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Thanks to AT&T and the Bell Operating Companies.
Control C and The Tribunal of Knowledge
If you have any questions or comments contact:
Control C
Jack Death
Prime Suspect
The Prophet
The Urvile
Or any other member of the TOK.
==============================================================================
==Phrack Inc.==
Volume Two, Issue 18, Phile #9 of 11
The Tribunal of Knowledge presents..
A Few Things About Networks
===========================
Brought to you by Prime Suspect (TOK)
June 1, 1988
Seems like if you're into hacking you sometime or another run into using
networks, whether it be Telenet, Tymnet, or one of the Wide Area Networks.
One popular Network that hackers have used for some time is Arpanet. Arpanet
has been around for quite a long time. There are changes made to it almost
daily and the uses of it are much more than just logging into other systems.
Many college students find themselves getting acquainted with Bitnet these
days. Bitnet is SO new compared to other networks that it's got a lot of
potential left. There is much more to it then just mail and file transfers.
There are interactive uses such as the RELAY for real-time discussion with
others (equivalent to a CB mode) and another popular use is the network
information center to receive technical files about networking. There are
many many mail addresses that are used for database searching, and subscribing
to electronic magazines. You will find these same uses on other Wide Area
Networks also. I will give you 3 related network areas. These three areas
include: The AT&T company networks, UUCP, and Usenet cooperative networks.
Please note that some of the information I gathered for this file dated back
to 1986. But I tried to keep it as current as possible.
AT&T (Company Network)
----------------------
AT&T has some internal networks, most of which use internally developed
transport mechanisms. Their most widely used networks are UUCP and USENET,
which are not limited to that corporation and which are discussed later. All
internal AT&T networks support UUCP-style h1!h2!h!u source routing syntax and
thus appear to the user to be UUCP. Within AT&T, UUCP links are typically
over 1,200-bps dial-up telephone lines or Datakit (see below).
Among AT&T's other networks, CORNET is an internal analog phone network
used by UUCP and modems as an alternative to Direct Distance Dialing (DDD).
Datakit is a circuit-switched digital net and is similar to X.25 in some
ways. Most of Bell Laboratories is trunked together on Datakit. On top of DK
transport service, people run UUCP for mail and dkcu for remote login. In
addition to host-to-host connections. Datakit supports RS232 connections for
terminals, printers, and hosts. ISN is the version of Datakit supported by
AT&T Information Systems. Bell Laboratories in Holmdel, New Jersey, uses ISN
for internal data communication. BLICN (Bell Labs Interlocation Computing
Network) is an IBM mainframe RJE network dating from the early 1970s when
Programmer's Workbench (PWB) was a common version of the UNIX operating
system. Many UNIX machines with PWB-style RJE links use BLICN to queue mail
and netnews for other UNIX machines. A major USENET host uses this mechanism
to feed news to about 80 neighbor hosts. BLICN covers Bell Laboratories
installations in New Jersey, Columbus, Ohio, and Chicago, and links most
computer center machines. BLN (Bell Labs Network) is an NSC Hyperchannel at
Indian Hill, Chicago.
AT&T Internet is a TCP/IP internet. It is not a major AT&T network, though
some of the best-known machines are on it. There are many ethernets connected
by TCP/IP over Datakit. This internet may soon be connected to the ARPA
Internet.
ACCUNET is AT&T's commercial X.25 network. AT&T MAIL is a commercial
service that is heavily used within AT&T Information Systems for corporate
internal mail.
UUCP (Cooperative Network)
--------------------------
The name "UUCP," for Unix to Unix CoPy, originally applied to a transport
service used over dial-ups between adjacent systems. File transfer and remote
command execution were the original intent and main use of UUCP. There was an
assumption that any pair of communicating machines had direct dial-up links,
that is, that no relaying was done through intermediate machines. By the end
of 1978, there were 82 hosts within Bell Laboratories connected by UUCP.
Though remote command execution and file transfer were heavily used, there is
no mention of mail in the standard reference. There was another similar
network of "operational" hosts with UUCP links that were apparently outside
Bell Laboratories, but still within the Bell System. The two networks
intersected at one Bell Laboratory machine.
Both of these early networks differed from the current UUCP network in
assuming direct connections between communicating hosts and in not having