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  1. Which of the following describe the DHCP Discover message?
    1. It uses FF:FF:FF:FF:FF:FF as a layer 2 broadcast.
    2. It uses UDP as the Transport layer protocol.
    3. It uses TCP as the Transport layer protocol.
    4. It does not use a layer 2 destination address.

    2. A.

     1 only
    B.

     1 and 2
    C.

     3 and 4
    D.

     4 only

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    Answer : Option B

    Explanation :

    A client that sends out a DHCP Discover message in order to receive an IP address sends out a broadcast at both layer 2 and layer 3. The layer 2 broadcast is all Fs in hex, or FF:FF:FF:FF:FF:FF. The layer 3 broadcast is FF:FF:FF:FF:FF:FF, which means all networks and all hosts. DHCP is connectionless, which means it uses User Datagram Protocol (UDP) at the Transport layer, also called the Host-to-Host layer.

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