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point-of-presence

Show me everything on Telecom Routing and Switching

- On the Internet, a point-of-presence (POP) is an access point from one place to the rest of the Internet. (POP also stands for the e-mail Post Office Protocol; see POP3.) A POP necessarily has a unique Internet Protocol (IP) address. Your Internet service provider (ISP) or online service provider (such as AOL) has a point-of-presence on the Internet and probably more than one. The number of POPs that an ISP or OSP has is sometimes used as a measure of its size or growth rate.

A POP may actually reside in rented space owned by the telecommunications carrier (such as Sprint) to which the ISP is connected. A POP usually includes routers, digital/analog call aggregators, servers, and frequently frame relays or ATM switches.

Learn more about Telecom Routing and Switching

Advanced BGP network design for stability and security: Working with Border Gateway Protocol (BGP) in an IP network can challenge even the best network engineers. Yet mastering it will yield a more stable and secure network.
BGP essentials: The protocol that makes the Internet work: Border Gateway Protocol (BGP) is the routing protocol that literally makes the Internet work, yet its complexity makes it essential to know how to troubleshoot problems quickly.
Route maps and routing policy: Route maps and how to configure them for routing policies is explained. This chapter also discusses redistribution, quality of service, and route tagging.
IGP route redistribution, route summarization and default routing: Route redistribution, route summarization and default routing are techniques used to distribute traffic using Interior Gateway Protocols (IGPs).
Which routing protocol? Selecting for optimal routing: One of the toughest questions facing network engineers is which routing protocol to use. This chapter shows you how to evaluate if OSPF, IS-IS or EIGRP is better for your network.

CONTRIBUTORS:	Oswaldo Mesias
LAST UPDATED:	25 Feb 2009

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