nokia 4A0-108 Exam Questions
Questions for the 4A0-108 were updated on : Nov 21 ,2025
Page 1 out of 17. Viewing questions 1-15 out of 247
Question 1
What is the first action the last hop router performs on receipt of an IGMP version 2 leave message?
- A. It sends a PIM (*, G) prune to the RP. B.It sends a PIM (S, G) prune to the source. C.It sends a PIM (* G) prune to the RP, and a PIM (S, G) prune to the source, D.It issues an IGMP Group Specific Query, E.It issues an IGMP General Query.
Answer:
D
Question 2
Which of the following about BGP Auto Discovery in an MVPN is TRUE?
- A. If BGP Auto Discovery is used, MPLS LSPs must be used for the P-tunnels in the MVPN. B.PIM state is maintained between PEs in the MVPN without PIM Hello messages. C.MP-BGP keepalive messages are used to maintain adjacencies between the PEs in an MVPN. D.MP-BGP can also be used as the multicast signaling protocol between the PEs and CEs.
Answer:
B
Question 3
What is the destination address of the MLDv2 report message?
- A. FF02::1 B.FF02::2 C.FF02::16 D.The specific multicast group address that the host is interested in.
Answer:
C
Question 4
Click the exhibit.
If the configuration shown is applied to all PE routers, and all other configuration is complete, how
many neighbors are displayed in the output of the command "PE1= show router 100 pirn neighbor"?
- A. There is one PIM neighbor. B.There are two PIM neighbors. C.There are three PIM neighbors. D.There is no PIM neighbor in router 100. All the PIM neighbors are in the base router.
Answer:
B
Question 5
Click the exhibit.
The network administrator of 2001 ;DB8:FEED::/64 wants to embed an RP for the network. The RP's
address is 2001:DB8:FEED::7. Which of the following multicast address ranges would suit this
purpose? (The exhibit shows the group-to-RP mapping for your reference only.)
- A. FF7x:730:2001:DBS:FEED::/96 (x is scope) B.FF7x:730:2001:DBS:FEED::/80 (x is scope) C.FF7x: 740:2001:DB8:FEED::/96 (x is scope) D.FF7x:740:2001:DB8:FEED::/80(x is scope)
Answer:
C
Question 6
In the Alcatel-Lucent SROS, which BGP address family is configured to support MCAST-VPN NLRI?
- A. vpn-ipv6 B.vpn-ipv4 C.mvpn-ipv6 D.mvpn-ipv4
Answer:
D
Question 7
For a BGP A-D signaled MVPN, which of the following situations requires the Source Active A-D
route?
- A. Provider network using PIM ASM. B.Provider network using PIM SSM. C.Customer network using PIM ASM. D.Customer network using PIM SSM.
Answer:
C
Question 8
Click the exhibit.
According to the display in the exhibit, which of the following is FALSE?
- A. Both the I-PMSI and the S-PMSI are instantiated by GRE tunnels. B.Both the I-PMSI and the S-PMSI use BGP Auto-Discovery for signaling. C.MP-BGP is used for customer multicast group signaling. D.The S-PMSI group address range is 232.10.10.0/24.
Answer:
C
Question 9
Which of the following regarding the BSR and the RP is TRUE?
- A. A router cannot be configured as a BSR-candidate and a static RP at the same time. B.A router cannot be a candidate-RP and a BSR-candidate at the same time. C.There is only one active RP in a multicast routing domain at any time. D.There is only one elected BSR in a multicast routing domain at any time.
Answer:
D
Question 10
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?
- A. Router A B.Router B C.Router C D.Router D
Answer:
B
Question 11
What is the OUI field of the MAC address for IPv4 multicast addresses?
- A. 00-01-5e B.00-01-5f C.01-00-5e D.01-00-5f
Answer:
C
Question 12
Which of the following about the S-PMSI is TRUE?
- A. The S-PMSI enables a PE to transmit packets to all other PEs in the same MVPN. B.The S-PMSI must be instantiated by MPLS P2MP P-tunnels. C.The S-PMSI is created and signaled by PIM or BGP Auto Discovery. D.An S-PMSI can be reused in multiple MVPNs.
Answer:
C
Question 13
Which of the following best describes how S-PMSI construction is initiated in Draft Rosen?
- A. The ingress PE sends an MDT Join TLV in the I-PMSI for a group address from the configured range. B.The egress PE sends an MDT Join TLV in the I-PMSI for a group address from the configured range. C.The ingress PE sends a PIM Join in the I-PMSI for a group address from the configured range. D.The egress PE sends a PIM Join in the I-PMSI for a group address from the configured range.
Answer:
A
Question 14
Which of the following statements regarding the BSR and RP is FALSE?
- A. A router can be configured as both a candidate-BSR and a candidate-RP. B.A router configured as a candidate-BSR can also be configured as a static RP. C.A router configured as a candidate-RP can also be configured as a static RP. D.A converged multicast network with BSR can have multiple routers elected as BSRs. E.A converged multicast network with BSR can have multiple routers elected as RPs.
Answer:
D
Question 15
How many bits of the IPv4 multicast address directly match bits in the multicast MAC address?
- A. 23 B.25 C.27 D.28
Answer:
A