A _____ is two or more classful contiguous networks grouped together
a. Subnet
b. Supernet
c. Network
d. Superwork
b. Supernet
Explanation: A supernet is when two or more classful contiguous networks are grouped together. There is no superwork in network design.
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Joe is exchanging encrypted email with another party. Joe encrypts the initial email with a key. When Joe receives a response, he is unable to decrypt the response with the same key he used initially.Which of the following would explain the situation?
A. An ephemeral key was used for one of the messages B. A stream cipher was used for the initial email; a block cipher was used for the reply C. Out-of-band key exchange has taken place D. Asymmetric encryption is being used
What is the default subnet mask for a Class B network?
A. 255.0.0.0 B. 255.255.0.0 C. 255.254.0.0 D. 255.255.255.0