Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?

A.
IETF

B.
ANSI Annex D

C.
Q9333-A Annex A

D.
HDLC

Explanation:
Cisco supports two Frame Relay encapsulation types: theCisco encapsulationand theIETF Frame
Relay encapsulation, which is in conformance with RFC 1490 and RFC 2427. The former is often used
to connect two Cisco routers while the latter is used to connect a Cisco router to a non-Cisco router.
You can test with your Cisco router when typing the command Router(config-if)# encapsulation
frame-relay ?on a WAN link. Note: Three LMI options are supported by Cisco routers are ansi, Cisco,
and Q933a. They represent the ANSI Annex D, Cisco, and ITU Q933-A (Annex A) LMI types,
respectively. HDLC is a WAN protocol same as Frame-Relay and PPP so it is not a Frame Relay
encapsulation type.