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350-501 practice questions 161–170

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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Question 161 · 377 in bank
DRAG DROP - Drag and drop the characteristics from the left onto the automation tool 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.
Show the answer figure
Answer: See figure below
Explanation
The first page of this doc from Cisco calls NETCONF "a standard transport protocol that communicates with network devices". I think that's one of the answers. https://www.cisco.com/c/en/us/td/docs/routers/ncs4000/software/programmability/guide/b-programmability-ncs4k/define-network-operations-with-data-models.pdf
Source: Adapted from community discussion — karen1337
References
Cisco documentation
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Question 162 · 377 in bank
Refer to the exhibit. A network engineer configures CPE-1 for QoS with these requirements: ✑ IPv4 and IPv6 traffic originated by the CPE-1 WAN IP address must be marked with DSCP CS3. ✑ IPv4 LAN traffic must be marked with DSCP CS1. IPv6 LAN traffic must be marked with DSCP default.
Which configuration must the engineer implement on CPE-1?
Show answer
Answer: D
Explanation
First line, its has be match-any (either IPv4 or IPv6) not match-all(both IPv4 and IPv6), so exclude option B and C. set ip dscp = IPv4 set dscp = IPv4 + v6 Check the last policy so has to be option D.
Source: Adapted from community discussion — ccie_race
References
Cisco documentation
Cisco documentation
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Question 163 · 377 in bank
Refer to the exhibit. An engineer is configuring IS-IS on ISP network. Which IS-IS configuration must an engineer implement on router AGG1 so that it establishes connectivity to router AGG6 via the BB3 core router?
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Answer: D
Explanation
Answer is D, since it is never mentioned they are different area, so we assummed it is same area. usually if different area they will mentioned somewheren in exhibit or must be L2-only link in the topology.. so....to reach AGG6 from AGG1, it will use Level-1 type (since we assume its same area). in this case A and B are eliminated. and now C or D?... "show clns protocol" output indicate wide metric is not set because Generate/Accept wide metrics: none "show clns interface gig2 or 3" output indicate "isis metric 2000" command apply under both interface command. so to established connectivity, metric value under int gi3 need to lower down from 2000 which is 1500. I will go for option D. I tested in lab. Thank you!
Source: Adapted from community discussion — cipikacipiki
References
Cisco documentation
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Question 164 · 377 in bank
Refer to the exhibit. A network engineer notices PE-21 convergence degradation due to the growing LSDB size of Level 2 areas in the network. The engineer decides to migrate router PE-21 from an inter-area design to an intra-area implementation. Inter-area routing must be accomplished via an ATT-bit set by the Level 1/Level 2 router. Which configuration must the engineer implement on PE-21 to complete the migration?
Show answer
Answer: D
Explanation
Answer is D " In order to reach Level 2 area, L1L2 router sets the Attach bit in Level1 LSP. Level1 router installs the default route in routing table, this route would point towards L1L2 router." https://www.cisco.com/c/en/us/support/docs/ip/ip-routing/200472-Configure-the-Attach-bit-set.html
Source: Adapted from community discussion — thejag
References
Cisco documentation
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Question 165 · 377 in bank
router(config)# route-map blackhole-trigger router(config-route-map)# match tag 777 router(config-route-map)# set ip next-hop 10.0.1.1 router(config-route-map)# set origin igp router{config-route-map)# set community no-export Refer to the exhibit. EIGRP is running across the core to exchange internal routes, and each router maintains iBGP adjacency with the other routers on the network. An operator has configured static routes on the edge routers R1 and R2 for IP address 10.0.1.1, which is used as a black hole route as shown. Which configuration should the operator implement to the management router to create a route map that will redistribute tagged static routes into BGP and create a static route to blackhole traffic with tag 777 that is destined to the server at 192.168.10.100?
Show answer
Answer: B
Explanation
Reference: https://www.cisco.com/c/dam/en_us/about/security/intelligence/blackhole.pdf
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Question 166 · 377 in bank
Select 3
Refer to the exhibit. Which three outcomes occur if the prefix list is added to the neighbor? (Choose three.)
