Networking Concepts and Technology: A Designer's Resource

The Data Center IP Network

Together FIGURE 1-2 and FIGURE 1-3 provide a high-level overview of the various interconnected networks, collectively referred to as the Internet. These illustrations also show the relationship between the client-side and enterprise-side networks. They show two distinct networks that can be segregated based on business entities:

• The Internet Service Provider (ISP) that provides connectivity to the public Internet for both clients and enterprises

• The owners of the physical plant and communications equipment, which fall into one of the following categories:

  • The Incumbent Local Exchange Carrier (ILEC), which provides local access to subscribers in a local region

  • The Inter Exchange Carrier (IXC), which provides national and ...