Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR)377 questions across 38 pages are complete and free, with no account or card.
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Why do packet loops occur during the configuration of BIDIR-PIM?
Answer: B
Reference: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9600/software/release/16-12/configuration_guide/ip_mcast_rtng/ b_1612_ip_mcast_rtng_9600_cg/configuring_pim.html
Source: Adapted from community discussion — nolbi
Refer to the exhibit. A network administrator is implementing IGMP to enable multicast feed transmission to the receiver. Which configuration must the administrator deploy on GW1 to permit IGMP joins only to the assigned (S, G) feed?
Answer: C
Answer is correct and worth reading why the two entries are required. https://content.cisco.com/chapter.sjs?uri=%2Fsearchable%2Fchapter%2Fcontent%2Fen%2Fus%2Ftd%2Fdocs%2Fios-xml%2Fios%2Fipmulti%2Fcommand%2Fimc-cr-book%2Fimc_i1.html.xml#wp9202555670 "Specifically, if an IGMP report with (S1, S2...Sn, G) is received, first the group (0, G) is checked against the access list statements. If the group is denied, the entire IGMP report is denied. If the group is permitted, each individual (S, G) pair is checked against the access list. Denied sources are taken out of the IGMP report, thereby denying any sources that match the access list from sending to the group."
Source: Adapted from community discussion — JoostAtExamtopics
Refer to the exhibit. Router 4 is added to the network and must be in the same area as router 1. Which NET should the engineer assign?
Answer: D
A network engineer is implementing a QoS policy for outbound management traffic classification and marking on a CPE device with these requirements: ✑ Management protocols must be marked with DSCP AF class 2 with low drop probability. ✑ Monitoring protocols must be marked with DSCP AF class 1 with low drop probability. ✑ All remaining traffic must be marked with a DSCP value of 0. Which configuration must the engineer implement to satisfy the requirements?
Answer: A
A is correct. af10 as far as I can tell does not exist. Options B and D are eliminated. af23 has high drop probability. Option C is eliminated https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus1000/sw/4_0/qos/configuration/guide/nexus1000v_qos/qos_6dscp_val.pdf
Source: Adapted from community discussion — EdgardoAC
What occurs when a high bandwidth multicast stream is sent over an MVPN using Cisco hardware?
Answer: D
According to the doc at https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_mvpn/configuration/xe-3s/imc-mvpn-xe-3s-book/imc_cfg_mc_vpn.html#GUID-60B1EC78-3A10-447E-BEBE-9F076511FBCB Data MDTs are created only for (S, G) multicast route entries within the VRF multicast routing table. They are not created for (*, G) entries regardless of the value of the individual source data rate. So D is correct.
Source: Adapted from community discussion — GustavBP
An engineer is implementing IGMP with SSM on a multicampus network that supports video streaming. Which task must the engineer perform as part of the process?
Answer: D
An engineer must extend Layer 2 between two campus sites connected through an MPLS backbone that encapsulates Layer 2 and Layer 3 data. Which action must the engineer perform on the routers to accomplish this task?
Answer: C
Which statement describes the advantage of a Multi-Layer control plane?
Answer: C
I think C is the correct answer in this question. There is is nothing about multivendor config capabilities in multi layer control plane.
Source: Adapted from community discussion — wilmo
A network operator needs to implement PIM-SSM multicast configuration on a customer's network so that users in different domains are able to access and stream live traffic. Which two actions must the engineer perform on the network to make the streaming work? (Choose two.)
Answer: AC
A and C are the correct answers. SSM is suitable for use when there are well-known sources either within the local PIM domain or within another PIM domain. The MSDP, which is needed for interdomain multicast routing when regular PIM-SM is used within a domain, is no longer needed for SSM. ^ This is as per Cisco
Source: Adapted from community discussion — [Removed]
Which protocol is used for communication between the PCE and PCC?
Answer: C
A Path Computation Element Protocol (PCEP) session is a TCP session between a PCC and a PCE with protocol messages. The PCEP functions are verified based on the PCC functions. The configuration and verification show that the request is accepted and path computation is provided based on PCReq message from the client. The passive reporting enables a router to report a tunnel instead of delegating it to a PCE. The PCE is aware of the tunnel even though it cannot modify the tunnel.
Source: Adapted from community discussion — mabrinaldi
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