What is an Internet Service Provider (ISP)?

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.


Also an ISP can be defined as a  company that provides individuals and other companies access to the Internet and other related services such as Web site building and virtual hosting. An ISP has the equipment and the telecommunication line access required to have a point-of-presence on the Internet for the geographic area served. 


The Internet Service Providers play a very important role in ensuring that the ISP’s customers get the internet. The ISPs use a routing protocol know as Multi-Protocol Border Gateway Protocol (MP-BGP) to route traffic between different ISP. Imagine being in Nairobi Kenya and going to your browser and typing www.cisco.com. This information is passed from one ISP to another using the BGP protocol until it reaches the Web Servers of Cisco in the USA.


BGP is just one protocols that ISP use to accomplish their work. There are many other protocols and technologies that ISP use to do their work. We are going to mention the ones that we offer as a service to our customers who may need them. The services/technologies are:

1. Multi-Protocol BGP

2. Multi-Protocol Label Switching Layer 3 Virtual Private Networks (MPLS L3VPNs)

3. Advanced Service Provider Quality of Service (QoS)

4. Advanced Service Provider Routing and Switching.

5. Designing, Deploying and Troubleshooting Cisco Metro Optical Networks (METRO)


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