Cisco
640-461 · Question #140
640-461 Question #140: Real Exam Question with Answer & Explanation
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Question
An organization is using a centralized DHCP server for all IP phones. However, when the IP phones are powered up, the phones are unable to obtain an IP address. Which CLI command should be in the router configuration to ensure that the IP phones are able to reach the DHCP server?
Options
- Arouter(config)#helper-address
- Brouter(config-if)#ip helper-address
- Crouter(config-if)#helper-address
- Drouter(config)#ip helper-address
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