In an inter-AC roaming scenario, which of the following statements about the AC\\\\\\\\\\\\\\\'s mobility group are false?

Hi simon.waweru,
The answer is ABD.
The roaming group server can be an AC outside the roaming group or an AC selected in the roaming group.

In an inter-AC roaming scenario, which of the following statements about the AC's mobility group are false?

A. STAs can roam only between ACs in the same mobility group.

=== This is correct. You can refer to Configuring a Mobility Group.

B. ACs in the same mobility group encapsulate and transmit roaming information over the DTLS extended tunnel.

=== Well, the DTLS encryption is not mandatory, but actually, ACs in the same mobility group encapsulate and transmit roaming data over the AC tunnel. You can get the information at (Optional) Configuring DTLS Encryption of an Inter-AC Tunnel.

C. The mobility server must be an AC in the local mobility group.

=== Yes. You can find the related information at mobility-server.

D. A mobility server needs to be specified for member ACs in a mobility group.

=== Yes.

Hi simon.waweru,
I'm sorry, I was wrong.
The answer is BC.

For A, you can refer to Configuring a Mobility Group.

For C and D, you can refer to Configuring a Network Architecture of WLAN Roaming.