200-301: Cisco Certified Network AssociateDemo

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QuestionQ909

IP Connectivity

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Refer to the exhibit. A network engineer is configuring a new router and has applied this configuration. Which additional configuration will allow the PC to obtain its IP address from a DHCP server?

  • A Configure the ip helper-address 172.16.2.2 command under interface Gi0/0.
  • B Configure the ip dhcp relay information command under interface Gi0/1
  • C Configure the ip address dhcp command under interface Gi0/0
  • D Configure the ip dhcp smart-relay command globally on the router.
Explanation

A Cisco router relays DHCP client broadcasts to a remote DHCP server by using the ip helper-address command on the interface that receives the client broadcast. Here, the client is on the Gi0/0 side in the 10.10.10.0/24 network, and the DHCP server is at 172.16.2.2 on a different subnet, so Gi0/0 must be configured with ip helper-address 172.16.2.2. The ip dhcp relay information command controls relay-agent information such as Option 82, ip address dhcp makes the router act as a DHCP client for its own interface address, and ip dhcp smart-relay is not required for standard DHCP forwarding.

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