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Q51. Refer to the exhibit. 

What is the status of the L2 tunnel between PE1. PE2. and the Layer 2 switches? 

A. The Layer 2 tunnel is up, and SW1 becomes the root bridge for VLAN 10. 

B. The Layer 2 tunnel is down, due to the ACL that is applied on the PE2 interface. 

C. The Layer 2 tunnel is up, but no BPDUs are exchanged unless an extra configuration is applied. 

D. The Layer 2 tunnel is down, due to the MTU mismatch between SW1 and SW2. 



Drag and drop the IOS XR NTP access group options on the left to the right from the least restrictive (top) to the most restrictive order (bottom). 


Q53. A company is deciding between an HVR and SVR solution in order to finalize a virtualization project proposal. Which is an advantage of a HVR solution versus a SVR solution? 

A. A HVR solution implements dedicated data plane resources. 

B. A HVR solution implements shared control plane resources. 

C. A HVR solution introduces significant contention of resources. 

D. A HVR solution implements dedicated chassis resources. 



Comparison of Virtualized Routing Architectures 

Category Hardware-Isolated Virtual Router Software-Isolated Virtual Router 

Control plane resources (CPU, memory) 



Data plane resources (forwarding engine, queues) 



Chassis resources (power supplies, blowers, fabric) 



Management, configuration 


Typically shared, but varies depending on degree of virtualization 

Connections between virtualized routing entities 

Typically external 

Typically internal, but possibly external 

Per-chassis scalability (routing adjacencies, prefixes) 

Increased with additional logical routers 

Unaffected by additional virtual routers 

Reference: 1-512753_ns573_Networking_Solutions_White_Paper.html 

Q54. Network Operations team has configured the routers with the logging buffered warnings command. Which three severity levels appear in the router syslog? (Choose three.) 

A. errors 

B. notifications 

C. informational 

D. alerts 

E. debugging 

F. emergencies 

Answer: A,D,F 

Q55. Refer to the exhibit. Two MPLS TE tunnels are configured with a total bandwidth guarantee of 100 Mbps. However, Tunnel 1 has a requirement to have one-fifth of this total bandwidth. Which two configurations accomplish this goal? (Choose two.) 

A. Configure tunnel mpls traffic-eng bandwidth 20000 under the Tunnel 1 interface. 

B. Configure bandwidth 20000 under the Tunnel 1 interface. 

C. Configure tunnel mpls traffic-eng bandwidth 80000 under the Tunnel 2 interface. 

D. Configure bandwidth 80 Mbps under physical interfaces in the path PE1-P2-PE2. 

E. Configure bandwidth 20 Mbps under physical interfaces in the path PE1-P1-PE2 

F. Configure bandwidth 80000 under the Tunnel 2 interface. 

Answer: A,C 

Explanation: See Configuration Guide 

Q56. A network engineer needs to connect two core switches that use Gigabit Ethernet interfaces in an MPLS backbone and that are separated by a distance of 60 km. Which Cisco GBIC achieves this goal? 

A. Cisco 1000BASE-T GBIC 

B. Cisco 1000BASE-SX GBIC 

C. Cisco 1000BASE-LX/LH GBIC 

D. Cisco 1000BASE-ZX GBIC 




Refer to the exhibit. 

PE1 and PE2 has a Layer 2 VPN over a GRE tunnel. This GRE tunnel built between P1 and P2 has LDP enabled. Consider a packet capture of the packets from CE1 and CE2 at P1 and R1 link. Drag the headers on the left and drop them on the right in the order of the encapsulation, starting from the inner header (at the top) to the outer header (at the bottom). 


Q58. Which are the two fundamental ways in which IEEE 1588 differs from SyncE? (Choose two.) 

A. In addition to frequency synchronization, it achieves ToD synchronization to achieve phase alignment which is required for multi-channel communication. 

B. It is a purely-based solution, with the actual clock values being passed inside the payloads of special packets dedicated to that task. 

C. It offers two major changes over traditional Ethernet to make it suitable for clock distribution: a mandated clock accuracy and the ESMC protocol for clock selection, distribution, management, traceability, and failover. 

D. SyncE is a Cisco proprietary ToD technology where IEEE 1588 is a industry standard recommended for interoperability across vendor devices. 

E. IEEE 1588 applies to voice-only systems or with low-bandwidth data traffic. 

Answer: A,B 


Q59. An engineer is working to provide high availability to a Service Provider core network. Which BGP command enables a backup path to be installed in the RIB and CEF tables? 

A. maximum-paths ibgp 

B. bgp additional-paths install 

C. maximum-paths eibgp 

D. bgp additional-paths select 

E. bgp advertise-best-external 




Drag and drop the IPFIX terminology on the left to the correct description on the right. Not all options will be used.