The N-th network-layer address of the device as reported
in the most recent CDP message's Address TLV, where N-1 is
given by the value of cdpCtAddressIndex. For example, if
the the corresponding instance of cdpCtAddressType had the
value 'ip(1)', then this object would be an IPv4-address.
NOTE - The 1st address received in the Address TLV is
available using cdpCacheAddress