H.225.0 is a key protocol in the H.323 VoIP architecture defined by ITU-T. H.225.0 describes how audio, video, data and control information on a packet based network can be managed to provide conversational services in H.323 equipment. H.225.0 has two major parts: Call signaling and RAS (Registration, Admission and Status).
An extended memory (XMS) driver included with DOS, Windows 3.1, Windows for Workgroups and Windows 95. Windows 95 automatically loads himem.sys during start-up. With older versions of Windows, and with DOS, himem.sys must be explicitly loaded by placing a command in CONFIG.SYS.
(1) Also called a page hit. The retrieval of any item, like a page or a graphic, from a Web server. For example, when a visitor calls up a Web page with four graphics, that’s five hits, one for the page and four for the graphics. For this reason, hits often aren’t a good indication […]
- hit-and-run post
In online forums and other online discussion spaces, a hit-and-run post is the term used to describe users who register for the service, post one message, then never return. In most cases these single posts contains information not related to the forum topic or the post may contain a single URL that is posted for […]
In e-mail terminology a hoax is a message which is written to deliberately spread fear, uncertainty and doubt.
- hold down timer
A function of a router that prevents a route from being updated for a specified length of time, in seconds. A hold down timer is often used to ensure sufficient time for all routers to be updated when a route fails. See router.