Which value can be measured by the circuitry on a wireless NIC to determine if it is clear to send its transmission?

Which of the following is the BEST protocol to use for securely transferring large files?

A. Telnet B. SSH C. SFTP D. FTP

____ modes define how an object interacts with other objects, specifically with respect to tonal adjustments.

a. Default b. Threshold c. Shading d. Blending