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Q1. You are the lead network designer hired by Service Provider XYZ to deploy CoS functionality on the core MPLS network (P routers). The goal of the network design is to provide a complete CoS solution to all customers that purchase services such as dedicated internet access, MPLS L3VPN, and L2VPN (pseudowire). Service Provider XYZ has these design requirements:
The network supports four service queues with equal treatment for delay, jitter, and packet loss.
Queues are numbered 0-3, where 0 is the default queue.
Three queues have one treatment.
One queue has either one or two treatments.
How would you design your solution to map the DSCP value properly so that the traffic is assigned to the respective queues in the Service Provider XYZ MPLS core network?
A. Classify traffic according to DSCP value into appropriate P router queues.
B. Map the appropriate DSCP value into the EXP field based on the number of queues in the MPLS P routers.
C. Map the appropriate DSCP value into the EXP field based on the number of queues in the MPLS PE routers.
D. Based on the DSCP value, traffic is mapped automatically into appropriate queues in the MPLS CE routers.
Answer: C
Q2. You are evaluating convergence characteristics of various interior gateway protocols for a new network design. Which technology allows link-state routing protocols to calculate paths to destination prefixes that are functionally similar to feasible successors in Enhanced Interior Gateway Routing Protocol?
A. Incremental Shortest Path First
B. Cisco Multiprotocol Label Switching Traffic Engineering Fast Reroute
C. Loop-Free Alternate Fast Reroute
D. partial route calculation
E. Fast-Flooding
Answer: C
Q3. You are designing a wireless LAN with the following components:
High-density indoor access point deployment
2.4-GHz and 5-GHz radios
802.11a, 802.11g, and 802.11n mode wireless LAN clients
Site survey results show negligible foreign WiFi and non-WiFi interference. What is the best method to decrease duty cycle (radio frequency utilization) and increase overall wireless LAN client performance for this design?
A. Disable all data rates below 12 Mb/s on all access points.
B. Decrease radio transmit power on all access points that report a high duty cycle.
C. Increase radio transmit power on all access points that report a high duty cycle.
D. Disable all data rates above 12 Mb/s on all access points.
E. Increase radio transmit power on all access points.
Answer: A
Q4. The Customer X network consists of an MPLS core, IS-IS running as IGP, a pair of BGP route reflectors for route propagation, and a few dozens of MPLS-TE tunnels for specific tactical traffic engineering requirements. The customer engineering department has some questions about the use of the Overload Bit in the IS-IS networks and how it could be used to improve their current network design. Which three options about the Overload Bit are true? (Choose three.)
A. It is not recommended on BGP route reflectors.
B. It only affects the use of the respective node as a transit node, and networks advertised within the LSPs of the node are still reachable.
C. It can be set on a router during the startup process for a fixed period of time.
D. It forces the midpoint MPLS-TE node to reoptimize the primary tunnels going through the OL node.
E. It can be set on a router until other interacting protocols have signaled convergence.
Answer: BCE
Q5. You are designing a Group Encrypted Transport virtual private network solution for an existing branch network. The existing network has the following characteristics:
. 50 remote sites (with an additional 30 remote sites expected over the next 3 years) . Connectivity between all sites is via Multiprotocol Label Switching Layer 3 virtual private network service from a single provider . Open Shortest Path First is the routing protocol used between provider edge and customer edge routers . The customer edge routers will become group members performing the encryption between sites
Which additional routing protocol would you use for the overlay routing between the group members?
A. Open Shortest Path First (with a different process ID)
B. Enhanced Interior Gateway Routing Protocol
C. No additional protocol is necessary.
D. External Border Gateway Protocol
E. Routing Information Protocol Version 2
F. Next Hop Resolution Protocol
Answer: C
Q6. Refer to the exhibit.
After this new OSPF design with per-packet load balancing was implemented, Host A reported that large file downloads from Server A became slow and sometimes failed. The operations team discovered that packets are arriving out of order on R1. Which cost-conscious redesign action will fix the issue?
