4A0-108 Multicast Protocols (Exam 4)

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What is the DATA_DELAY_INTERVAL?

What is the DATA_DELAY_INTERVAL?

It is the delay before the source PE switches traffic from the I-PMSI to the S-PMSI.

It is the delay before the receiver PE prunes the S-PMSI.

It is the delay before the source PE sends MDT Join TLVs.

It is the delay before the source PE switches traffic from the S-PMSI to the I-PMSI when traffic rate
drops below the threshold.
Which protocol is used to establish the S-PMSI in Draft Rosen?

Which protocol is used to establish the S-PMSI in Draft Rosen?

PIM DM

Either PIM SSM or PIM ASM

PIM SSM

PIM ASM
In Draft Rosen, a PE router encapsulates customer multicast packets into provider ...

In Draft Rosen, a PE router encapsulates customer multicast packets into provider packets. What is the
destination IP address of the provider packets sent on the I-PMSI?

The destination group address of the customer packets.

A multicast group address selected from the range of addresses specified in the I-PMSI configuration.

The multicast group address configured for the I-PMSI.

The system IP address of the receiving PE.
Click the exhibit.Based on the output displayed, which of the following is TRUE?

Click the exhibit.

Based on the output displayed, which of the following is TRUE?

This router is a PE attached to the multicast source of group 239.1.1.1.

Router 192.168.1.2 is a PE attached to a receiver interested in group 239.1.1.1.

Router 1.1.1.1 is a PE attached to the multicast source of group 239.1.1.1.

Router 192.168.1.2 is a PE attached to the multicast source of group 239.1.1.1.
Which of the following about the I-PMSI is TRUE?

Which of the following about the I-PMSI is TRUE?

The I-PMSI enables a PE to transmit packets to a subset of PEs in the MVPN.

An I-PMSI can be reused in multiple MVPNs.

An I-PMSI cannot be instantiated by MPLS P2MP P-tunnels.

The I-PMSI is created and signaled by PIM or BGP Auto Discovery.
Which of the following is NOT required when configuring an MVPN with mLDP as its S...

Which of the following is NOT required when configuring an MVPN with mLDP as its S-PMSI?

The MVPN must be configured with auto-discovery default.

A data threshold must be specified for instantiating the S-PMSI.

The I-PMSI must also use mLDP.

A range of multicast group addresses must be specified for the S-PMSI tunnels.
Which of the following about distributing customer multicast group information via...

Which of the following about distributing customer multicast group information via BGP A-D is FALSE?

It supports the use of P2MP LSPs as PMSI tunnels.

Two new extended communities are applied to all multicast routes in the VPRN for UMH selection.

It supports both PIM ASM and PIM SSM in a customer network.

There are three new types of BGP A-D routes defined for distributing customer multicast group
information.
Click the exhibit.Which of the following statements is TRUE regarding the group ad...

Click the exhibit.
Which of the following statements is TRUE regarding the group address 239.1.1.1 in the BGP A-D
message?

239.1.1.1 is the destination multicast group address of this message.

239.1.1.1 is the 5-PMSI group address.

239.1.1.1 is the customer multicast group address.

239.1.1.1 is the I-PMSI group address.
Which of the following actions is not performed by a bud node along a RSVP-TE P2MP...

Which of the following actions is not performed by a bud node along a RSVP-TE P2MP LSP?

Label push operation

Label pop operation

Label swap operation

Packet replication
Which of the following is the BGP NLRI used for BGP Auto-Discovery in a MVPN?

Which of the following is the BGP NLRI used for BGP Auto-Discovery in a MVPN?

MP_REACH_NLRI

PMSINLRI

MP_UNREACH_NLRI

MCAST-VPN NLRI
Which of the following describes how customer multicast routing information is dis...

Which of the following describes how customer multicast routing information is distributed in NG MVPN?

Customer multicast routing information is distributed only with PIM.

Customer multicast routing information is distributed with either mLDP or RSVP-TE.

Customer multicast routing information is distributed only with MP-BGP.

Customer multicast routing information is distributed with either PIM or MP-BGP.
Click the exhibit.According to the output shown, which of the following statements...

