domain name
registration, web hosting, Usenet service, and
colocation
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ISP
 Internet Service Provider
 Specialized company that connects customers with
PCs and browser to the internet.
 Allow user to access the Internet via modem using a
voice telephone network or directly via cables.
 Provides an interface between the public phone
system and Internet digital phone lines, which carry
packets instead of voice conversation .
 The ISP gives you a software package, a user name
and password, and an access number to connect to
the Internet . Z,F,B,A,L

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 History:
 The Internet was developed as a network between
government research laboratories and participating
departments of universities. By the late 1980s, a
process was set in place towards public, commercial
use of the Internet. The remaining restrictions were
removed by 1995, 4 years after the introduction of the
World Wide Web.
 In 1989, the first ISPs were established in Australia and
the United States. In Brookline, Massachusetts, The
World became the first commercial ISP in the US.
 Its first customer was served in November 1989
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Classifications:
Access providers ISP1
Mailbox providers
Hosting ISPs
Free ISPs
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3
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Virtual ISPs
Transit ISPs
7 Wireless ISP
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 Access providers ISP:
 ISPs provide Internet access, employing a range of technologies
to connect users to their network. Available technologies have
ranged from computer modems with acoustic couplers to
telephone lines, to television cable (CATV), wireless Ethernet (wi-
fi), and fiber optics.
 For users and small businesses, traditional options include
copper wires to provide dial-up, DSL, typically asymmetric
digital subscriber line (ADSL), cable modem or Integrated
Services Digital Network (ISDN) (typically basic rate interface).
Using fiber-optics to end users is called Fiber To The Home or
similar names
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 Mailbox providers:
 A mailbox provider is an organization that provides
services for hosting electronic mail domains with
access to storage for mail boxes. It provides email
servers to send, receive, accept, and store email for
end users or other organizations.
 Many mailbox providers are also access providers.
 Hosting ISPs:
 Internet hosting services provide email, web-hosting,
or online storage services. Other services include
virtual server, cloud services, or physical server
operation.
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 Transit ISPs:
 Provide a large amounts of bandwidth needed to
connect hosting ISPs and access ISPs together.
 Virtual ISPs:
 Purchase services from other ISPs to allow customers
internet access.
 Free ISPs:
 provide services free of charge and often display
advertisements while users are connected.
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 Wireless ISP:
 A wireless Internet service provider (WISP) is
an Internet service provider with a network
based on wireless networking. Technology
may include commonplace Wi-Fi wireless
mesh networking, or proprietary equipment
designed.
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ISP
 ISPs provide:
 Virtual hosting ( virtual domain ):- a company
with its own domain name, hosted by an
ISP to conduct business via the internet.
 Domain name: a company’s identifier in
cyberspace.
 Allow you to have your own domain name
such as www.yourcompany.com
 Rather than using your ISPs domain name
www.isp.com/yourcomany/
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 Most of organizations turn to ISPs for the following:
1. Companies need a full time stuff and webmaster
to handle day to day changes and enhancement
to the site
2. ISPs generally provide free management for
websites, such as security, and backup
3. ISPs have high speed connectivity
T1 and T3 lines to main Internet hubs
 T1 line transmit long distance data at 1.5 megabits (
million bits) per second.
 T3 line with capability of transmitting 44.7 MBit per
second.
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