General Options Option 1 (Subnet Mask) Description The subnet mask option specifies the client's subnet mask as per RFC 950
If both the subnet mask and the router option are specified in a DHCP reply, the subnet mask option MUST be first
The code for the subnet mask option is 1, and its length is 4 octets
VALIDVALUE e
0 SETTING netmask Option 3 (Router) Description The router option specifies a list of IP addresses for routers on the client's subnet
Routers SHOULD be listed in order of preference
The code for the router option is 3
The minimum length for the router option is 4 octets, and the length MUST always be a multiple of 4
VALIDVALUE e
1 SETTING gateway Option 4 (Time Server) Description The time server option specifies the time server (RFC