Transport Protocols for Department of Defense Data Networks Report to the Department of Defense and the National Bureau of Standards (1985) / Chapter Skim
Currently Skimming:
2 Review of NBS and DOD Objectives
2 Review of NBS and DOD Objectives
Pages 3-12
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From page 3... ...
The following provides a review of each organization's objectives.5 NBS OBJECTIVES The National Bureau of Standards has three primary goals in computer networking: l. To develop networking and protocol standards that meet U.S.
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From page 4... ...
Applications may, for example, include file transfer or message processing. The primary purposes are to advance the state of the art in measurement methodologies for advanced computer networking technologies and determine protocol implementation correctness and performance.
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From page 5... ...
An international crisis is the strongest test of robustness, since the system must operate immediately and with virtually full performance when an international situation flares up unexpectedly. Availability -- Elements of the system needed for operational readiness or fighting must be continuously available.
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From page 6... ...
-- the ability to restore some of the damaged assets to operating status; and reconstitution -- the ability to integrate fragmented assets into a surviving and enduring network. The DOD feels that an important reason for adopting international and commercial standards is that under cases of very widespread damage to its own communications networks, it would be able to support DOD functions by using those civil communications that survive.
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From page 7... ...
Performance includes quantifiable measures such as time delays, transmission integrity, data rates and efficiency, throughput, numbers of users, and other features well understood in computer networks. Equally important is the extent of functiona~ity: What jobs will the network do for the user?
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From page 8... ...
(For reliability, additional virtual circuits may be established to provide an inplace backup.) DOD needs a connectionless mode where the message can be transmitted to one or more parties without the virtual circuit in order to enhance survivability; provide a broadcast capability (one sender to many receivers)
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From page 9... ...
If some of the higher-layer transport and utility protocols have been developed for particular hosts or work stations, their use greatly reduces development, integration, and support costs, although with a potential sacrifice of performance. Interoperability at the applications level, that is, full functional interoperabiJity, is important to specialized communities of users such as the logistics, command and control, or research and development communities.
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From page 10... ...
During peacetime there will be cases where special DOD needs can be best satisfied with commercially available capabilities. As technology continues to provide less expensive, smaller, and more reliable data processing equipment, computer networks will become increasingly prevalent at lower levels of the tactical forces -- land, air, and sea.
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From page 11... ...
, it is important that these transitions be planned, designed, and pretested so that the transition will be nondisruptive. Verifiability -- ~t is essential to have a testing capability where new protocol implementations can be thoroughly tested to ensure that they will interoperate, have full functionality specified, do not contain errors, are robust, and meet quantitative performance needs.
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From page 12... ...
If the DOD delays in moving to ISO protocols and later decides to do so, the costs and disruption will be large. On the other hand, moving now to ISO will be less disruptive.
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