[ih] when did APRANET -TIPs become known as -TACs

[Dave Crocker]

(reposted, to the the table included.)

On 9/28/2025 4:13 PM, John Day via Internet-history wrote:
> The OSI vision was, if anything, Ethernet (an ISO standard), CLNP, TP4, and ACSE.


That sounds reasonable, except for TP0, TP1, TP2, and TP3.

    Feature name                    TP0     TP1     TP2     TP3     TP4
    Connection-oriented network     Yes     Yes     Yes     Yes     Yes
    Connectionless network           No     No       No      No     Yes
    Concatenation and separation     No     Yes     Yes     Yes     Yes
    Segmentation and reassembly     Yes     Yes     Yes     Yes     Yes
    Error recovery                   No     Yes     Yes     Yes     Yes
    Reinitiate connectiona           No     Yes      No     Yes      No
    Multiplexing / demultiplexing over single virtual circuit
                                      No      No     Yes     Yes     Yes
    Explicit flow control            No      No     Yes     Yes     Yes
    Retransmission on timeout        No      No     No       No     Yes
    Reliable transport service       No     Yes     No      Yes     Yes

and the various CONS alternatives to CLNP.

OSI went for the union of everybody's wish lista.  The Internet went for 
the intersection.

d/

-- 
Dave Crocker

Brandenburg InternetWorking
bbiw.net
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