Yes, DHCP usually assigns a number of settings for an adaptor, which may include:
IP Address
Subnet Mask
Default gateway
WINS servers
DNS servers
and other settings.
subnet mask default gateway address
Any device (mac or not) receives its subnet mask from the DHCP service, or by manually configuring the interface. In the case of manual configuration you would need to check with your network administrator to find out the correct setting for the subnet mask.
DHCP (Dynamic Host Configuration Protocol). A network node can request an IP address from a DHCP server using a broadcast frame. The DHCP server may assign an IP address to the node as well as a subnet mask and default gateway.
The benefit would be to automatically assign network addresses to clients that need them to work on a local area network. Without DHCP you would have to assign each device an address, subnet mask, and default gateway, plus DNS and WINS server addresses, which can be time consuming and error prone. With DHCP, most of those problems disappear.
The DHCP protocol is used for this purpose.
DHCP Dynamic Host Configuration Protocal
Either go into the network settings and change it, or have the setting changed in the DHCP server settings.
255.255.255.0
yes
255.255.254.0
It does not require a subnet mask.
If this is a default subnet mask, then it would be a class C subnet mask. If you are subnetting a network and this is not the default subnet mask, then it could be either a class A or class B.