Well Known Service resource.

Constants

ClassValue = IN::ClassValue

TypeValue = 11

Attributes

[R] bitmap

A bit map of enabled services on this host.

If protocol is 6 (TCP) then the 26th bit corresponds to the SMTP service (port 25). If this bit is set, then an SMTP server should be listening on TCP port 25; if zero, SMTP service is not supported.
[R] protocol

IP protocol number for these services.
[R] address

The host these services run on.
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