Which of the following DNS records is used to identify a domain's SMTP server?

A. CNAME
B. PTR
C. MX
D. A

Answer: C. MX

Computer Science & Information Technology

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The subnet mask 255.255.255.0 is applied to a packet with the following IP addresses. Which subnet is the packet sent to? Show your work.

a. 10.20.35.12 b. 10.20.35.3 c. 10.50.35.6 d. 192.168.12.8

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Computer Science & Information Technology

Declaring instance variables ________ is known as data hiding or information hiding.

a. secure b. private c. static d. masked

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Computer Science & Information Technology

Download scanning will protect a system against all viruses

Indicate whether the statement is true or false.

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Computer Science & Information Technology

A ____ is an automated program that uses hyperlinks to jump between webpages, collecting data about each page as it proceeds.

A. plug-in B. spider C. cookie D. QR code

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Computer Science & Information Technology