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The DHCP Discover message uses FF:FF:FF:FF:FF:FF as a layer 2 broadcast and uses UDP as the Transport layer protocol. Therefore, the correct answer is (B) 1 and 2.

DHCP (Dynamic Host Configuration Protocol) is used to dynamically assign IP addresses and other network configuration parameters to network devices. The DHCP Discover message is the first step in the process where a client requests network configuration information from a DHCP server. The client sends a DHCP Discover message as a layer 2 broadcast using the MAC address FF:FF:FF:FF:FF:FF to reach all devices on the local network. The message is encapsulated in a UDP packet with the source port 68 and the destination port 67, as per the DHCP protocol specification.

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