This object gives the network address that defines this vlan.
If the protocol is IP, this object contains the four bytes of IP
address followed by four bytes of IP Subnet Mask.
If the protocol is IPX, this object contains the four bytes of
Network Number followed by one byte of encapsulation type used
on that network. The values for the encapsulation types are:
byte 5 = 1 - IPX 802.3 encapsulation
byte 5 = 2 - IPX Ethernet2 encapsulation
byte 5 = 3 - IPX LLC encapsulation
byte 5 = 4 - IPX SNAP encapsulation
If the protocol is DECNet, this object contains the one byte of
DEC area.