Words that end in 23z
Maybe these words will be useful:
- rfc 1123 — (networking, standard) The RFC "Requirements for Internet Hosts Application and Support" which clarifies or changes the specification of protocols given in earlier RFCs. RFC 1123 defines the terms "MUST", "SHOULD", "MAY", "unconditionally compliant", "conditionally compliant". Capitals are used to emphasise that the official definition of the word is being used. MUST or REQUIRED means an absolute requirement for conformance. SHOULD or RECOMMENDED means the item can be ignored under certain circumstances, although the full implications should be understood. MAY or OPTIONAL means the implementor can choose, usually depending on whether it is needed or not. Something "unconditionally compliant" meets all the MUST and SHOULD requirements, "conditionally compliant" meets all the MUST requirements and "not compliant" - does not meet some MUST requirement. For example, RFC 1123 amends RFC952 to say software MUST handle either a letter or a digit as the first character of a hostname.
- v.23 — (protocol, standard) An ITU-T modem protocol which allowed half-duplex (unidirectional) data transmission at 1200 bits per second with a 75 bps back channel and fall back to 600/75 bps. This was the main standard used for British Telecom's Prestel service.
- eia-423 — (communications, standard) (Formerly "RS-423") An EIA serial line standard which specifies single ended communication. The mechanical connections for this interface are specified by EIA-449. Although it was originally intented as a successor of EIA-232 it is not widely used. The EIA-232 standard has its limits at 20kbps and 1.5m. EIA-423 can have a cable lenght of 1200m, and achieve a data rate of 100Kbps. When no data is being transmitted, the serial line is at a logical zero (+3 to +15 Volts). A logical one is represented as a signal level of -15 to -3 Volts. In practise, one often finds signals which switch between nominally +4.5 and +0.5 Volts. Such signals are large by modern standards, and because the impedance of the circuits is relatively high, the allowable bit rate is modest. The data is preceded by a start bit which is always a logical one. There may be seven or eight bits of data, possibly followed by an even or odd parity bit and one or two stop bits. A "break" condition is a continuous logical one on the line which is what would be observed if nothing was connected.
- iso 8823 — presentation layer
- rfc 1823 — (networking, standard) The RFC defining the C language application program interface to the Lightweight Directory Access Protocol.
- h.323 — (communications, standard) The ITU-T standard for sending voice (audio) and video using IP on a LAN without QoS. H.323 includes Q.931 for call setup, H.225 for call signalling, H.245 for exchanging terminal capabilities, RTP/RTCP for packet streaming, G.711/G.712 for CODECs, and several other protcols, many of which need to be negotiated to setup a simple voice call. The complexity of H.323 has lead to the IETF proposing the simpler alternatives SIP and MGCP/Megaco.
- rs-423 — EIA-423
- ieee 802 — (networking, standard) The IEEE standards for local area networks. The spanning tree algorithm is defined in IEEE 802.1 (under consideration), Logical Link Control (LLC, the upper portion of the data link layer) in IEEE 802.2, Ethernet in IEEE 802.3, Token Bus in IEEE 802.4 and IBM Token Ring in IEEE 802.5. The equivalent ISO standard is IS 8802.
- ieee 802.2 — (Networks) The IEEE standard defining Logical Link Control (LLC, the upper portion of the data link layer) for local area networks.