The Certificate Trust List (CTL) file is an important file that the Cisco IP phone downloads during the bootup process What information is defined in the CTL file?
A. CTL contains a list of certificates and feature licenses that the IP phone is authorized to use
B. CTL specifies a list of configuration files that the phone can download from the TFTP server
C. CTL contains a list of Cisco Unified CM and TFTP servers that the IP phone is authorized to connect to.
D. CTL defines how the Cisco IP Phone communicates with Cisco Unified CM and provides a phone with its load ID
