What type of communications rely on a timing mechanism using either an independent clock or a time stamp embedded in the communications?
A. Analog
B. Digital
C. Synchronous
D. Asynchronous
Answer: C. Synchronous
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Verify that selections commute—that is, for any relation r and any pair of selection conditions cond 1 and cond 2 , ? cond 1 (? cond 2 (r)) = ? cond 2 (? cond 1 (r)).
What will be an ideal response?
When a node has not recently sent a frame to another node, how does the node discover the correct MAC address to use for the IPv4 address of the destination node?
a. The sender sends an IPv4 query to the destination node to ask the node for its MAC address. b. The sender broadcasts an ARP request. c. The sender monitors traffic until it discovers the correct MAC address to use. d. The sender transmits a TCP SYN to the destination node.
The results of the risk analysis should be documented in a _________.
A. journal B. consequence C. risk register D. none of the above
In what types of systems might you expect to observe relatively uniform request distributions?
What will be an ideal response?