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Refer to the exhibit. A network administrator has added a new subnet to the network and needs hosts on that subnet to receive IPv4 addresses from the DHCPv4 server.

What two commands will allow hosts on the new subnet to receive addresses from the DHCP4 server? (Choose two.)

CCNA 2 v7 SRWE Final Exam Answers 19
CCNA 2 v7 SRWE Final Exam Answers 19
  • R2(config-if)# ip helper-address 10.2.0.250
  • R1(config)# interface G0/1
  • R1(config-if)# ip helper-address 10.2.0.250
  • R1(config)# interface G0/0
  • R1(config-if)# ip helper-address 10.1.0.254
  • R2(config)# interface G0/0
Explanation & Hint:

To enable hosts on the new subnet to receive IPv4 addresses from the DHCPv4 server, the network administrator needs to configure an IP Helper address on the router interface that is connected to the new subnet. The IP Helper address directs DHCP requests from hosts to the DHCP server located on a different subnet.

Based on the exhibit, the DHCP server has an IP address of 10.2.0.250 and is connected to R2. The new subnet is directly connected to R1’s G0/0 interface. Therefore, R1 needs to be configured to relay DHCP requests from the new subnet to the DHCP server.

The correct commands to accomplish this are:

  1. Enter the interface configuration mode for the interface connected to the new subnet:
    R1(config)# interface G0/0
  2. Configure the IP Helper address to point to the DHCP server’s IP address:
    R1(config-if)# ip helper-address 10.2.0.250

These commands tell R1 to forward DHCP requests that it receives on the G0/0 interface to the DHCP server at 10.2.0.250. DHCP requests are broadcast messages, and by default, routers do not forward broadcast messages across different subnets. The ip helper-address command enables the router to convert the broadcast to a unicast message to the specified IP address of the DHCP server, allowing the DHCP server to respond with an appropriate IP address lease for the host on the new subnet.

Therefore, the two commands the administrator should use are:

R1(config)# interface G0/0
R1(config-if)# ip helper-address 10.2.0.250

For more Questions and Answers:

CCNA 2 v7 – SRWE v7.02 Final Exam Answers Full 100%

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