An email administrator is tasked to set up a Linux mail server. One of the requirements is to close all ports except SSH, HTTPS, SMTP, POP3, and IMAP4. Which of the following commands should be used to see which ports are currently open on the email server? (Choose two.)
A. lsof
B. netstat
C. ipconfig
D. traceroute
E. ping
F. dig
Answer: A. lsof
B. netstat
Computer Science & Information Technology
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Computer Science & Information Technology
To obtain the arc sine of 0.5, use _______.
a. Math.asin(0.5) b. Math.asin(Math.toDegrees(0.5)) c. Math.sin(Math.toRadians(0.5)) d. Math.sin(0.5)
Computer Science & Information Technology