Which two characteristics describe Ethernet technology? $($Choose two.$)$

a$.$ It uses unique MAC addresses to ensure that data is sent to and processed by the appropriate destination.

b$.$ It is supported by IEEE $802\mathrm{.}3$ standards.

c$.$ It uses a ring topology.

d$.$ It typically uses an average of $16Mbps$ for data transfer.

e$.$ It is supported by IEEE $802\mathrm{.}5$ standards.