Traffic Statistics (March 1973)
A monthly scoreboard of how many packets each ARPANET host sent in March 1973.
McKenzie, A.M., "Traffic Statistics (March 1973)", RFC 497, DOI 10.17487/RFC0497, April 1973, <https://www.rfc-editor.org/info/rfc497>.
@misc{rfc497,
series = {Request for Comments},
number = 497,
howpublished = {RFC 497},
publisher = {RFC Editor},
doi = {10.17487/RFC0497},
url = {https://www.rfc-editor.org/info/rfc497},
author = {A.M. McKenzie},
title = {{Traffic Statistics (March 1973)}},
pagetotal = 4,
year = 1973,
month = apr,
} RFC text
Network Working Group A. McKenzie
Request for Comments: 497 BBN-NET
NIC: 15651 10 April 1973
Updates: RFC #482
Traffic Statistics (March 1973)
Attached are the Host traffic statistics for the month of
March 1973.
HOST THROUGHPUT SUMMARY
(PACKETS OUTPUT)
MARCH 1973
MISSING DATA FOR 16, 20
INTER- INTRA- AVG. DAILY
NODE NODE TOTAL INTERNODE DAYS
UCLA HOST 0 188383 55261 243644
UCLA HOST 1 1406528 105973 1512501
-------- -------- --------
1594911 161234 1756145 54997 29
SRI HOST 0 4112207 116788 4228995
SRI HOST 1 150388 9932 160320
-------- -------- --------
4262595 126720 4389315 146986 29
UCSB HOST 0 1151686 860021 2011707
UCSB HOST 1 558 2570 3128
-------- -------- --------
1152244 862591 2014835 39733 29
UTAH HOST 0 600680 82655 683335 20713 29
BBN HOST 0 17 24341 24358
BBN HOST 1 5003328 855463 5858791
BBN HOST 2 125394 594853 720247
BBN HOST 3 142697 21956 164653
-------- -------- --------
5271436 1496613 6768049 181774 29
MIT HOST 0 131795 25162 156957
MIT HOST 1 197210 149259 346469
MIT HOST 2 539726 584621 1124347
MIT HOST 3 455256 556169 1011425
-------- -------- --------
1323987 1315211 2639198 45655 29
RAND HOST 0 344174 1119 345293 11868 29
SDC HOST 0 14276 3584 17860 492 29
HARV HOST 0 723997 6176896 6900893
HARV HOST 1 10600 4716269 4726869
-------- -------- --------
734597 10893160 11627760 25331 29
LINC HOST 0 3513 10765 14278
LINC HOST 1 18306 253153 271459
LINC HOST 2 1329 8527 9856
-------- -------- --------
23148 272445 295593 798 29
STAN HOST 0 1283290 6991 1290281 44251 29
ILL HOST 0 883456 229 883685 30464 29
CASE HOST 0 413996 23471 437467 14276 29
CARN HOST 0 551335 593604 1144939
CARN HOST 1 318203 611546 929749
-------- -------- --------
869538 1205150 2074688 29984 29
AMES HOST 0 5182300 192322 5374622 178700 29
AMEST HOST 0 79508 51977 131485
AMEST HOST 2 6281920 23250 6305170
-------- -------- --------
6361428 75227 6436655 219360 29
MITRE HOST 2 2004885 45 2004930 69134 29
ROME HOST 2 1441949 42 1441991 49722 29
NBS HOST 0 2484 247 2731
NBS HOST 2 1301289 23813 1325102
-------- -------- --------
1303773 24060 1327833 44958 29
ETAC HOST 2 1257899 176 1258075 43376 29
ISI HOST 1 9401088 110020 9511108 324175 29
USC HOST 0 35570 1094538 1130108
USC HOST 2 1984789 1080936 3065725
-------- -------- --------
2020359 2175474 4195833 69668 29
GWC HOST 2 1296489 20 1296509 44707 29
DOCB HOST 2 71084 5052 76136 2451 29
SDAC HOST 0 0 82048 82048
SDAC HOST 2 415623 3112 418735
-------- -------- --------
415623 85160 500783 14332 29
BELV HAD NO TRAFFIC
ARPA HOST 0 0 192614 192614
ARPA HOST 2 1111927 191184 1303111
-------- -------- --------
1111927 383798 1495725 38342 29
ABER HOST 0 5564 0 5564 192 29
BBN T HOST 2 1309458 6866 1316324 45154 29
CCA HOST 0 942305 203288 1145593
CCA HOST 2 2215654 125656 2341310
-------- -------- --------
3157959 328944 3486903 108895 29
XEROX HOST 0 259277 16252 275529 8941 29
FNWC HOST 2 14742 130 14872 508 29
LBL HAD NO TRAFFIC
UCSD HOST 0 390253 14738 404991 13457 29
HAW T HOST 2 236470 175523 412263 8163 29
RML HOST 2 390538 107 390645 13467 29
----------------------------------
TOTAL 56405660 20045130
DAILY AVERAGE 1945023 691212
AVERAGE PER 54028 19200
NODE-DAY
PACKETS/MESSAGES (INTERNODE) 1.08
[ This RFC was put into machine readable form for entry ]
[ into the online RFC archives by Owain Vaughan 11/97 ]
AI ELI5
On this page
§1What the Report Is
RFC 497 is a short cover note, "Attached are the Host traffic statistics for the month of March 1973", followed by one table. It is dated 10 April 1973 and carries the name of A. McKenzie of BBN-NET. It is a data release and defines no protocol.
The table is headed Host Throughput Summary (Packets Output). It notes that data is missing for days 16 and 20 of the month.
It is a note that says: here are the numbers for last month. The numbers are the whole point.
§2How the Table Is Laid Out
Each site (UCLA, SRI, UCSB, BBN, MIT and so on) has one line per numbered host, for example UCLA HOST 0 and UCLA HOST 1. Columns give internode packets, intranode packets and the total.
For sites with more than one host, a subtotal line follows. It also gives the average daily internode figure and the number of days counted, which is 29 for every listed site. BELV and LBL are reported as having no traffic.
Each school gets a row, and each computer in the school gets a line. Next to each line are counts of notes sent to other schools and notes kept inside the same school.
§3The Network Totals
The bottom of the table gives network-wide figures: 56405660 internode packets and 20045130 intranode packets. The daily average is 1945023 internode and 691212 intranode, and the average per node-day is 54028 and 19200.
The last line reports a ratio of packets to messages (internode) of 1.08. The largest single internode count shown is 9401088, for ISI HOST 1, and the largest intranode count is 10893160 for the combined Harvard (HARV) hosts.
At the bottom, someone added everything up and also worked out the average per day, so you can see how busy the whole network was.