Question 1

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?

Accepted Answer

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.

Question 2

Refer to the exhibit. This output is included at the end of an output that was provided by a device using NETCONF. What does the code show?

Accepted Answer

A)  It shows that the full configuration is being modeled by YANG. 
B)  It shows NETCONF uses remote procedure calls. 
C)  It shows the hostname of the device as rpc-reply. 
D)  It shows that the running configuration is blank.

Question 3

Which two actions describe LSP delegation to PCE servers? (Choose two.)

Accepted Answer

A)  removing TE re-optimization timer timeouts 
B)  changing the precedence of any of the PCE servers 
C)  entering the mpls traffic-eng reoptimize command entering the mpls traffic-eng reoptimize command 
D)  adding a new PCE server with lower precedence than the primary PCE 
E)  adding a new PCE server with higher precedence than the primary PCE

Question 4

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?

Accepted Answer

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

Question 5

Refer to the exhibit. Which configuration must be applied to each of the four routers on the network to reduce LDP LIB size and advertise label bindings for the /32 loopback IP space only?

Accepted Answer

A)   
B)   
C)   
D)

Question 6

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?

Accepted Answer

A)  Gi0/0/0/1 and Gi0/0/0/0 become active 
B)  Gi0/0/0/1 and Gi0/0/0/0 remain standby 
C)  Gi0/0/0/0 becomes active; Gi0/0/0/1 remains standby 
D)  Gi0/0/0/1 becomes active; Gi0/0/0/0 remains standby

Question 7

Refer to the exhibits. Which information is provided for traceback analysis when this configuration is applied?

Accepted Answer

A)  source interface 
B)  packet size distribution 
C)  IP sub flow cache 
D)  BGP version

Question 8

Which MPLS design attribute can you use to provide Internet access to a major customer through a separate dedicated VPN?

Accepted Answer

A)  The Internet gateway router is connected as a PE router to the MPLS backbone. 
B)  The CE router supports VRF-Lite and the full BGP routing table. 
C)  The Internet gateway inserts the full Internet BGP routing table into the Internet access VPN. 
D)  The customer that needs the Internet access service is assigned to the same RTs as the Internet gateway.

Question 9

Refer to the exhibit. On R1, which output does the show isis neighbors command generate?

Accepted Answer

A)   
B)   
C)   
D)

Question 10

Refer to the exhibit. An engineer is preparing to implement link aggregation configuration. Which statement about this configuration is true?

Accepted Answer

A)  The switch port negotiates an EtherChannel if it receives LACP packets from a connected peer running passive mode. 
B)  The switch port actively sends packets to negotiate an EtherChannel using PAgP. 
C)  The switch port passively negotiates an EtherChannel if it receives PAgP packets from a connected peer. 
D)  The switch port accepts LACP and PAgP packets from a connected peer and negotiate an EtherChannel using the common EtherChannel mode.

Question 11

Refer to the exhibit. After implementing a new design for the network, a technician reviews the pictures CLI output as part of the MOP. Which two elements describe what the technician can ascertain from the ImpNull output? (Choose two.)

Accepted Answer

A)  Ultimate Hop Popping is in use for the prefix displayed. 
B)  Penultimate Hop Popping is in use for the prefix displayed. 
C)  Label 0 is used for the prefix displayed, but will not be part of the MPLS label stack for packets destined for 192.168.10.10. 
D)  Label 3 is in use for the prefix displayed and will be part of the MPLS label stack for packets destined for 192.168.10.10. 
E)  Label 0 is used for the prefix displayed and will be part of the MPLS label stack for packets destined for 192.168.10.10.

Question 12

Refer to the exhibit. Based on the show command output, which result is true after BGP session is established?

Accepted Answer

A)  The IOS XR router advertises and accepts all routes to and from eBGP neighbor 192.168.2.2. 
B)  The IOS XR router advertises all routes to the neighbor 192.168.2.2, but it does not accept any routes from 192.168.2.2. 
C)  No routes are accepted from the neighbor 192.168.2.2, nor are any routes advertised to it. 
D)  The IOS XR router does not advertises any routes to the neighbor 192.168.2.2, but it accepts any routes from 192.168.2.2.

Question 13

Refer to the exhibit. This configuration is being applied on an IOS XR router. Which statement about this configuration is true?

Accepted Answer

A)  It is used to enable gRPC. 
B)  It is used to create a streaming subscription with a 600-second interval. 
C)  It is used to set up configuration to poll network data. 
D)  It is used to create a streaming subscription with a 60-Second interval.

Question 14

When configuring traffic engineering tunnels in Cisco MPLS core network, you see the traffic is not tacking the expected path in the core. Which command do you use to quickly check path of a TE tunnel?

Accepted Answer

A) traceroute B) show mpls traffic-engineering tunnels C) Ping D) traceroute mpls ipv4

Question 15

Which service is a VNF role?

Accepted Answer

A)  Network 
B)  Firewall 
C)  Storage 
D)  Compute

Question 16

Refer to the exhibit. An engineer is implementing Auto-RP and reviewing the configuration of the PE-A. Which configuration permits Auto-RP messages to be forwarded over this interface?

Accepted Answer

A)  PE-A(config-if)#no ip pim bsr-border 
B)  PE-A(config-if)#ip igmp version 3 
C)  PE-A(config-if)#ip pim sparse-mode 
D)  PE-A(config-if)#ip pim sparse-dense-mode

Question 17

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 tailend router?

Accepted Answer

A)  path 
B)  tear 
C)  error 
D)  reservation

Question 18

Refer to the exhibit. While troubleshooting the network, a network operator with an employee id: 1234:55:678 is trying to ping XR1. Which result should the operator expect when trying to ping to an XR1 local address?

Accepted Answer

A)  AII ICMP traffic is dropped 
B)  AII ICMP traffic responds successfully 
C)  ICMP traffic works at a policed rate of 19 bytes per second every 100 ms 
D)  ICMP traffic works at a policed rate of 19 packets every 100 ms

Question 19

Refer to the exhibit. What is the effect of this configuration applied on the IOS XR router?

Accepted Answer

A)  It is used to enable gRPC 
B)  It is used to create a streaming subscription with a 600-second interval 
C)  It is used to set up configuration to poll network data 
D)  It is used to create a streaming subscription with a 60-second interval

Question 20

Refer to the exhibit. A network engineer is implementing an OSPF configuration. Based on the output, which statement is true?

Accepted 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. 
B)  In the ospfv3 1 area 1 ipv4 command, area 0 must be configured instead of area 1. In the ospfv3 1 area 1 ipv4 command, area 0 must be configured instead of area 1. 
C)  OSPFv3 cannot be configured for IPv4; OSPFv3 works only for IPv6. 
D)  "IPv6 routing not enabled" is just an informational message and OSPFv3 runs for IPv4 on interface FastEthernet0/0 anyway.

Exam 39: Implementing and Operating Cisco Data Center Core Technologies (DCCOR)