Storage size of IPv4 and IPv6 addresses: How are they stored?
a) IPv4 addresses are stored in 32 bits; IPv6 addresses are stored in 128 bits.
b) IPv4 addresses are stored in 128 bits; IPv6 addresses are stored in 32 bits.
c) Both IPv4 and IPv6 addresses are stored in 64 bits.
d) IPv4 addresses are stored in 64 bits; IPv6 addresses are stored in 128 bits.