; <FETGENBAUMD>ARPANET, 31 SAT 27=SEP#75 83:33PM

26eSEPe75 15227212=PDT,8955 7000000000000

Mai} from BBN@TENEX pevd at 26°SEP=75 1526=PDT
Dates 26 SEP 1975 1825EDT

From: GIRDVAINIS at SBBN=TENEX

Subject? ARPANET MANAGEMENT TRANSITION

Tos FEIGENBAUM at USC#ISI

FROM? Defense Communications Agency
Washington, 0,C, 20305

oe ee = * Se sce

SUBJECT: ARPANET Management Transition

1, The operational management of the ARPANET was transferred
from the Defense Advanced Research Project Agency to DCA on

1 July 1975, Enclosure 1 is a memorandum of policy for the
utilization of ARPANET, Enclosure 2 {8s a copy of the ARPANET
Management Transition Plan whieh gives a detatled description
of the network,

2, The ARPANET backbone jis now being funded through the
Communications Services Imdustrial Fund (CSIF), managed by
DCA, Monthly billings for ARPANET services will be prepared
by the Defense Commercial Communications Office (OECCO),
located at Seott AFB, Illinis 62225, The first billing is
expected to be completed during September 1975, and will be
retroactive to 1 July 1975, Al] subsequent billings will be
momthiy, The FY 1976 monthiy billing rate will be $4,900
for each TIP or IMP, A one percent overhead charge wil! be
added to this monthly billmg pate, It should be noted that
DECCO wil! meet bill the traividual contractors such as ISI,
MITRE» ete, but wil] of1) the sponsor of the IMP op TIP,
@eQ_ ARPA will be billed for all the ARPA=sponsored nodes,

32 A sponsors grove wil! be established with the first
meeting scheduled for 21 October 1975, The purpose of the
group {8 to provide a vehicle for coordinating proposed
metwork changes which may {impact sponsors and users, and to
exchange ideas amd information on network operations and user
activities, Al] network users will be represented by their
SPONSOR,

4, Questions regarding the ARPANET should be directed to
the ARPANET Management Branch Code $35, AUTOVON 222946175 or
222°6176- Commercial (202) 692"6175 or 692-6176,

FROM Defense Communications Agency
Washington, DC, 20305

SUBJECT: Policy for ARPANET Utilization
1, PURPOSE: This decument prescribes the policy of the
Defense Communications Agency concerning urtlization of

ARPANET,

2, APPLICABILITY: This policy applies to all users of
3 <FETGENBAUMD>ARPANET, 31 SAT 27"SEP#75 8:35PM

the ARPANET,
3, DEFINITIONS:

@, INTERFACE MESSAGE PROCESSOR (IMP), <A store and
forwarld packet switeh which will accommodate up to four
host computers,

b, TERMINAL INTERFACE PROCESSOR (TIP), A Store and
forward packet switch which will accommodate up to 3 host
computers and 64 terminals,

Cy, HOST, A customer owned computer which is comnmected
to a host port on am IMP or TIP,

(12 LOCAL HOST, A host located within 30 feet of
an IMP op TIP,

(2) DISTANT HOST, A host which is more than 30 feet
but less than 2-000 feet from am IMP or TIP,

(3) VERY DISTANT HOST, A host which {8 located over
22000 feet from am IMP or TIP and requires modems,

gd, TERMINAL, A teletypewriter, CRT or similar unit
whieh {9 commected to a terminal port of a TIP,

e, INTERSWITCH TRUNKS, A circuit between packet
Switches Cesgs»s IMPS and TIPS) which is used to pass
messages through the network,

f. ACCESS LINE, A cirevit from a host computer or
terminal to am IMP or TIP, The circuit may be a local cable
or a transmission facility requiring modems,

9, BACKBONE, The switching nodes (e,g.s IMPS + TIPS),
the commumications lines interconnecting the nodes, and
the metwork contro! center,

mh, SPONSOR, A Dod or U,S, Government Agency, which
auvelifies aS an ARPANET user is authorized to sponsor a
contractor or other nmeon=government activity for access to
the ARPANET for the conduct of offfedial U,S, Government
business,

