How can an administrator mount an image to install a hot-fix containing an updated security patch?

The most widely used encryption scheme is based on the _________ adopted in 1977 by the National Bureau of Standards.

A. AES B. 3DES C. CES D. DES

Which of the following statements about navigating through snippets is false?

a. The up and down arrow keys navigate backwards and forwards through the current interactive session’s snippets. b. Pressing Shift+Enter re-executes the snippet that’s displayed. c. In IPython, every recalled snippet that you execute gets a new ID. d. All of the above statements are true.