4A0-108 - Multicast Protocols
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Which of the following about data delivery is FALSE?
For unicast delivery, the source sends a single copy of each packet regardless of the number of receivers.
Which of the following about the S-PMSI is TRUE?
The S-PMSI is created and signaled by PIM or BGP Auto Discovery.
How many types of Auto-Discovery routes are defined for MCAST-VPN NLRI?
Which of the following about the I-PMSI is TRUE?
The I-PMSI is created and signaled by PIM or BGP Auto Discovery.
A BSR candidate message is seen with a higher priority than the existing BSR. Which of the following describes the action that occurs?
The higher priority router becomes the BSR immediately.
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.
Which of the following fields is used in the PATH message to uniquely identify an S2L Sub-LSP?
What is the destination address for MLDv2 general query?
Which of the following about Draft Rosen MVPN is TRUE?
Draft Rosen MVPN encapsulates customer multicast traffic in GRE tunnels.
Which entity periodically sends IGMP Host Membership Queries?
The router elected as Querier on a LAN.
Which of the following is a reason why using unicast flows to send data to multiple receivers is not a scalable solution?
The resources required by the sending device increases with each new receiver that is added
Which of the following regarding the BGP Shared Tree Join route is TRUE?
The PE with a receiver for C-multicast group sends a BGP Shared Tree Join update to the PE attached to the C-RP.
Four routers share a multi-access network. Router A is configured with a PIM DR priority of 10, Router B is configured with a PIM DR priority of 100, Router C and Router D are Alcatel-Lucent 7750 SRs set at the default value. Router D has the highest IP address. Which router is selected as the PIM DR on this multiaccess network?
Which of the following is NOT a function of Intra-AS I-PMSI A-D route?
To advertise the customer multicast group address.
Which protocol is used to establish the I-PMSI in Draft Rosen?
According to the output, multicast traffic of this MVPN service is encapsulated in which label when it arrives at this PE?
When forwarding a multicast frame, the normal behavior for a LAN switch with IGMP snooping enabled is to forward the frame based on the similar rules as if it were:
A unicast frame with a known destination in the forwarding table
Which of the following statements about MLD snooping is false?
MLD snooping snoops MLD report and done messages, not query messages
Why should the anycast RP address be a non-system address of a router?
The system address of a router must be a unique address within the domain, while the anycast address is configured on multiple routers within the domain.
What is the primary function of the RP?
It is the place where the source and receivers meet when establishing the initial MDT
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 MPJJNREACH_NLRI message to withdraw the S-PMSI A-D route.
Which of the following ranges is reserved for IPv6 SSM multicast addresses?
Which of the following statements regarding mCAC is false?
Multicast CAC measures the current bandwidth utilization on the physical links and then decides whether to accept a new channel or not
Which of the following is a name for PIM Sparse Mode operation that utilizes an RP?
Any Source Multicast
What is the range of IPv4 multicast addresses allocated for SSM?
Which of the following regarding multicast reliability is TRUE?
Reliability may be added with a higher layer protocol such as RTP (Real Time Protocol).
Which of the following is NOT an advantage of using P2MP LSP as P-tunnels that instantiate PMSIs?
P2MP LSP tunnels forward multicast traffic only to the PEs with interested receivers.
Which of the following are NOT characteristics of the many to many model of multicast data delivery? (Choose two)
Receivers are generally unknown by the source
Well suited for applications such as video on demand where each source sends a separate data stream to each of the many different receivers
Which of the following are mandatory functions of a multicast receiver on a multicast network using IGMP version 2? (Choose two)
Report their multicast group membership to their local router
Signal their local router as they join and leave multicast groups
In Draft Rosen, how does the PE process a PIM Join message received from its CE?
The PE encapsulates the PIM Join message in GRE and sends it to other PEs via I-PMSI.
In the Alcatel-Lucent SROS, which BGP address family is configured to support MCAST-VPN NLRI?
Which of the following pairs correctly completes the sentence below? When Draft Rosen is deployed, PEs exchange CEs' unicast routing information via_________and exchange CEs'multicast group information via____________.
Which features were introduced in IGMP version 3? (Choose two)
Report suppression was eliminated
A modified membership report to include Source address
Which of the following PIM messages are sent towards the RP? (Choose two)
(*, G) Join/Prune
(S, G, rpt) Join/Prune
After the switchover from Shared Path Tree to Source Path Tree, does a branch of the Shared Path Tree still exist between the diverging router (router where the Shared and Source Path Tree diverge) and the RP?
Yes, it exists until there is no receiver beyond the diverging router.
Which of the following commands will verify, either directly or indirectly, if PIM is configured on an interface on the Alcatel-Lucent 7750 SR? (Choose two)
show router pim interface
show router interface detail
In IPv6 multicast ASM mode, which of the following methods cannot be used to obtain the RP address?
Router solicitation message
Which two of the following addresses should not be used in a multicast network at the same time?
What is the OUI field of the MAC address for IPv4 multicast address?
What is the destination address for MLDv2 report?
When forwarding a multicast frame, normal behavior for a LAN switch (without IGMP snooping enabled) is to forward the frame as if it were:
A unicast frame with an unknown destination in the forwarding table
What will be the immediate action of the last hop router on receipt of an IGMP version 2 leave message?
It will issue an IGMP Group Specific Query
An end station receiving a broadcast packet will always process the data up to at least which layer of the OSI stack?
If a router receives a packet addressed to a broadcast destination, it will:
Drop the packet by default
Which of the following protocols are used for IPv6 multicast?
MLD and PIM SM
How does the RP get the first multicast data packet from source?
Via a Register Message which encapsulates the multicast traffic
An IGMP version 3 receiver signals EXCLUDE mode with an empty EXCLUDE list. What does this indicate?
It is willing to receive traffic from any source
Which of the following commands will verify the PIM DR on an interface on the Alcatel-Lucent 7750 SR?
Show router pim interface
Which of the following about the S-PMSI A-D route is FALSE?
It eliminates the periodic PIM Hello.
How many bits of the IP multicast address are copied directly to the multicast MAC address?