Yes, a LAN could have two DHCP servers, but it wouldn't make much sense. Typically each LAN has it's own DHCP server or uses a DHCP relay agent to get an address from another subnet.
That would require your fridge to be connected to a LAN and would depend on the DHCP server for that LAN.
DHCP Relay, called a helper-address in Cisco systems.
You can boot your system through PXE system, I never heard that you can boot your device through DHCP.
People use servers for such purposes. The server should have at least two network interfaces. Using DHCP server options you can connect two and more networks together.
Settings on a LAN are not stored in any one place; for disaster recovery planning any configuration information should be written down. Most settings for devices on a LAN come from the DHCP server, so backing up that server would preserve most of the typical LAN settings.
Once you are connected in a LAN and IP address configured in same rage using static or DHCP it should be a problem for the conectivity.
Check your network connections. That is usually a main problem of not communicating with either DNS or DHCP on a LAN.
yes, one can configure two dhcp server on a same network. But for doing this, one has to define different scopes in both dhcp server in order to avoid ip address conflict. Eg. one can configure a scope for a lan with network address of 10.0.0.0 as- 10.0.0.10- 10.0.0.100 in one dhcp server. while other scope would be 10.0.0.101-10.0.0.200 . In this way we can have to dhcp servers on a same network. Which ever dhcp server receives the request for the ip address will provide the ip address. IN case for servers, one can use mac bindingin both servers so that they obtain same ip address
DHCP server and default gateway
As the PlayStation 3 cannot generate a DHCP server, they cannot be connected directly together. However, both can be connected to a router and work as part of a LAN that way. Some games for the PlayStation 3 support LAN play.
A lan that is directly or indirectly controlled by a SERVER. In a server based lan, most workstations have to log into the server to gain access to the network.