In the TACACS+ protocol, the sequence number is: (Multiple answer)

A.
An identical number contained in every packet.

B.
A number that must start with 1 (for the fist packet in the session) and increment each time a request orresponse is sent.

C.
Always an odd number when sent by the client.

D.
Always an even number when sent by the client and odd when sent by the daemon.