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Denial of service (DoS) attacks are larger in scope than distributed denial of service (DDoS) attacks.

A dictionary password attack is a type of attack in which one person, program, or computer disguises itself as another person, program, or computer to gain access to some resource.

Hypertext Transfer Protocol (HTTP) is the communications protocol between web browsers and websites with data in cleartext.

Which group is the most likely target of a social engineering attack?

Rootkits are malicious software programs designed to be hidden from normal methods of detection.

Suppose we have the matrices

In the previous question we showed that

Which of the following augmented matrices represents an inconsistent system of linear equations?    A)

Let A be a 3 x 3 matrix and

Let A be an 5 x 4 matrix.  Choose the best answer from the options given to answer the question.   The columns of the matrix A are linearly independent if and only if A has how many pivots?    A) The matrix A will have to have 4 pivot columns.  This would mean that has only the trivial solution as there are no free variables.    B) The matrix A will have to have 4 pivot rows.  Then all matrix equations will have at least one solution so the columns are linearly independent.   C) The matrix A must have 5 pivot columns.  This is because any column will be a pivot column if linearly independent.  D ) The matrix A must have 5 pivot rows.  Of there is a pivot in every row, then there are no free variables when solving   .  So the columns will be linearly independent.  Of the choices, [1] is the most appropriate.