The base UDP destination port is used in the
traceroute datagrams. This value of this object is
often larger than 30,000 to make it improbable
that this port is used (this causes the
destination host's UDP module to generate an ICMP
port unreachable so the traceroute operation
knows when the operation is accomplished).
The traceroute operation will increment this value
of this object each time it sends a datagram. This
object should be used in the unlikely event that
the destination port is listening to a port in the
default traceroute port range.