Network Standards ISQS 3349/6341. The Importance of Standards Ensure that hardware and software produced by different vendors can work together. Makes.

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Presentation transcript:

Network Standards ISQS 3349/6341

The Importance of Standards Ensure that hardware and software produced by different vendors can work together. Makes it much easier to develop software and hardware that link different networks because software and hardware can be developed one layer at a time. Normally, the standards used in data communication are called protocols.

Internet Standards z related standards yIMAP, POP, X.400, SMTP, CMC, MIME, binhex, uuencode zWeb related standards yhttp, CGI, html/xml/vrml/sgml zInternet directory standards yX.500, LDAP zApplication standards yhttp, FTP, telnet, gopher, wais zVideoconferencing standards yH.320, H.323, Mpeg-1, Mpeg-2

The Standards Making Process Two types of standards: yFormal standards are developed by an official industry or government body. yDefacto standards emerge in the marketplace and supported by several vendors, but have no official standing.

The Standards Making Process Formal standardization process has three stages 1. Specification stage: developing a nomenclature and identifying the problems to be addressed. 2. Identification of choices stage: those working on the standard identify the various solutions and choose the optimum solution from among the alternatives. 3. Acceptance, the most difficult stage: defining the solution and getting recognized industry leaders to agree on a single, uniform solution

Telecommunications Standards Organizations zInternational Telecommunications Union - Telecommunication Standardization Sector (ITU- TSS) Technical standard setting organization of the UN ITU. Formerly called the Consultative Committee on International Telegraph and Telephone (CCITT) Comprised of representatives of over 150 Postal Telephone and Telegraphs (PTTs), like AT&T, RBOCs, or common carriers. zITU-TSS made v-series modem standards.

Telecommunications Standards Organizations zInternational Organization for Standards (ISO) Member of the ITU, makes technical recommendations about data communications interfaces. zISO created Open System Interconnection (OSI) standard.

Internet Engineering Task Force A protocol proposed by a vendor IETF working group study the proposal IETF issues a request for comment (RFC) IETF reviews the comments IETF proposes an improved RFC The proposed standard becomes a draft standard if two or more vendors adopt it The RFC becomes a proposed standard

More Organizations yAmerican National Standards Institute (ANSI) yInstitute of Electrical and Electronics Engineers (IEEE) yInternet Engineering Task Force (IETF)IETF yElectronic Industries Association (EIA) yNational Institute of Standards and Technology (NIST) yNational Exchange Carriers Association (NECA) yCorporation for Open Systems (COS) yElectronic Data Interchange -(EDI) of Electronic Data Interchange for Administration Commerce and Transport (EDIFACT).