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| Type | Number of exam questions | Exam name | Exam code |
| Free | 15 | Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) | 350-501 |
Question 1:
Which component is similar to an EVPN instance?
A. router distinguisher
B. MPLS label
C. IGP router ID
D. VRF
Correct Answer: D
Question 2:
Why do Cisco MPLS TE tunnels require a link-state routing protocol?
A. The link-state database provides segmentation by area, which improves the path-selection process.
B. The link-state database provides a data repository from which the tunnel endpoints can dynamically select a source ID.
C. Link-state routing protocols use SPF calculations that the tunnel endpoints leverage to implement the tunnel.
D. The tunnel endpoints use the link-state database to evaluate the entire topology and determine the best path.
Correct Answer: D
Question 3:
Refer to the exhibit
BGPsec is implemented on R1, R2, R3, and R4. BGP peering is established between neighboring autonomous systems. Which statement about implementation is true?
A. BGP updates from the iBGP peers are appended with a community of local-as.
B. BGP updates from all BGP peers are appended with a community of no-export.
C. BGP updates from the eBGP peers are appended with an additional AS path value that is statically set by the domain administrator.
D. BGP updates from the eBGP peers are appended with a BGPsec attribute sequence that includes a public key hash and digital signature.
Correct Answer: D
Question 4:
You are configuring MPLS traffic-engineering tunnels in the core. Which two ways exist for the tunnel path across the core? (Choose two.)
A. The dynamic path option is supported only with IS-IS.
B. Tunnels can be configured with dynamic path or explicitly defined path.
C. A zero bandwidth tunnel is not a valid option.
D. The bandwidth statement creates a “hard” reservation on the link.
E. Tunnel links inherit IGP metrics by default unless overridden.
Correct Answer: BE
Question 5:
Which configuration mode do you use to apply the mpls ldp graceful-restart command in IOS XE Software?
A. MPLS LDP neighbor
B. interface
C. MPLS
D. global
Correct Answer: D
Question 6:
After you analyze your network environment, you decide to implement a full separation model for Internet access and MPLS L3VPN services. For which reason do you make this decision?
A. It enables EGP and IGP to operate independently.
B. It enables you to choose whether to separate or centralize each individual service.
C. It is easier to manage a system in which services are mixed.
D. It requires only one edge router.
Correct Answer: B
Question 7:
Which statement about the Cisco MPLS TE forwarding adjacency feature is true?
A. It enables the MPLS core to use EIGRP as the routing protocol.
B. It enables the Cisco MPLS TE tunnel to be advertised into the running IGP.
C. It enables the tailend router to advertise routes to the headend router over the tunnel.
D. It enables the headend and tailend routers to establish a bidirectional tunnel.
Correct Answer: B
Question 8:
While implementing TTL security, you issue the PE(config-router-af)#neighbor 2.2.2.2 ttl-security hops 2 command. After you issue this command, which BGP packets does the PE accept?
A. to 2.2.2.2, with a TTL of 2 or more
B. from 2.2.2.2, with a TTL of less than 2
C. to 2.2.2.2, with a TTL of less than 253
D. from 2.2.2.2, with a TTL of 253 or more
Correct Answer: D
Reference: https://www.cisco.com/c/en/us/td/docs/ios/12_2sx/feature/guide/fsxebtsh.html#wp1059215
Question 9:
Refer to the exhibits.
Which information is provided for traceback analysis when this configuration is applied?
A. source interface
B. packet size distribution
C. IP sub-flow cache
D. BGP version
Correct Answer: C
Question 10:
Refer to the exhibit
R1 is connected to two service providers and is under a DDoS attack.
Which statement about this design is true if URPF in strict mode is configured on both interfaces?
A. R1 drops all traffic that ingresses either interface that has a FIB entry that exits a different interface.
B. R1 drops destination addresses that are routed to a null interface on the router.
C. R1 permits asymmetric routing as long as the AS-PATH attribute entry matches the connected AS.
D. R1 accepts source addresses on interface gigabitethernet0/1 that are private addresses.
Correct Answer: A
Question 11:
Refer to the exhibit
Router 1 was experiencing a DDoS attack that was traced to interface gigabitethernet0/1. Which statement about this configuration is true?
A. Router 1 accepts all traffic that ingresses and egresses interface gigabitethernet0/1.
B. Router 1 drops all traffic that ingresses interface gigabitethernet0/1 that has a FIB entry that exits a different interface.
C. Router 1 accepts source addresses that have a match in the FIB that indicates it is reachable through a real interface.
D. Router 1 accepts source addresses on interface gigabitethernet0/1 that are private addresses.
Correct Answer: C
Question 12:
Refer to the exhibit An engineer is preparing to implement data plane security configuration. Which statement about this configuration is true?
A. Router 2 is the router receiving the DDoS attack.
B. Router 1 must be configured with uRPF for the RTBH implementation to be effective.
C. Router 1 is the trigger router in an RTBH implementation.
D. Router 2 must configure a route to null 0 for network 192.168.1.0/24 for the RTBH implementation to be complete.
Correct Answer: C
Question 13:
Which configuration modifies Local Packet Transport Services hardware policies?
A. Option A
B. Option B
C. Option C
D. Option D
Correct Answer: C
Question 14:
Which additional feature does MPLS DiffServ tunneling support?
A. matching EXP and DSCP values
B. PHB layer management
C. using GRE tunnels to hide markings
D. interaction between MPLS and IGP
Correct Answer: B
Question 15:
You are creating new Cisco MPLS TE tunnels. Which type of RSVP message does the headend router send to reserve bandwidth on the path to the tail-end router?
A. path
B. tear
C. error
D. reservation
Correct Answer: A
Reference: https://packetpushers.net/rsvp-te-protocol-deep-dive/
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