You are instructing a group of junior administrators on the OSI model. You've explained that the data link layer is the one that transfers information between adjacent network nodes. Several different protocols operate on this level, including the two sublayers, logical link control, and media access control. This layer also houses several authentication technologies.

What is an example of a data link layer authentication technology?

A

$802\mathrm{.}16$

B

$802\mathrm{.}1$x

C

$802\mathrm{.}11$

D

$802\mathrm{.}3$