Network Working Group D. Walden Request for Comments: 547 BBN-NET NIC: 17793 13 August 1973 Change to the Very Distant Host Specification Attached is a new version of figure F-4 for BBN Report 1822, Specification for the Interconnection of a Host and an IMP. Also attached is replacement text for the paragraph beginning at the bottom of page F-7 and continuing through page F-8. Please put this RFC with your copy of 1822 pending update of 1822. DCW/ph SPECIAL PACKET BIT ___ | | ___HELLO/I-HEARD-YOU BIT | ___ UNUSED __ | | | | | | | | V V V V _______________________________________________________________ | | | | | |///////| | |///| | | | | | | |///////| | |///| | |___|___|___|___|___|___|___|___|___|___|///|///|___|___|///|___| ^ ^ PACKET WORD COUNT ^ ^ ^ ^ | | ( 6 BITS ) | | | | | | | | | CHANNEL | | | | | NUMBER | | | | | | PACKET HOST/IMP BIT | CHANNEL ZERO | ODD/EVEN BIT | ACKNOWLEDGE BIT | | LAST PACKET BIT CHANNEL ONE ACKNOWLEDGEMENT BIT FIG. F-4 CONTROL WORD FORMAT Walden