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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Refer to the exhibit. A network engineer is implementing OSPF multiarea. Which command on interface G0/1 resolves adjacency issues in the new area?
Answer: A
Reference: https://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/118879-configure-ospf-00.html#:~:text=When%20Multi%2DArea% 20Adjacency%20is,which%20the%20ADJ%20is%20formed .
Source: Adapted from community discussion — Jondal
Refer to the exhibit. While troubleshooting a connectivity issue on router R2, a network engineer with an employee id: 1234:44:876 notices that although it detects three OSPF links from R1, the OSPF prefixes are missing from the routing table. What is the reason for the problem?
Answer: D
Answer is D. You can create an unnumbered OSPF link, however both sides need to be unnumbered and PtP. If one side is IP and the other unnumbered, OSPF stays in EXSTART and will eventually go DOWN due to to many retransmissions.
Source: Adapted from community discussion — nottoday2077
DRAG DROP -
Refer to the exhibit. An engineer wants to determine which paths are best, second best, third best, and fourth best. Drag and drop the peer addresses on the left to the corresponding BGP best-path selection order on the right. Select and Place:
This is an interactive task on the real exam — a drag-and-drop, hotspot or ordering question. There is nothing to select here, so the answer is shown below for reference.
Answer: See figure below
50.50.50.2 - recognised as best, (4 available, best #1) 40.40.40.2 - out of 3 left, LocalPref 200 beats 100 (set for 20.20.20.2 and 30.30.30.2) 20.20.20.2 - out of 2 left, AS_PATH is shorter here, [200 i] beats [300 300 i] 30.30.30.2- last choice
Source: Adapted from community discussion — Jondal
Refer to the exhibit. While troubleshooting the OSPF adjacency between routers R1 and R2, an engineer noticed that both routers are stuck in the EXCHANGE/ EXSTART state. What should the engineer fix to solve the ongoing issue?
Answer: C
I don't think there is just one answer. To me it looks like there is some many other issue. The area # format is weird and it doesn't match between R1 and R2. Also R1 network type is point to point and R2 is point to multipoint.
Source: Adapted from community discussion — ENTJ
What are two factors to consider when implementing NSR High Availability on an MPLS PE router? (Choose two.)
Answer: CD
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/15-sy/iro-15-sy-book/iro-nsr-ospf.pdf • OSPF nonstop routing (NSR) can significantly increase the memory used by OSPF during certain phases of its operation. CPU usage also can be increased. You should be aware of router memory capacity and estimate the likely memory requirements of OSPF NSR. For more information see Configuring OSPF NSR.For routers where memory and CPU are constrained you might want to consider using OSPF NSF instead.
Source: Adapted from community discussion — thejag
Refer to the exhibit. A network operator needs to shut down interface Gi0/0/0/2 for maintenance. What occurs to the interface states of Gi0/0/0/0 and Gi0/0/0/1?
Answer: D
D is correct. With same priority port Gi0/0/0/1 has the next lower port ID. So Gi0/0/0/1 becomes active and Gi0/0/0/0 standby
Source: Adapted from community discussion — craterman
Which statement about the Cisco MPLS TE forwarding adjacency feature is true?
Answer: B
Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_te_path_setup/configuration/xe-16/mp-te-path-setup-xe-16-book/mpls-traffic-engineering- forwarding-adjacency.pdf
Source: Adapted from community discussion — Charybdis
A network engineer must enable the helper router to terminate the OSPF graceful restart process if it detects any changes in the LSA. Which command enables this feature?
Answer: C
i think the correct answer is C: nsf ietf helper strict-lsa-checking as Answer A is an optional Command #nsf ietf helper disable
Source: Adapted from community discussion — Onny
Refer to the exhibit. A network engineer is implementing an OSPF configuration. Based on the output, which statement is true?
Answer: A
correct answer: A. OSPFv3 does not run for IPv4 on FastEthernet0/0 until IPv6 routing is enabled on the router and IPv6 is enabled on interface FastEthernet0/0 To enable OSPFv3 for IPv4, the following config is required: R1(config)#ipv6 unicast-routing R1(config-if)#ipv6 enable R1(config-if)#ospfv3 1 area 1 ipv4
Source: Adapted from community discussion — blizzlondon
Refer to the exhibit. A network engineer is implementing a BGP protocol. Which effect of the local-as keyword in this configuration is true?
Answer: D
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