A network has multiple VLANs with an IP address server located in VLAN 10. Clients in VLANs 20 and 30 are unable to obtain IP addresses from this server. As a network administrator, which command should you configure on the router interfaces connected to VLANs 20 and 30 to enable these clients to receive IP addresses?
Configure 'ip helper-address [server address]' on the router interfaces
Enable 'service ip-distribution' on the router
Configure 'ip address pool [pool name]' on the router interfaces
Configure 'ip relay-address [server address]' on the router interfaces
The ip helper-address [server address] command is used on router interfaces to forward broadcast messages, including Dynamic Host Configuration Protocol (DHCP) requests, as unicast to a specified server on a different subnet or VLAN. This allows clients in VLANs 20 and 30 to communicate with the IP address server in VLAN 10. The other commands either have incorrect syntax or serve different purposes: ip relay-address is not a valid command, ip address pool is used for defining Network Address Translation (NAT) pools, and service ip-distribution is not a valid command.
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Cisco CCNA 200-301
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