A network engineer is configuring a routed interface to forward broadcasts of UDP 69, 53, and 49 to 172.20.14.225. Which command should be applied to the configuration to allow this?

ccnp-dump
ccnp-route-dump
ccnp-route

#1

A network engineer is configuring a routed interface to forward broadcasts of UDP 69, 53, and 49 to 172.20.14.225. Which command should be applied to the configuration to allow this?
A. router(config-if)#ip helper-address 172.20.14.225
B. router(config-if)#udp helper-address 172.20.14.225
C. router(config-if)#ip udp helper-address 172.20.14.225
D. router(config-if)#ip helper-address 172.20.14.225 69 53 49

Correct Answer: A

Explanation:
To let a router forward broadcast packet the command ip helper-address can be used.
The broadcasts will be forwarded to the unicast address which is specified with the ip helper command.
ip helper-address {ip address}
When configuring the ip helper-address command, the following broadcast packets will be forwarded by the
router by default:
TFTP – UDP port 69
Domain Name System (DNS) ?UDP port 53
Time service – port 37
NetBIOS Name Server – port 137
NetBIOS Datagram Server – port 138
Bootstrap Protocol (BOOTP) – port 67
TACACS UDP port 49