Internet service provider
Internet Service Provider (ISP) refers to an organization that provides access to and use of the Internet. Internet service companies can vary.
Such as commercial, socially owned, non-profit, or otherwise privately owned.
Internet services provided by the ISP may include Internet access, Internet transit, domain name registration, web hosting, Usenet services, and collocation (one such data center).
Access provider ISP
ISPs provide Internet access, connecting users to networks using a variety of technologies.
These technologies include computer modems connected to the telephone line, cable television (CATV), wireless Ethernet (Wi-Fi) and fiber optics.
The traditional method of copper is used for dial-up, DSL, ADSL, modem or IDSL only for users and small business owners. For users, using Fiber Optics is called Fiber to Home or such.
Customers who are in high demand, such as medium to large business or other ISPs – can use more high-speed DSL connections, Ethernet, Metropolitan Ethernet, Gigabit Ethernet, frame relay, ISDN primary rate interface, ATM and Sonnet.
Wireless access is another option. It has a cellular network or mobile network and satellite Internet access.
Mailbox providers are an organization that provides services for electronic mail domain hosting.
Electronic mail domain hosting comes with storage for mailboxes. These organizations provide users with the services of sending, receiving, and sending e-mail using their server.
Many mailbox providers also access providers, but some are not again (eg Yahoo, Outlook, Gmail, AOL Mail, PO Box).
There is an email hosting service covered under the explanation given in RFC 6650.
As well as the company, the university, the organization, the team or the person there is to manage their own mail server.
This is usually done by implementing the Simple Mail Transfer Protocol and accessing the message is provided through the Internet Message Access Protocol, post office protocol, webmail or a proprietary protocol.
Internet hosting service providers provide email, web-hosting or online storage services. Other services include virtual servers, cloud services, or direct server operations.
Just as ISPs pay their user’s access to the Internet, ISPs pay their upstream ISPs.
The upstream ISP consists of a network larger than the normal ISP. They can offer ISP benefits that they usually do not have.
Virtual ISP (VISP) is a process in which services are purchased from another ISP, sometimes called a wholesale ISP.
 In this process, VISP customers use the Internet provided by wholesale ISPs.
Ideal for VIPs, mobile virtual network operators, and local exchange carriers for communication.
Wireless Internet Service Provider means an Internet service provider that relies on wireless networking technology.
Those technologies may include simple Wi-Fi wireless mesh networking or proprietary equipment that is free 900 MHz, 2.4 GHz, 1.5, 1.2, 4.1, 4.1 and 2.5 GHz band. Or approved frequencies such as 2.5 GHz (EBS / BRS), 3.65 GHz and UFH band, LMDS.
No enforcement and intelligence assistance
In many countries, Internet service providers are legally required to allow law enforcement to monitor all or some of the data transmitted by the ISP.
Modern ISPs spread a number of technologies to monitor their networks, which allows all information to be passed to law enforcement or intelligence agencies and provide them with direct monitoring.