Which DHCP options can a DHCP server provide to clients? (Choose two.)

DHCP Option 1 is indeed the subnet mask, a critical piece of information that allows a client to determine its network and broadcast addresses. Without a subnet mask, a client cannot properly communicate within its local network or route traffic to other networks. DHCP Option 6 specifies the IP addresses of DNS servers, which are essential for clients to resolve human-readable domain names into IP addresses. Without DNS server information, clients would be unable to access websites or other network resources using their domain names. DHCP Option 3 is for the router (default gateway), not lease duration. Lease duration is typically conveyed in the DHCP ACK message itself, not as a separate option number. Client host name is typically sent by the client to the server, not provided by the server to the client as an option.