Internet service provider

Some companies help you get online.

These groups are called ISPs. They use many kinds of wires. Some wires go under the streets.

They can use phone lines too. Some use cables like for TV. These wires carry information to your home. This helps you use the web. Some companies also help you with email. They can even host websites. It is a big way to stay connected.

An Internet service provider, or ISP, is a company that helps you get online.

ISPs provide many services. They help you access the web. They can also host websites or manage email. Some ISPs are big businesses. Others are run by local communities or non-profits.

There are different ways to connect. Some use phone lines for dial-up. This is a slower way to connect. Other companies use cable wires or fiber optics. Fiber optics use thin glass strands to send data fast.

ISPs also connect to each other. A small ISP might pay a larger ISP for access. These larger companies are called transit ISPs. They act like big roads for data. They move information across cities or even under the ocean.

In the U.S., some programs help families pay for this service. The Affordable Connectivity Program gives discounts to some homes. This helps more people join the digital world.

An Internet service provider, or ISP, is an organization that helps people use the Internet.

They do more than just connect you to the web. Some ISPs provide web hosting or help you register a domain name. They can also manage email through mailbox services. These companies come in many different forms. Some are large commercial businesses. Others are owned by communities or run as non-profits. They are the essential link between your device and the digital world.

Connecting to the Internet happens in several steps. First, an access provider sends a signal to your home or office. They might use copper wires for dial-up or DSL. Many use cable television lines or fiber optics for faster speeds.

Fiber optics use thin glass strands to carry data. Once the signal reaches your house, it moves through different layers. It goes from an access network to an aggregation network. Finally, it reaches a core network or backbone to travel far away.

The Internet has a long history of change. It began as a network called ARPAnet for government research. In the 1980s, companies like CompuServe and AOL offered limited online services. Full access was not yet easy for everyone to get. The first commercial ISPs appeared in 1989 in the United States and Australia. A company called The World became the first commercial ISP in the US. It served its very first customer in Brookline, Massachusetts, in November 1989. By 1995, most restrictions on commercial use were finally removed.

ISPs also connect to each other using different tiers. Tier 3 ISPs often focus on serving regular customers. Tier 2 ISPs have larger networks but must pay Tier 1 ISPs for access. Tier 1 ISPs are the largest and sit at the top. These big networks use massive systems like DWDM to send data through fiber. They can even send data across oceans using submarine cables. Some data travels over 1,500 kilometers through ultra long haul transmission. This keeps the whole global network moving.

Connecting to the Internet is a big part of modern life. You might use a smartphone on a cellular network to get online. Or you might use a computer plugged into a wall. Some people use satellite Internet to connect from far away. In the United States, the Affordable Connectivity Program helps families pay for these services. Since December 31, 2021, it has offered discounts to many households. This makes it easier for more people to join the connected world.

An Internet service provider (ISP) is an organization that provides various services to help people access and manage the Internet. These organizations can be commercial businesses, non-profits, or community-owned entities. Beyond simple connectivity, ISPs offer services like domain name registration, web hosting, and colocation. They also manage mailbox services, which host email domains and provide storage for electronic mail.

By acting as a bridge, ISPs allow users to participate in the global digital network.

The process of connecting to the Internet involves a sequence of network layers. It begins with an access provider that connects directly to the end customer, such as a home or a business. This provider uses different technologies to send data, including copper wires for dial-up or Digital Subscriber Line (DSL) connections. For faster speeds, providers use cable modems or fiber optics. Fiber-to-the-home (FTTH) uses thin glass strands to transmit data through light.

Once the signal leaves the customer, it moves into an aggregation network. From there, it enters a core network, also known as a backbone, to travel long distances.

ISPs are classified into different types based on how they connect to the global network. Access providers are the most common type for everyday users, offering technologies like Wi-Fi, cellular, or satellite access. Mailbox providers focus on hosting email servers using protocols like Simple Mail Transfer Protocol (SMTP). Hosting ISPs provide specialized services like cloud computing or physical server operation. There are also virtual ISPs (VISPs), which are operations that purchase services from a wholesale ISP to serve their own customers.

The history of these providers shows how the Internet moved from research to public use. Originally, the network was known as ARPAnet and connected government labs and universities. In the 1980s, online services like CompuServe and America Online (AOL) offered limited features like email. The first true commercial ISPs emerged in 1989 in Australia and the United States. In the U.S., a company called The World became the first commercial ISP in Brookline, Massachusetts, serving its first customer in November 1989. By 1995, the decommissioning of NSFNET removed the last major restrictions on commercial traffic.

To move massive amounts of data, ISPs use a hierarchical tier system. Tier 3 ISPs usually focus on providing service to individual customers and businesses. They must purchase transit, or access to the rest of the Internet, from higher tiers. Tier 2 ISPs have larger networks and may engage in peering, which is a way to exchange traffic with other networks. Tier 1 ISPs sit at the top of the hierarchy and own massive networks. These top-tier providers use advanced systems like Dense Wavelength-Division Multiplexing (DWDM) to send data through optical fiber over huge distances.

Data transmission relies on both metro and long-haul networks to function. Metro networks handle traffic within a specific city or metropolitan area. Long-haul networks transport data across much larger distances, often using submarine cables under the ocean. Some systems are capable of ultra long-haul transmission, which covers distances exceeding 1,500 kilometers. To manage these connections, ISPs often use data centers that host "meet-me rooms" where different networks can connect to one another.

In recent years, the role of ISPs has been shaped by legal discussions regarding net neutrality. This concept involves whether ISPs should treat all internet traffic equally. In 2015, the U.S. Federal Communications Commission (FCC) ruled in favor of net neutrality by reclassifying broadband as a telecommunications service under Title II. This was intended to prevent providers from creating "fast lanes" for certain content. However, the policy changed again in 2018 when the FCC's network neutrality rules were repealed. These debates highlight how much influence ISPs have over how information moves through the digital world.