A Technician Must Configure a Firewall to Block External DNS

question 770

Multiple Choice

A technician must configure a firewall to block external DNS traffic from entering a network. Which of the following ports should they block on the firewall?

• A) 53
• B) 110
• C) 143
• D) 443

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Definitions:

Normal Model

Also known as the normal distribution, a bell-shaped curve that represents the distribution of many types of data where most values cluster around a mean value.

85th Percentile

A value below which 85% of the data points in a dataset fall, used in statistical analysis to understand distribution.

Snowfall

The amount of snow that falls in a specific area within a specific time period, usually measured in inches or centimeters.

Standard Deviation

A measure of the amount of variation or dispersion in a set of values, indicating how much the values differ from the mean of the data set.