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UNIX for Advanced & Expert Users
X25 Address - A challenge...
Post 11284 by rwb1959 on Saturday 1st of December 2001 01:53:58 PM
12-01-2001
I'm not sure what exactly you're asking for
but in X.25, the CALL REQUEST PACKET contains
the to and from addresses.
The addressing system used in X.25 is defined in
CCITT recommendation X.121. This system is similar
to the public switched telephone network, with
each host identified by a decimal number
consisting of country code, a network code,
and an address within the specified network.
The full address may contain up to 14 digits, of
which the first three indicate the country , and
the next one indicates the network number(for
countries with many public networks multiple country codes exist). The division of the
remaining 10 digits is not specified by X.121,
permitting each network to allocate the
10 billion addresses itself.
Again, I'm not sure if this is what you are
looking for...
but in X.25, the CALL REQUEST PACKET contains
the to and from addresses.
The addressing system used in X.25 is defined in
CCITT recommendation X.121. This system is similar
to the public switched telephone network, with
each host identified by a decimal number
consisting of country code, a network code,
and an address within the specified network.
The full address may contain up to 14 digits, of
which the first three indicate the country , and
the next one indicates the network number(for
countries with many public networks multiple country codes exist). The division of the
remaining 10 digits is not specified by X.121,
permitting each network to allocate the
10 billion addresses itself.
Again, I'm not sure if this is what you are
looking for...
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LEARN ABOUT OPENDARWIN
lo
LO(4) BSD Kernel Interfaces Manual LO(4) NAME
lo -- software loopback network interface SYNOPSIS
pseudo-device loop DESCRIPTION
The loop interface is a software loopback mechanism which may be used for performance analysis, software testing, and/or local communication. As with other network interfaces, the loopback interface must have network addresses assigned for each address family with which it is to be used. These addresses may be set or changed with the SIOCSIFADDR ioctl(2). The loopback interface should be the last interface configured, as protocols may use the order of configuration as an indication of priority. The loopback should never be configured first unless no hard- ware interfaces exist. DIAGNOSTICS
lo%d: can't handle af%d. The interface was handed a message with addresses formatted in an unsuitable address family; the packet was dropped. SEE ALSO
intro(4), inet(4), ns(4) HISTORY
The lo device appeared in 4.2BSD. BUGS
Previous versions of the system enabled the loopback interface automatically, using a nonstandard Internet address (127.1). Use of that address is now discouraged; a reserved host address for the local network should be used instead. 4.2 Berkeley Distribution June 5, 1993 4.2 Berkeley Distribution