$15.$ Which of the following are tasks performed by the Network Access layer $($More than one task applies$)?$

a$.$

Verifies that incoming frames have the correct destination MAC $($Media Access Control$)$ address.

b$.$

Defines and verifies IP $($Internet Protocol$)$ addresses.

c$.$

Transmits and receives bit signals.

d$.$

Resolves MAC addresses by using IP addresses.

e$.$

Delivers packets efficiently.