Designing Cisco Enterprise Networks (300-420) Free Practice Test

Question 1

A company must automate a set of complex changes aligned with DR testing in the network.
These changes are specific, and the DR playbook will be adjusted in the future. The playbook has diverse routing and switching assets in scope as well as multiple vendor and hardware platforms.
A developer will create a thin, web front-end microservice and integrate with an Open daylight controller to push changes to the network. Which YANG model should be used?

A. Use an open YANG model to allow the reuse of code and standardize the implementation across platforms

B. Develop an individualized YANG model to minimize development resources and time to market.

C. Use a single native vendor YANG model to minimize development time

D. Use multiple native vendor YANG models to provide code consistency.

Correct Answer: A

Question 2

An engineer is designing a PIM Anycast RP solution between two data centers. The design must ensure that RP1 in DC1 and RP2 in DC2 inform each other about specific sources that have joined locally. Which solution must the engineer choose?

A. Enable MSDP between RPs using separate unique loopback interfaces

B. No action is required because PIM registers from the source will, by default, reach each RP

C. Provision the RPs on the same IP subnet and extend the subnet at Layer 2 between data centers

D. Enable MSDP between RPs using the configured Anycast RP address

Correct Answer: A

Question 3

Which security functionality does gRPC provide?

A. enabling RC6 data-level encryption with CRC check

B. implementing secure server-client tunnels with RSA 2048 cipher encryption

C. mandatory encryption of data at rest using the AES and RSA protocols

D. supporting secure communication between network devices and control systems using TLS and HTTPS

Correct Answer: D

Question 4

Refer to the exhibit. Area 10 is a regular OSPF area and networks 10.1.1.0/24 and 172.16.1.0/24 are internal. Which design provides optimal routing between both networks when the link between routers C and E fails?

A. Move the link between routers C and D to area 10.

B. Make area 10 a not-so-stubby area.

C. Create a tunnel between routers E and F in area 10.

D. Create an OSPF virtual link between routers E and F.

Correct Answer: A

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Question 5

An organization plans to deploy multicast across two different autonomous systems. Their solution must allow RPs to:
- discover active sources outside their domain
- use the underlying routing information for connectivity with other
RPs
- announce sources joining the group
Which solution supports these requirements?

A. SSM

B. PIM-SM

C. PIM-DM

D. MSDP

Correct Answer: D

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Question 6

What is a benefit of using VRRPv3 as compared to VRRPv2?

A. VRRPv3 supports preemption

B. VRRPv3 supports stateful switchover

C. VRRPv3 supports authentication

D. VRRPv3 supports IPv4 and IPv6

Correct Answer: D

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Question 7

Which two activities should occur during an SE's discovery process? (Choose two.)

A. Working with the customer to develop a reference architecture

B. Mapping Cisco innovation to customer s needs

C. Referencing the PPDIOO model to effectively facilitate the discussion

D. Establishing credibility with the customer

E. Gathering information about the current state of the customer s network environment

Correct Answer: B,E

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Question 8

A customer has several remote sites connected with their headquarters through microwave links.
An engineer must propose a backup WAN solution based on these conditions:
- A physical WAN solution is not available for most of the sites.
- The customer has a limited budget and a short time frame for
implementation.
- The backup link will have low bandwidth requirements.
- Users will tolerate a WAN outage of up to 2 hours.
Which backup WAN link type should the engineer recommend?

A. laser link

B. LTE

C. 802.15.1 Bluetooth

D. 802.16 WiMAX

Correct Answer: B

Question 9

Refer to the exhibit. An architect must design an IP addressing scheme for a multisite network connected via a WAN transit. The campus site must accommodate 12,000 devices and the branch sites must accommodate 1,000 devices. Which address scheme optimizes network device resources, contains convergence events to the different blocks of the network, and ensures future growth of the network?

A. Campus: 10.0.0.0/20
Branch1: 10.0.64.0/21
Branch2: 10.0.128.0/21

B. Campus: 10.0.0.0/10
Branch1: 10.64.0.0/10
Branch2: 10.128.0.0/10

C. Campus: 10.0.0.0/16
Branch1: 10.255.0.0/20
Branch2: 10.255.16.0/20

D. Campus: 10.0.0.0/18
Branch1: 10.0.192.0/21
Branch2: 10.0.200.0/21

Correct Answer: D

Question 10

Which of the following are valid methods of VRRP authentication? (Choose three.)

A. No authentication

B. SHA-124

C. SHA-254

D. MD5

E. Plain text authentication

F. WAP

Correct Answer: A,D,E

Question 11

Refer to the exhibit. An engineer working for a telecommunication company with an employee ID:
1234:56:789 is calculating STP scalability for switches to ensure that the numbers are below the maximum supported value for STP logical ports. How many logical interfaces are active for switch A?

A. 4

B. 100

C. 202

D. 307

Correct Answer: C

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Question 12

Refer to the exhibit. A customer requires maximum uptime for the data plane between R1 and R3 running OSPF. Which solution must the design include for high availability if the routing process on R2 requires maintenance?

A. nonstop forwarding on R3 only

B. graceful restart on all routers

C. nonstop forwarding on R1 and R3

D. BFD on all routers

Correct Answer: B

Question 13

When IPsec VPNs are designed, what is a unique requirement if support for IP Multicast is required?

A. IPsec forwarding using transport mode

B. encapsulation of traffic with GRE or VTI

C. IPsec forwarding using tunnel mode

D. additional bandwidth for headend

Correct Answer: B

Question 14

Which feature provides the capability for intra-VN traffic filtering and control within the Cisco SD- Access architecture?

A. service policy

B. scalable groups

C. MAC ACL

D. prefix list

Correct Answer: B

Question 15

Which OSPF area blocks LSA Type 3, 4 and 5, but allows a default summary route?

A. stub

B. normal

C. NSSA

D. totally stubby

Correct Answer: D

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Cisco Designing Cisco Enterprise Networks (300-420) Free Practice Test