2 years ago

________ involves the use of the internet to steal important information.

1 answer:

5 0

Phishing involves the use of the Internet to steal important information.
Shoulder surfing refers to people spying on other people while they are using an ATM. Skimming a credit card refers to thieves using a device in ATMs to steal information from cards. Dumpster diving refers to picking trash from dumpsters.

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You have to communicate a signal in a language that has 3 symbols A, B and C. The probability of observing A is 50% while that o

Vlada [557]

Answer:

Huffman code is use for encoding the language. The entropy when calculated is 1.5.

Explanation:

Using Huffman Coding scheme to encode:

The huffman coding scheme is described in the attachment.

To find entropy; we use the formula given below:

H = ∑ $p log_{2} \frac{1}{p}$

where H = Entropy and p = probability

p(A) = 50% = 1/2

p(B) = 25% = 1/4

p(C) = 25% = 1/4

$H = \frac{1}{2} log_{2} 2 + \frac{1}{4} log_{2} 4+ \frac{1}{4} log_{2}4\\H = \frac{1}{2}(1) + \frac{1}{4}(2) + \frac{1}{4}(2)\\H = \frac{1}{2} + \frac{2}{4} + \frac{2}{4}\\H = \frac{1}{2} + \frac{1}{2} + \frac{1}{2}\\H = \frac{3}{2}\\H = 1.5$