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- E. Harslen
- J. Heafner
- Network Working Group RANL
- Request for Comments: 50 4/30/70
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- Comments on the Meyer Proposal
- ------------------------------
-
- We find the Meyer proposal (Note #46) to be the most acceptable
- to dare, for exactly the reasons that he enumerates; viz., simple,
- suffices for most planned uses of the Network, easy to implement,
- can be extended. It does not encompass everything that has been
- suggested recently, however, we do agree with the items that are
- proposed and we feel that the missing features are probably not
- worth doing battle over and thus delaying the specification.
-
- We make the following comments on the seven issues rasied in
- Note #47.
-
- 1) We agree with Steve that dynamic reconnection will later
- be required for more sophisticated uses of the Network.
- We also agree with the Project MAC people that it
- unnecessary initially. A better job can be done of dynamic
- reconnection given some Network experience and the specific
- needs of its use.
-
- 2) INT is easy to implement and serves a useful purpose.
-
- 3) We favor including a sub-field for instance tag identifier.
- We see the need for both cases; a) where multiple processes
- should appear indistinguishable, and b) where a given
- user owning multiple processes must distinguish among
- them. Those program parts that should not distinguish
- among processes should simply ignore the instance tag.
- Tom's suggestion to use part of the user number sub-field
- merely reduces the combined length of sub-fields from 32
- bits to 24 bits; the problem remains.
-
- 4) We disagree with both Steve and MAC in that no special
- structure should be imposed on the data transmitted. We
- prefer the "message data type" mentioned by E. I. Ancona,
- Note #42, page 1. An example of its use was cited in
- Note #39, page 2, transmit vs broadcast.
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- [Page 1]
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- With regard to a standard character set, we strongly
- support adopting one in the beginning, and in particular
- ASCII. We have observed that most sites have previously
- suggested ASCII. Is there anyone who objects?
-
- 5) Word boundary alignment is more attractive than double
- padding.
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- 6) Steve's suggestion of short-term queueing of RFCs is
- acceptable as an option.
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- 7) We support the UCC in Note #46 for three principle reasons:
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- a) In general the user should not know the remote socket
- code of the process to whom he wishes to communicate.
-
- b) The additional duplex connection can provide some
- superfisory control over process behavior, possibly
- in conjunction with the interrupt procedure.
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- c) Most of the other proposed methods demand queueing.
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- We think there must be a standard UCC, yet we encourage
- parallel experimental UCCs.
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- We make two additional comments on Note #46 that were not reiterated
- in Note #47.
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- BLK and RSM are more straightforward than previous suggestions and
- they do not deny multiplexing over a given link. With regard to
- the use of links, we refer to an example given by Bob Kahn where
- an intermediate IMP goes down and eats some's RFNM. This
- should not necessitate reconnection.
-
- In Note #46, page 6, the statement that the UCC has the ability
- to close connections to a dead process is installation dependent.
- In our particular case the NCP is notified directly of process
- failure due to the particular software interface through which all
- processea, including NCP, must communicate.
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- JFH:hs
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- [ This RFC was put into machine readable form for entry ]
- [ into the online RFC archives by Gary Okada 7/97 ]
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