Refer to the exhibit.
Which two statements about the implementation are true? (Choose two.)
A.
The PPP multilink protocol header is omitted on delay-sensitive packets.
B.
The maximum number of fragments is 1.
C.
Small real-time packets are multilink-encapsulated.
D.
A transmit queue is provided for smaller packets.
Previous implementations of Cisco IOS Multilink PPP (MLP) include support for Link
Fragmentation Interleaving (LFI). This feature allows the delivery of delay-sensitive packets, such
as the packets of a Voice call, to be expedited by omitting the PPP Multilink Protocol header and
sending the packets as raw PPP packets in between the fragments of larger data packets. This
feature works well on bundles consisting of a single link. However, when the bundle contains
multiple links there is no way to keep the interleaved packets in sequence with respect to each
other.
The Multiclass Multilink PPP (MCMP) feature in Cisco IOS Release 12.2(13)T addresses the
limitations of MLP LFI on bundles containing multiple links by introducing multiple data classes.
With multiclass multilink PPP interleaving, large packets can be multilink-encapsulated and
fragmented into smaller packets to satisfy the delay requirements of real-time voice traffic; small
real-time packets, which are not multilink encapsulated, are transmitted between fragments of the
large packets. The interleaving feature also provides a special transmit queue for the smaller,
delay-sensitive packets, enabling them to be transmitted earlier than other flows. Interleaving
provides the delay bounds for delay-sensitive voice packets on a slow link that is used for other
best-effort traffic.
References:
http://www.cisco.com/c/en/us/td/docs/ios/dial/configuration/guide/12_4t/dia_12_4t_book/dia_multic
lass_link_ppp.pdf
http://www.cisco.com/c/en/us/td/docs/routers/access/500/520/software/configuration/guide/520_S
CG_Book/520scg_concepts.html
Thanks Scooby!