What is ISP | role of ISP

ISP (Internet Service Provider) 

1. ISPs is an organization that provide services for using, accessing, participating in the internet. ISPs may be organized in various forms, such as profitable, non-profit, commercial, private owned. 
2. First ISPs were established in Australia and United States in 1989. 
3. ISPs provide some Internet Services such as Internet access, Internet transit, domain name registration, web hosting, collocation (connection). 
4. In India internet services started on 15 Aug 1995 through VSNL (Videsh Sanchar Nigam Limited)

Different types of Internet Services Provider are as follows. 

• Access ISPs 
• Mailbox ISPs 
• Hosting ISPs
• Transit ISPs
• Virtual ISPs 
• Free ISPs 
• Wireless ISPs

Access ISPs- 

1. ISPs provide Internet access that employs a range of technologies to connect the user to their network. 
2. Satellite Internet access is provided by Wireless access. 
3. Hosting and email services are also provided by many access providers. 

Mailbox ISPs- 

1. An organization that provides services for hosting electronic mail domains with access to storage for mailboxes. 
2. Email servers are provided by a mailbox provider to send, receive, accept and store email for end users or other organizations. 

Hosting ISPs-

1. An email, web- hosts, or online storage services are provided by Internet hosting services. 
2. Internet hosting also provide virtual server, cloud services or physical server operation. 

Transit ISPs-

1. Internet Transit is a methodology used to provide data transfer between the computers on different networks. 
2. A large amount of bandwidth is provided by Transit ISPs for connecting hosts ISPs and access ISPs. 
3. Internet Transit enhances numerous networking functions, like downloading speed and browsing speed. 

Virtual ISPs- 

1. A virtual ISP is an operation that is used to purchase services from another ISP. 
2. A virtual ISP is sometimes called a wholesale ISP. 

Free ISPs- 

1. Free ISPs are the one that provides service with no charge, i.e. free. 
2. Most free ISPs display advertisements while the user is connected. 
3. Free ISPs are sometimes called as free nets, which run for nonprofit. 

Wireless ISPs- 

1. A Wireless ISPs are one which is based on wireless networking. 
2. A Wireless ISP is a Basic Service Set (BSS), which consist of one server and numerous stations. All stations are linked to that server by wireless. 

Role of ISP-

1. ISP is a medium that provides services to connect to the internet. It connect customers to the nearest internet gateway.
2. ISP provide a modem for dial up connection and connecting an information services to a users of the WWW.
3. ISP allows a user to use the services of electronic mail (e-mail).
4. ISP allows a user voice conversations via the internet.
5. ISP do protection from the spread of the virus by applying antivirus systems for his customers