Câu 43: 210-060: CCNA Collaboration Implementing Cisco Collaboration Devices (CICD)

While trying to register to Cisco UCM, a Cisco IP phone reports TFTP authorization failure. Which cause of this issue is true?

1. A. DHCP option 150 has the incorrect TFTP address configured. — đáp án hiện tại
2. B. The phone has a cabling issue.
3. C. The TFTP address for the phone is not in the CTL file.
4. D. A firewall in the network is blocking access.