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Which two protocol numbers are used by DHCP messages? (Choose two)
UDP 69
UDP 68
UDP 67
TCP 69
TCP 67
TCP 68
DHCP messages uses UDP ports 67 and 68. As per RFC 1531, messages are sent from client to the DHCP Server on port 67 and from the server to the DHCP Client on port 68. DHCP uses UDP as its transport protocol thus, eliminating answers B, D and E. Answer A or UDP port 69 is used by TFTP service. (https://tools.ietf.org/html/rfc1531 http://en.wikipedia.org/wiki/ListofTCPandUDPportnumbers)
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