Which of the following physical security controls are enclosed areas with a secure door on either end?

A. Fences
B. Bollards
C. Turnstiles
D. Mantraps


Answer: D
Explanation: Mantraps are enclosed areas with a secure door on either end that allow one person at a time. They can be used to protect against piggybacking.

Computer Science & Information Technology

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A _________ packet firewall tightens up the rules for TCP traffic by creating a directory of outbound TCP connections. There is an entry for each currently established connection and the packet filter will now allow incoming traffic to high numbered ports only for those packets that fit the profile of one of the entries in this directory.

Fill in the blank(s) with the appropriate word(s).

Computer Science & Information Technology

A(n) _________________________ program offers its members a wide range of reciprocal linking choices.

Fill in the blank(s) with the appropriate word(s).

Computer Science & Information Technology

A hard reset is a factory reset

Indicate whether the statement is true or false

Computer Science & Information Technology

Assume that at most 5 tuples in s match each tuple in r.

Compute the cost of using the following methods:
(a) Nested loops
(b) Block-nested loops
(c) Index-nested loops with a hash index on B in s. (Do the computation for both clustered and unclustered index.)

where r occupies 2,000 pages, 20 tuples per page, s occupies 5,000 pages, 5 tuples per page, and the amount of main memory available for block-nested loops join is 402 pages.

Computer Science & Information Technology