A. Upgrade all links to 10 Gbps.
B. Add an IP SLA probe on R1 and R4.
C. Adjust the OSPF auto-cost reference bandwidth on R4.
D. Adjust the OSPF auto-cost reference bandwidth on all routers.
Answer: D
Q7. Refer to the exhibit.
Which technology could be used in this design to provide link recovery and high traffic capacity?
A. Rapid PVST
B. MST
C. PAgP
D. Flex Links
Answer: C
Q8. A network designer is redesigning an enterprise campus network to ensure that Ethernet switches proactively attempt to reconnect after a fiber cut. In the design, they will have to address areas where fiber cuts exist on campus from past troubleshooting, where a single fiber is disconnected in the fiber pair, leading to looping. Which feature could be implemented in the design to allow the Spanning Tree Protocol on the switches to be protected?
A. loop guard
B. UniDirectional Link Detection
C. UniDirectional Link Detection aggressive mode
D. root guard
Answer: C
Q9. What are two functions of an NSSA in an OSPF network design? (Choose two.)
A. It overcomes issues with suboptimal routing when there are multiple exit points from the area.
B. It allows ASBRs to inject external routing information into the area.
C. An ASBR advertises Type 7 LSAs into the area.
D. An ABR advertises Type 7 LSAs into the area.
E. It uses opaque LSAs.
Answer: BC
Q10. ACME Corporation is deploying a new HR application that requires the network infrastructure to monitor and react to certain conditions in the network. Which feature should be used to meet this design requirement?
A. Cisco IOS Embedded Event Manager
B. IP SLA
C. reflexive ACLs
D. route maps
E. SOAP
F. exit status
Answer: A
Q11. What is the definition of the ITIL framework?
A. an ISO framework that establishes a model for network management and contains guidelines for managing objects, the management database, and the application entity
B. a five-volume framework for service management that covers design, transition, and delivery of service, and from which the ISO 20000 was developed
C. a series of tools for process improvement that uses statistical methods to reduce defects in processes and manufacturing
D. a framework for enterprise architecture that provides a comprehensive approach for designing, planning, implementing, and governing an enterprise information architecture
E. a framework for enterprise IP Address Management (IPAM) based on the IANA trusted IP lease allocation scheme
Answer: B
Q12. You need to redesign your NMS system so that it can collect information without causing adverse effects in the network, such as high CPU utilization on network devices and network instability. Which two options will minimize the impact of the trusted NMS polling your network in this situation? (Choose two.)
A. Implement SNMP community restrictions that are associated with an ACL.
B. Unload unused MIBs from the network devices.
C. Prevent polling of large tables through the use of SNMP OID restrictions.
D. Disable unused OIDs and MIBs on the NMS systems.
Answer: CD
Q13. Your company will attach to a new Gigabit Ethernet-based wide area network from the local service provider for remote connectivity. Each connection will have a 150 Mb/s committed information rate. For the design of this new service, which QoS mechanism should be used to ensure low packet loss toward the service provider network?
A. shaping
B. policing
C. CBWFQ
D. RED
Answer: A
Q14. Your customer asks you to assist with their traffic policy design. They want to guarantee a minimum amount of bandwidth to certain traffic classes. Which technique would you advise them to implement?
A. Modular QoS CLI
B. committed accessrRate
C. policy-based routing
D. traffic shaping
Answer: A
Q15. Refer to the exhibit.
In this network design, where should summarization occur to provide the best summarization and optimal paths during a single-failure incident as well as during normal operation?
A. a single identical summary for all the branch offices placed on routers 1A, 1B, 2A, and 2B
B. two summaries on 1A and 1B, and two summaries on 2A and 2B
C. a single identical summary on 3A and 3B
D. a single summary on each aggregation device for the branches connected to them
Answer: C