How can a user restore ProxySG back to its default, factory settings, so that its IP address etc.
needs to be configured anew? (Choose all that apply)
(a) Press a button on ProxySG back panel (left arrow on front panel for some models) and hold it
for about 5 seconds
(b) Enter a CLI command ( restore-defaults factory-defaults ) and confirm it with y(yes) .
(c) Press a button in Management Console that drops the network configuration, and confirm the
warning dialog.

A.
a & b only

B.
a & c only

C.
b & c only

D.
All of the above

Explanation:
https://kb.bluecoat.com/index?page=content&id=KB1915&actp=LIST