How does an access point know if a wireless data packet is intended for its network?
What will be an ideal response?
802.11 wireless LAN devices use an SSID to identify what wireless data traffic
is allowed to connect to the network.
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Consider a deadlock detection scheme for a single server. Describe precisely when edges are added to and removed from the wait-for-graph.
Illustrate your answer with respect to the following transactions T, U and V at the server.
When U releases its write lock on ai, both T and V are waiting to obtain write locks on it. Does your scheme work correctly if T (first come) is granted the lock before V? If your answer is ‘No’, then modify your description.
Which of the following is NOT true about reports based on queries?
A) A macro should be created to run a query and then a report. B) When a report is based on a table with records, you can run the report and there will always be records in the report because there are always records in the table. C) A query does not store any records, so if a report is run on a query with no records, the report will have no records. D) Instructions should always be provided so the user knows what steps to take to successfully run a query or report.
?To instruct the computer to perform a calculation, programmers use a(n) _______ expression, which contains values and operators, such as + and -.
Fill in the blank(s) with the appropriate word(s).
"Email" is short for ____.?
A. ?encoded mail B. ?ethernet mail C. ?electronic mail D. ?everyday mail