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The first working version that was widely deployed was assigned version number 4. [10] A separate protocol based on reliable connections was developed and assigned version 5. IP version 7 was chosen in 1988 by R. Ullmann as the next IP version because he incorrectly assumed that version 6 was in use for ST-II.
AT&T held a monopoly on communications infrastructure in the United States, as did the General Post Office (GPO) in the United Kingdom, which was the national postal, telegraph and telephone service (PTT). They both believed speech traffic would continue to dominate and continued to invest in traditional telegraphic techniques.
The gateway is on the same network as end devices. The gateway address must have the same subnet mask as host devices. Each host on the network uses the same gateway. The gateway should have a static address, as changing the address would cause packets not to be delivered. The gateway is typically assigned either the highest or lowest network ...
Media gateway protocols were developed based on the Internet model of networking, the Internet Protocol Suite, and are referred to as device control protocols. A media gateway is a device that offers an IP interface and a legacy telephone interface and that converts media, such as audio and video streams, between them.
The Gateway Control Protocol (Megaco, H.248) is an implementation of the media gateway control protocol architecture for providing telecommunication services across a converged internetwork consisting of the traditional public switched telephone network (PSTN) and modern packet networks, such as the Internet.
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IP versions 1 to 3 were experimental versions, designed between 1973 and 1978. [7] Versions 2 and 3 supported variable-length addresses ranging between 1 and 16 octets (between 8 and 128 bits). [ 8 ] An early draft of version 4 supported variable-length addresses of up to 256 octets (up to 2048 bits) [ 9 ] but this was later abandoned in favor ...
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