Which of the following answers are true about IPv$4$ and IPv$6?$

a$.$

IPv$4$ is $32$ bits IP address. It can support up to $2^32$ addresses. IPv$6$ is $128$ bits IP address. It can support up to $2^128$ addresses.$$

b$.$

IPv$6$ provides better support to QoS than IPv$4.$

c$.$

Simplified header format in IPv$4$ and fixed header format in IPv$6.$

d$.$

IPv$4$ uses Address Resolution Protocol $($ARP$)$ to find a physical address associated with an IPv$4$ address. IPv$6$ embeds these functions within IPv$6$ itself as part of the algorithms for stateless autoconfiguration and neighbor discovery using Internet Control Message Protocol version $6($ICMPv$6).$ That is$,$ there is no such thing as ARP$6.$

e$.$

Dynamic Host Configuration Protocol $($DHCP$)$ and File Transfer Protocol $($FTP$)$ do not support IPv$6.$

f$.$

All of the above.

g$.$

None of the ablve.