Show answer
Answer: ACE
Explanation
Correct answers: A, C, E E: 192.168.0.0/17 is permitted as it matches the statement "greater or EQUAL 17", so it's a match and it terminates in the "permits" statement of the ALLOW prefix list
Source: Adapted from community discussion — blizzlondon
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Question 167 · 377 in bank
Refer to the exhibit. ISP ASN 65100 provides Internet services to router CE-1 and receives customer prefix 198.18.18.0/24 via eBGP. An administrator for the ISP is now provisioning RTBH services to provide on-demand data-plane security for the customer's IP space. Which route-map configuration must the administrator apply to router RTBH-1 to complete the implementation of RTBH services to CE-1?
Show answer
Answer: A
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Question 168 · 377 in bank
Refer to the exhibit. Routers P4 and P5 receive the 0.0.0.0/0 route from the ISP via eBGP peering. P4 is the primary Internet gateway router, and P5 is its backup. P5 is already advertising a default route into the OSPF domain. Which configuration must be applied to P4 so that it advertises a default route into OSPF and becomes the primary Internet gateway for the network?
Show answer
Answer: B
Explanation
Hi, in my understanding, answer B is correct: Routes are redistributed in OSPF as either type 1 (E1) routes or type 2 (E2) routes, with type 2 being the default. A type 1 route has a metric that is the sum of the internal OSPF cost and the external redistributed cost. A type 2 route has a metric equal only to the redistributed cost. If routes are redistributed into OSPF as type 2 then every router in the OSPF domain will see the same cost to reach the external networks. If routes are redistributed into OSPF as type 1, then the cost to reach the external networks could vary from router to router. The order of preference for OSPF as per RFC 2328 is : intra-area routes, O interarea routes, O IA external routes type 1, O E1 external routes type 2, O E2 This rule of preference cannot be changed. I hope this helps. Good luck.
Source: Adapted from community discussion — Panterarossa
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Question 169 · 377 in bank
Refer to the exhibit. An ISP provides shared VoIP Extranet services to a customer in VRF-100 with these settings: ✑ The VoIP services are hosted in the 198.19.100.0/24 space. ✑ The customer has been assigned the 198.18.1.0/29 IP address block. ✑ VRF-100 is assigned import and export route target 65010:100. Which configuration must the engineer apply to PE-1 to provision VRF-100 and provide access to the shared services?
Show answer
Answer: D
Explanation
import/export map does not work without route-target import/export. It just refines what gets imported from route-target. https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mpls/command/mp-cr-book/mp-e1.html#wp2441555563 The import map command associates a route map with the specified VRF. You can use a route map to filter routes that are eligible for import into a VRF, based on the route target extended community attributes of the route. The route map might deny access to selected routes from a community that is on the import list. The import map command does not replace the need for a route-target import in the VRF configuration. You use the import map command to further filter prefixes that match a route-target import statement in that VRF.
Source: Adapted from community discussion — mironto
References
Cisco documentation
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Question 170 · 377 in bank
Refer to the exhibit. The network engineer who manages ASN 65001 is troubleshooting suboptimal routing to the 198.18.15.0/24 prefix. According to the network requirements: ✑ Routing to IP destinations in the 198.18.15.0/25 block must be preferred via the EDGE-1 PE. ✑ Routing to IP destinations in the 198.18.15.128/25 block must be preferred via the EDGE-2 PE. ✑ More specific prefixes of the 198.18.15.0/24 block must not be advertised beyond the boundaries of ASN 64611. ✑ Routing to 198.18.15.0/24 must be redundant in case one of the uplinks on INT-R1 fails. Which configuration must the network engineer implement on INT-R1 to correct the suboptimal routing and fix the issue?
Show answer
Answer: A
Explanation
A. configure terminal route-policy ASN65001-SPECIFIC-OUT if destination in (198.18.15.0/25) then set community (no-export, peeras:65001) endif if destination in (198.18.15.0/24) then prepend as-path 65001 3 endif drop end-policy ! router bgp 65001 neighbor 100.65.0.1 address-family ipv4 unicast route-policy ASN65001-SPECIFIC-OUT out exit-address-family exit Note: "no-export" satisfy the requirement of question not going beyond 64611 D: the policy is "in" direction, wrong, though it hs "no-export"
Source: Adapted from community discussion — sushil_bhattacharjee
References
cisco.com documentation
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