Which three are characteristics of IPv6? (Choose three.)

A.
An IPv6 address is 128 bits long.

B.
An IPv6 header is 20 bits long.

C.
An IPv6 header contains the next header field.

D.
An IPv6 header contains the protocol field.

E.
IPv6 routers send RA messages.

F.
An IPv6 header contains the header checksum field.