Voice Over IP

OVERVIEW OF IP

Scores of books are available that describe IP in detail. The approach here is to provide an overview of IP, and emphasize the aspects of IP that are especially important for the support of voice traffic. I recommend any of the Douglas Comer and Richard Stevens books to the newcomer to TCP/IP.

IP is an example of a connectionless service. It permits the exchange of traffic between two host computers without any prior call setup. (However, these two computers can share a common connection-oriented transport protocol.) Since IP is connectionless, it is possible that the datagrams could be lost between the two end-user's stations. For example, the IP gateway enforces a maximum queue length size; if this queue length is violated, the ...