4, DESCRIPTIONS The ARPANET {8 an operational, computerized,
Packet switching DoD digital metwork which provides a ¢apa=
bility for terminals or geographically separated computers,
called Hosts, to communicate with each other, The Host
computers typically differ from ome another im types speed,
word lengths and operating system, Each terminal or Host
computer is connected into the network through a local small
computer calted am IMP or TIP, The complete network is formed
by interconnecting the IMP!s thraugh wideband communication
limes (S0KB) supelied by common carriers, Each IMP and TIP

is orogrammed to receive and farward messages to the neighbor=
ting IMP's or TIP!s Im the network, During a typical Host to
py “sFEIGENBAUM>ARPANET, $14 SAT 27=SEP@#75 8:33PM

Host operations a Host passes a message to its IMP; the
message is passed from IMP to IMP through the network until}
it finally arrives at the destination IMP, which passes it
along to the destination Host, A terminal (teletypewriter or
CRT) accesses the network through a Terminal Interface
Processor (TIP) and sends a message to a Host or another
Terminal, The terminal messege passes through the network in
the Same manner as a Host to Host message, The elements of the
network are tke Interface Message Processors (IMP), Terminal
Interface Processors (TIP), interawiteh trunks, access lines,
host computers and terminals,

5, RESPONSIBILITY FOR OPERATIONAL DIRECTION?

a, The Director, OCAr wil) control system engineering and
exercise operational direction over those operating elements of
ARPANET which are part of the backbome, ARPANET subscriber
equipment /terminals are mon=backbone facilities, However,
ARPANET subSeribers must be responsive to management instruce
tions issued by the DCA,

b, Criteria and standards for interface are specified in
Repert Number 1822, Interface Message Processor! Specifica=
tions for the Interconnection of a Host amd an IMP (Bolt,
Beranek and Newman, Apri! 1973), New criteria and standards
developed Joimtily by the DCA, the Military Services, and the
Defense agencies wil! be promulgated by the DCA, Al) sub=
serf{bers wil) meet ARPANET interface criteria,

Cy, The Director, DCAs om a continuing basiss will monitor
the effectiveness cf ARPANET, evaluate those matters which
have Major impact op will impact adversely on the network, and
direct action to alteviate ar prevent such impact,

6, SUBSCRIBER ACCESS: The ARPANET is intended to be used
solely for the conduct of er in Suppert of of ftetal U,S§,
Government business,

a. DOD USERS » Subject to the availability of assets,
Dod activities will be connected te the ARPANET provided their
Peavirements are crocessed through normal communications
Validating channels,

b, NON#DOD U,S, GOVERNMENT ACTIVITIES = Requests for
ARPANET Service from monm=DoD U.S, Government activities will
be considered by DCA on a case*by=case basis,

c, NON*GOVERNMENT U,S, ACTIVITIES = A Dod or other U,S,
Govermmant activity authorized to use the network may sponsor
aS a UBer, a NONM=govermment activity performing in conmtractural
support of the U.S, Government, Justification outlining
benefits to the U.S, Government for such access shall! be
provided to DCA by the sponsoring activity, Cost for network
services provided to nonegovernment activities shal! be
allocated to the sponsoring activity,

Gy NON@ULS, ACTIVITIES = Nonmewl,8, activities will not be
5 <FETGENBAUM>ARPANET, 371 SAT 27*SEP#75 8333PM

directly conmected to the ARPANET, Utilization of the ARPANET
may be provided through the facilities of an authorized user
Previded the use is coordinated with DCA,

@, NONCOMPETITIVE BASIS = The ARPANET is am operational
Dod matwork and {8s not intended to compete with comparable
commereta!l Service, <Accordinglyr before ARPANET service is
provided to any noneU,S, Government activity it must be
determined that adeauate commercial service {is not available,

*, PRIVACY = The proposed use of the ARPANET must not
be im violation of applicable information privacy laws,

7, PROCEDURES

Oe UygS, Government activities requesting ARPANET service
must apply to the Director, Defense Communications Agency,
ATTN$ ARPANET Mamagement Branch, Code 535, The format for
the application is at enciosure ji,

b, A rom U.S, Government activity must have a U.S,
Government asaetivity acting as a sponsor, Application for
sevice om the ARPANET must be submitted by the sponsoring
activity to Director, Defense Communications Agemcy, ATTN
ARPANET Management Beanch, Code 535, The application must
clearly state how the proposed service {s in the best
interest of the U,S, Government, is essential to mission
fulfiliments does mot violate information privacy jaws, and
that adequate commercia) service is mot available, The format
for this application is at enclosure t,

¢, DCA will evaluate the application and advise the
Peavesting activity of the disposition of their request with=
im thirty days, If the application {8s approved the motificas
tiom will inelude tnatructions for gaining access to the
ARPANET,