How does using DHCP Option 82 on a Cisco Wireless LAN Controller make a network more secure?
A.
by preventing rogue DHCP servers from returning unauthorized addresses
B.
by ensuring that DHCP address are parity-checked before being issued
C.
by ensuring that clients receive proper routing information as part of their DHCP response
D.
by preventing DHCP address requests from untrusted relay agents
E.
by adding fully qualified domain information that the client can use for SSL authentication
Explanation :-
Information About DHCP Option 82. DHCP option 82 provides additional security when DHCP is used to allocate network addresses. It enables the controller to act as a DHCP relay agent to prevent DHCP client requests from untrusted sources.