Some surfaces work better for certain purposes. The Internet has a wide variety of road surfaces, some favoring certain types of traffic over others: Compare a heavily loaded truck slowly climbing the rough road surface of a hill to a sports car zipping down smooth concrete. SIP is a protocol that operates within the application layer.ĭifferent application layer protocols are used to create different surfaces. The application layer determines the quality of the “road surface” directly above it. At the top, just under the surface, is the application layer. Within the link layer, link layer protocols organize groups of local connections into large networks.

One of the lowest layers supporting the Internet is called the link layer.

Each layer has its own specific set of languages used to communicate within that layer. These lower layers support-and determine the quality of-the layers above them. Most Internet users only ever see the contents of the vehicles traveling on the roads.īut like real roadways, the Internet has many layers below the surface. On it are many types of vehicles, delivering various-sized packages (or packets, to use the technical term) containing a variety of information at a wide range of speeds. Imagine the Internet as a vast network of roads and highways. What Is the Session Initiation Protocol (SIP)? We’ll explain what SIP trunking is, why you need it, and the primary considerations that you should factor in when deciding on a provider. While this service is generally included with “per-user” licenses for cloud-based phone systems, if you have an on-premise system you’ll most likely need a SIP provider to connect calls with it. SIP trunking is a network service that allows businesses to connect VoIP phone systems to the traditional phone network.

Onsip outage