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Q1. Which two statements describe how including Cisco IPoDWDM proactive protection in an optical design would minimize packet loss in the event of a fiber cut? (Choose two).
A. It uses the FEC field on the OTN frame to trigger protection.
B. It uses a "not to exceed" predefined BER threshold to cause traffic redirection.
C. It reroutes the optical circuit after an event that impacts service.
D. It is effective both when you have redundant and nonredundant Layer 3 MPLS paths.
Answer: AB
Q2. You are designing a large Frame Relay WAN for a customer. The routing protocol is OSPF. What is the effect on the routing table if the WAN interfaces are configured as point-to-multipoint?
A. Only a route for the DR will be present in the routing table.
B. Configuring point-to-multipoint has no effect on the routing table. The route that is configured with the area command will be seen in the routing table.
C. Multipoint interfaces dynamically add the network of the connected interface.
D. Multipoint interfaces dynamically add a /32 route for each neighbor in the WAN.
Answer: D
Q3. What is a key benefit of a layered network design?
A. cost savings
B. increased security
C. increased flexibility
D. decreased broadcast
Answer: C
Q4. You have been asked to establish a design that will allow your company to migrate from a WAN service to a Layer 3 VPN service. In your design, you are keeping some WAN links between critical sites as a backup for this service. You plan to use OSPF as your IGP and BGP for the PE-CE protocol. When the Layer 3 VPN service is available, how will you prevent transit traffic over the backup links?
A. Redistribute routes at the CE as external type 1.
B. Redistribute routes at the CE as external type 2.
C. Use conditional advertisement only when the Layer 3 service is down.
D. Manually turn off the backdoor link when the Layer 3 service is up.
Answer: D
Q5. AS100 and AS200 each have two peering points in different parts of their network. AS100 would like to use one of the links and keep the other link as backup. What should be changed for the design inside AS100 for prefixes received from AS200?
A. MED
B. weight
C. AS-PATH
D. local preference
Answer: D
Q6. Refer to the exhibit.
You are asked to design this OSPF network to converge within 60 ms for unicast packets after a topology change due to a single link failure. Which technology can be enabled while conforming to the design requirements?
A. Loop-Free Alternates
B. BFD
C. IGP neighbor timer tuning
D. IGP SPF timer tuning
E. RSVP-TE Fast Reroute
Answer: A
Q7. You are a network designer and are responsible for ensuring that the network you design is secure. How do you plan to prevent infected devices on your network from sourcing random DDoS attacks using forged source addresses?
A. ACL-based forwarding
B. ACL filtering by destination
C. Unicast RPF loose mode
D. Unicast RPF strict mode
Answer: D
Q8. Refer to the exhibit.
In this BGP design, what is the next hop for 10.1.1.0/24 on R8 and R7?
A. The next hop for 10.1.1.0/24 on R7 is R8 and the next hop for R8 is R7.
B. The next hop for 10.1.1.0/24 on R7 is R5 and the next hop for R8 is R6.
C. The next hop for 10.1.1.0/24 on R7 is R6 and the next hop for R8 is R5.
D. The next hop for 10.1.1.0/24 on R7 is R3 and the next hop for R8 is R4.
Answer: A
Q9. In which two ways is a network design improved by the inclusion of IP Event Dampening? (Choose two.)
A. reduces processing load
B. provides sub-second convergence
C. improves network stability
D. prevents routing loops
E. quickly detects network failures
Answer: AC
Q10. You are tasked to design a QoS policy for a service provider so they can include it in the design of their MPLS core network. If the design must support an MPLS network with six classes, and CEs will be managed by the service provider, which QoS policy should be recommended?
A. map DSCP bits into the Exp field
B. map IP precedence bits into the DSCP field
C. map flow-label bits into the Exp field
D. map IP CoS bits into the IP Precedence field
E. map IP ToS bits into the Exp field
Answer: A
Q11. To meet specific business requirements, QoS-marked traffic must be sent over a dedicated link. Which technology fulfills this requirement?
A. MPLS
B. Q-in-Q tunneling
C. policy-based routing
D. EIGRP with modified metrics
Answer: C
Q12. Which two techniques are used in a network design to slow down the distribution of topology information caused by a rapidly flapping link? (Choose two.)
A. Bidirectional Forwarding Detection
B. IP event dampening
C. link-state incremental SPF
D. link-state partial SPF
E. LSA throttling
F. SPF throttling
Answer: BE
Q13. Refer to the exhibit.
Which single design aspect should be configured on the ABRs to reduce the impact of WAN upgrades for spoke routers on the core of the network?
A. route summarization
B. stub area
C. route filtering
D. not-so-stubby area
Answer: A
Q14. Which two aspects are considered when designing a dual hub, dual DMVPN cloud topology? (Choose two.)
A. recommended for high availability
B. requires all sites to have dual Internet connections C. spoke-to-spoke traffic will transit the hub unless spokes exchange dynamic routing directly
D. hub sites must connect to both DMVPN clouds
E. will only work with single-tier headend architecture
Answer: AE
Q15. Refer to the exhibit.
Four customer sites are connected through an EoMPLS-based VPLS over an MPLS provider. You are migrating from OSPF to multi-level IS-IS as the routing protocol to run on the four CE routers, and connectivity between all four sites is required. You want to control which CE or CEs will be elected as the Designated Intermediate System. Which two key aspects should be taken into account? (Choose two.)
A. The DIS role for Level1 and Level2 can be performed by different routers.
B. The CE with the second highest priority will be elected as the backup DIS on the LAN segment.
C. One of the CE routers will be elected as the DIS based on interface priority then highest MAC address.
D. It is recommended to use point-to-point link type on the CEs.
E. If a new CE router is added to the VPLS cloud with a lower interface priority it will become the DIS.
Answer: AC