A router operates at which of the following layers of the OSI model?

A. Layer 2
B. Layer 3
C. Layer 4
D. Layer 5

Answer: B. Layer 3

Computer Science & Information Technology

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Element names may not contain _____.

A. letters B. the string "xml" C. blank spaces D. the underscore character

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Computer Science & Information Technology

When each object of a class maintains its own version of an attribute, the variable that represents the attribute is also known as a(n) _________ .

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

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Find the average, highest, and lowest age for students.

Write queries for the following. (Use tables created in Chapter 4 Lab Activity.)

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Computer Science & Information Technology

Which type of network topology is most popular?

a. bus b. Ethernet c. ring d. star

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Computer Science & Information Technology