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300-420
Designing Cisco Enterprise Networks (ENSLD) v1.1 Questions and Answers

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Viewing questions 51-60 out of questions

Questions # 51:

What are two benefits of designing an SD-WAN network fabric with direct Internet access implemented at

every site? (Choose two.)

Options:

It decreases latency to applications hosted by public cloud service provider.

It decreases latency on Internet circuits.

It increases the speed of delivery of site deployments through zero-touch provisioning.

It increases the total available bandwidth on Internet circuits.

It alleviates network traffic on MPLS circuits.

Answer

A, E

Questions # 52:

Which PIM mode uses a shared tree only?

Options:

bidirectional

sparse

dense

source-specific

Answer

Explanation

The PIM mode that uses a shared tree only is the sparse mode. In sparse mode, PIM routers build a shared tree for multicast traffic, which is shared among all of the routers in the multicast domain. The shared tree is built from the source routers to the rendezvous point (RP) and then from the RP to the receivers. The advantage of sparse mode is that it requires less state information on the routers.

Questions # 53:

What is a challenge of the SaaS model?

Options:

higher initial costs

lack of application and infrastructure control

requires upgrades to individual computers to meet performance requirements

higher application and data integration complexity

Answer

Questions # 54:

Which function do reverse path forwarding mechanisms perform in a multicast deployment?

Options:

They notify the upstream router of multicast traffic.

They send PIM prune message toward multicast sources.

They eliminate overlapping multicast addresses

They prevent loops and duplicate packets.

Answer

Explanation

Reverse path forwarding (RPF) mechanisms are used to prevent loops and duplicate packets in multicast deployments [1]. The RPF check verifies that all multicast traffic received on a router is sourced from the expected direction, ensuring that multicast traffic is not looped back in the network. The RPF check works by comparing the source IP address of a multicast packet with the routing table, and only forwarding it if it matches the expected entry.

Questions # 55:

Drag and drop the model driven telemetry characteristics from the left onto the mode they belong to on the right.

Question # 55

Options:

Answer

Answer:

Explanation

Graphical user interface, diagram Description automatically generated with medium confidence

Questions # 56:

Question # 56

Refer to the exhibit An engineer is designing an OSPF solution with these requirements:

NMS server will manage R5 and R6.

Upon failure of R1. all NMS traffic should be routed through R4.

Upon failure of the link between R5 and R6. all traffic destined for 10.6.6.6 should be routed through R4

Which solution must the engineer choose?

Options:

Advertise 172.16.1.1 into OSPF process 1 with high cost on R1.

Apply static routes on R2 and R3 with IP SLA tracking toward R5 and R6.

Enable the default-Information originate command with a higher metric on R2 to R1.

Redistribute OSPF process 1 into process 2 on R1 and R4.

Answer

Questions # 57:

An engineer must design a routing solution for a company that is single-homed to an ISP. The company's goal is to run BGP between the CE and the PE devices. To support running BGP, the company obtained a public AS number and IP subnet from ARIN. Which solution must the engineer select?

Options:

• The customer announces the public IP subnet to the ISP

• The ISP announces the default route to the customer.

• The customer announces the public IP subnet to the ISP

• The ISP announces the BGP table to the customer

• The ISP announces the customer public IP subnet.

• The ISP announces the partial BGP table to the customer.

• The customer announces the default route to the ISP

• The ISP announces the default route to the customer

Answer

Questions # 58:

Question # 58

Refer to the exhibit. The distribution switches serve as the layer 3 boundary. HSRP preemption is enabled. When the primary switch comes back after a failure, traffic is initially dropped. Which solution must be implemented to improve the design?

Options:

Increase the hello timers on both HSRP devices

Use the preempt delay feature on the primary HSRP device.

Use the preempt delay feature on the backup HSRP device

Configure a higher mac-refresh interval on both HSRP devices

Answer

Questions # 59:

An engineer must design a VPN solution for a company that has multiple branches connecting to a main office. What are two advantages of using DMVPN instead of IPsec tunnels to accomplish this task? (Choose

two.)

Options:

support for AES 256-bit encryption

greater scalability

support for anycast gateway

lower traffic overhead

dynamic spoke-to-spoke tunnels

Answer

B, E

Questions # 60:

Refer to the exhibit. A network engineer is designing an OSPF solution to connect a company's remote to a newly provisioned MPLS VPN backbone. Some of the branches have a direct dark fiber connection between each other. The engineer wants to ensure that the dark fibers are used only when the MPLS core is unavailable. Which solution must the engineer choose?