Câu 21: 210-065: CCNA Collaboration Implementing Cisco Video Network Devices (CIVND)

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

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