Click the exhibit.
According to the output shown, which of the following statements is FALSE?

The S-PMSI is instantiated by GRE tunnels.

The customer is sending multicast traffic to group 239.1.1.1.

The I-PMSI group address is 232.10.10.0.

192.168.1.2 is the IP address of the multicast source.
The customer multicast network is running PIM SSM. The MVPN is using BGP A-D to di...

The customer multicast network is running PIM SSM. The MVPN is using BGP A-D to distribute C-
multicast routes. Which BGP route does a PE send to the core when it receives a PIM (S,G) Join from its
CE?

S-PMSI A-D route

Source Tree Join A-D route

Source Active A-D route

Shared Tree Join A-D route
Which of the following is NOT an advantage of using P2MP LSP as P-tunnels that ins...

Which of the following is NOT an advantage of using P2MP LSP as P-tunnels that instantiate PMSIs?

P-tunnels can be protected with fast reroute for better resiliency.

Traffic engineering of the P-tunnels is possible with P2MP LSPs.

PIM is no longer required in the provider core.

P2MP LSP tunnels forward multicast traffic only to the PEs with interested receivers.
In an MVPN that uses BGP Auto Discovery for both I-PMSI and S-PMSI, what action is...

In an MVPN that uses BGP Auto Discovery for both I-PMSI and S-PMSI, what action is taken by the ingress
when customer multicast traffic drops below the threshold?

The ingress PE sends a MP_REACH_NLRI message to activate the Intra-AS I-PMSI A-D route.

The ingress PE stops sending the Source Active A-D route.

The ingress PE sends a MPJJNREACH_NLRI message to withdraw the S-PMSI A-D route.

The ingress PE stops sending the S-PMSI A-D route.
Which of the following about the signaling of multicast group information in an MV...

Which of the following about the signaling of multicast group information in an MVPN service is TRUE when
MPLS P2MP tunnels are used?

BGP Auto-Discovery is used for the signaling of the PMSIs, while either mLDP or RSVP-TE P2MP is
used for the signaling of customer multicast group membership.

BGP Auto-Discovery is used for the signaling of the PMSIs, while either BGP Auto-Discovery or PIM is
used for the signaling of customer multicast group membership.

Either BGP Auto-Discovery or PIM is used for the signaling of the PMSIs, while either mLDP or RSVP-
TE P2MP is used for the signaling of customer multicast group membership.

BGP Auto-Discovery is used for the signaling of the PMSIs, as well as for the signaling of customer
multicast group membership.
Which of the following is NOT a characteristic of multicast?

Which of the following is NOT a characteristic of multicast?

Multicast relies on an existing IP routing infrastructure.

When PIM is used, the unicast routing topology has no impact on the multicast topology.

Multicast traffic may follow a different path than unicast traffic between the same two points.

A distinct multicast topology can be created instead of using the unicast topology.
Which of the following about data delivery is FALSE?

Which of the following about data delivery is FALSE?

For multicast delivery, the source sends a single copy of each packet regardless of the number of
receivers.

For anycast delivery, the source sends a single copy of each packet regardless of the number of
receivers.

For unicast delivery, the source sends a single copy of each packet regardless of the number of
receivers.

For broadcast delivery, the source sends a single copy of each packet regardless of the number of
receivers.
Which entity periodically sends IGMP Host Membership Queries?

Which entity periodically sends IGMP Host Membership Queries?

The router elected as Querier on a LAN.

All multicast-enabled routers on a LAN.

All routers on a LAN.

The first host to expire its local suppression timer.

Only the multicast-enabled hosts on a LAN.
When forwarding a multicast frame, normal behavior for a LAN switch (with IGMP sno...

When forwarding a multicast frame, normal behavior for a LAN switch (with IGMP snooping enabled) is to
forward the frame as if it were:

A unicast frame with a known destination in the forwarding table.

A unicast frame with an unknown source in the forwarding table.

A unicast frame with an unknown destination in the forwarding table.

A unicast frame with a known source in the forwarding table,

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Feb. 8, 2016, 3:25 a.m.

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