Which two options are operating modes of Security Group Tag (SGT) Exchange Protocol
(SXP) peers? (Choose two.)

A.
listener

B.
broadcast

C.
neighbor

D.
transmitter

E.
speaker

Explanation:
http://www.cisco.com/c/en/us/td/docs/switches/lan/trustsec/configuration/guide/trustsec/sxp_config.html
the mode keyword specifies the role of the remote peer device:
local —The specified mode refers to the local device.
peer —The specified mode refers to the peer device.
speaker —Default. Specifies that the device is the speaker in the connection.
listener —Specifies that the device is the listener in the connection.