300-410 ENARSI: Implementing Cisco Enterprise Advanced Routing and ServicesDemo

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QuestionQ23

Infrastructure Services

Refer to the exhibit.

Question Image

The network administrator can observe the DHCP discovery packet at R1, but R2 does not respond to the DHCP request. The R1-related interface has been configured with the DHCP helper address. When the PC connects directly to R2's Fa0/1 interface, the DHCP server assigns the PC an IP address from the DHCP pool.

Which two commands resolve this issue?

Choose two
  • A service dhcp-relay command on R1
  • B ip dhcp relay information enable command on R1
  • C ip dhcp option 82 command on R2
  • D service dhcp command on R1
  • E ip dhcp relay information trust-all command on R2
Explanation

service dhcp enables Cisco IOS DHCP service, including DHCP relay processing, on R1. ip dhcp relay information trust-all configures R2 to accept DHCP packets containing relay-agent information (Option 82) from all interfaces; otherwise, relay-agent information from an untrusted source can cause the DHCP packet to be discarded.

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