Answer:
Device Authentication
Explanation:
Device authentication allows the venue to restrict network access to authorized scanners but does not require individual ushers to sign in to the device. This seems an acceptable level of security for this environment, as the scanners are carefully controlled. Moving to any authentication scheme that requires user authentication would be unwieldy
Option C is correct............
Answer:
6 columns/items
Explanation:
<em>grid</em> starts off as an empty list ( [ ] ), so right now it has 0 items/columns.
After that, 3 new items ("frog", "cat", "hedgehog") have been appended to <em>grid</em>, it now has 3 items
Finally another 3 items are appended to <em>grid ("fish", "emu", "rooster"</em>), finally <em>grid</em> ends up with 6 items in total.
True, it uses two mirrors to project the image thought the viewfinder when the light passes through the lens it bounce on a mirror, then the light bounce again in a pentaprism or mirrors to project in the viewfinder