Which of the following statements best describes the goal of the physical layer of the OSI model?
A. It is responsible for addressing of the packets.
B. It defines the characteristics of the network hardware.
C. It is responsible for establishing connections and terminations between the computers.
D. It is responsible for the transfer of data.
Answer: B
Explanation: The physical layer of the OSI model defines the characteristics of the network hardware.
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____________________ keys are limited-use symmetric keys for temporary communications; they allow two organizations to conduct quick, efficient, secure communications based on symmetric encryption.
Fill in the blank(s) with the appropriate word(s).