Before answering the questions read the appendix.

What is the size of a MAC $($physical$)$ Address? Ans: A MAC address is a $48-$bit $(6-$byte$)$ unique identifier.

Which one of the following is a valid MAC $($physical$)$ address?

a$)20-79-18-F5-C3-73=$ valid

f$)10-2F-34-00-2D-3E=$ valid

b$)20\mathrm{.}79\mathrm{.}18.F5.C3=$ invalid

g$)22-34-12-$FF$-56=$ invalid $($because $5$ groups of

c$)20$:$79$:$18$:$F5$:$C3$:$73=$ valid two$)$

d$)20,79,18,F5,C3,73=$ invalid

h$)82$:$23$:ee:$0$b:$00$:f$8=$ valid

e$)1A34\mathrm{.}2C45\mathrm{.}1567=$ valid