The Internet allows computers, network-enabled devices or entire networks to access the Internet. The service comes from an internet service provider (ISP) and requires, depending on the access technology, a special access device or it can be used directly by terminal devices. In the broadband environment, a router is usually required, which makes a connection to the Internet and connects local devices via a LAN cable or Wi-Fi.
There are various tariffs for Internet connections of different types. While flat rates tariffs allow Internet use at a flat rate, volume or time-based billing models are also available.
For devices to communicate via the Internet every Internet connection requires a public Internet address, a so-called IP address. As the number of addresses is limited, techniques such as Network Address Translation (NAT) are often used, whereby multiple devices use a public address at the same time.
Various services can be accessed from each Internet connection. In addition to data transfer and surfing the net, other services, such as email, video, voice-over-IP and many other applications are available. Some providers also offer their customers television via the Internet (IPTV).