[Aug 29, 2024] Fully Updated Free Actual Cisco 300-420 Exam Questions
Free 300-420 Questions for Cisco 300-420 Exam [Aug-2024]
Cisco 300-420 certification exam is a comprehensive test that covers a broad range of topics related to designing enterprise networks. 300-420 exam focuses on network design principles and concepts, including advanced addressing and routing solutions, advanced enterprise campus networks, WAN, security, and network services. 300-420 exam also tests the candidate's knowledge of network virtualization technologies, network automation, and network programmability.
NEW QUESTION # 121
When designing interdomain multicast, which two protocols are deployed to achieve communication between multicast sources and receivers? (Choose two.)
- A. IGMPv2
- B. MP-BGP
- C. MLD
- D. MSDP
- E. BIDIR-PIM
Answer: C,D
NEW QUESTION # 122
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 multiple native vendor YANG models to provide code consistency.
- D. Use a single native vendor YANG model to minimize development time
Answer: A
NEW QUESTION # 123
The customer solution requires QoS to support streaming multimedia over a WAN. An architect chooses to use Per-Hop Behavior.
Which solution should the engineer use to of mark traffic traveling between branch sites?
- A. CBWFQ with DSCP AF2
- B. LLQ with DSCP EF
- C. LLQ with DSCP AF4
- D. CBWFQ with DSCP AF3
Answer: D
Explanation:
LLQ with EF seems way too strict for STREAMING multimedia (where one can actually take advantage of buffering).
Judging by the various Cisco QoS baseline docs (even though the ones below are quite old), streaming video should be somewhere at AF3x/CS4.
https://www.cisco.com/en/US/technologies/tk543/tk759/technologies_white_paper0900aecd8029
5a9b.pdf
https://community.cisco.com/t5/collaboration-voice-and-video/cisco-qos-baseline-classification- and-marking-and-mapping/ta-p/3108355
NEW QUESTION # 124
An organization is designing a detailed QoS plan that limits bandwidth to specific rates. Which two parameters are supported be the traffic policing feature? (Choose two.)
- A. violating
- B. conforming
- C. marking
- D. bursting
- E. shaping
Answer: A,B
Explanation:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/qos_plcshp/configuration/xe-3s/qos-plcshp-xe-3s-book/qos-plcshp-class-plc.html
NEW QUESTION # 125
What is one function of the vSmart controller in an SD-WAN deployment?
- A. responsible for the centralized control plane of the SD-WAN network
- B. provides a data-plane at branch offices to pass traffic through the SD-WAN network
- C. provides centralized network management and a GUI to monitor and operate the SD-WAN overlay
- D. orchestrates vEdge and cEdge connectivity
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION # 126
Refer to the exhibit.
An engineer is designing a routing solution for a customer. The design must ensure that a failure of network
10.1.0.0/24, 10.1.2.0/24, 10.2.1.0/24, or 10.2.3.0/24 does not impact the core. It also requires fast convergence time during any link failover in the core or access networks. Which solution must the engineer select?
- A. Enable summarization on routers A and C.
- B. Enable FRR for the connected networks of routers A and C.
- C. Add aggregation layer between core and access networks.
- D. Enable graceful restart on routers A and C.
Answer: A
NEW QUESTION # 127
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 the configured Anycast RP address
- 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 separate unique loopback interfaces
Answer: D
NEW QUESTION # 128
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 multiple native vendor YANG models to provide code consistency.
- D. Use a single native vendor YANG model to minimize development time
Answer: A
NEW QUESTION # 129
Which control-plane technology allows the same subnet to exist across multiple network locations?
- A. ISE mobility services
- B. VXLAN
- C. FabricPath
- D. LISP
Answer: D
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html
NEW QUESTION # 130
Which NETCONF operation creates filtering that is specific to the session notifications?
- A. <notification>
- B. <logging>
- C. <create-subscription>
- D. <commit>
Answer: C
Explanation:
https://community.cisco.com/kxiwq67737/attachments/kxiwq67737/5672j-docs-dev- nso/87/1/rfc5277.pdf
NEW QUESTION # 131
A client is moving to Model-Driven Telemetry and requires periodic updates. What must the network architect consider with this design?
- A. Updates that contain changes within the data are sent only when changes occur.
- B. The primary push update is sent immediately and cannot be delayed.
- C. Periodic updates include a full copy of the data that is subscribed to.
- D. Empty data subscriptions do not generate empty update notifications.
Answer: C
Explanation:
Periodic updates contain a full copy of the subscribed data element or table for all supported transport protocols.
https://www.cisco.com/c/en/us/td/docs/ios-
xml/ios/prog/configuration/166/b_166_programmability_cg/model_driven_telemetry.html
NEW QUESTION # 132
Instructions
The main screen consists of two parts; the Main scenario and the Topology tabs. The main scenario describes TSHOOT.com test bed. The Topology tabs allow you to display the appropriate and select the trouble ticket.
To complete the item, you will first need to familiarize yourself with the TSHOOT.com test bed by clicking on the master scenario first and then the topologies tabs. Once you are familiar with the test bed and the topologies, you should start evaluating the trouble ticket. You will be presented with a Trouble Ticket scenario that will describe the fault condition. You will need to determine on which device the fault condition is located, to which technology the fault condition is related, and the solution to each trouble ticket. This will be done by answering three questions.
Ticket Selection
To begin, click on the Ticket on the Topology tabs.
Please note. Some of the questions will require you to use the scroll bar to see all options.
Fault Isolation
Read the ticket scenario to understand the fault condition.
Open the appropriate topology, based upon the ticket scenario.
Open the console of the desired device by clicking on that device in the topology, based upon your troubleshooting methodology.
Use the supported show, ping and trace commands to begin your fault isolation process.
Move to other devices as need by clicking on those devices within the topology.
Fault Identification
The trouble ticket will include three questions that you will need to answer:
1. Which device contains the fault
2. Which technology the fault condition is related to
3. What is the solution to the issue
To advance to the next question within the ticket click on "Next Question".
When you click "DONE", the trouble ticket will turn RED and will no longer be accessible.
You may also use the "Previous Question" button to review questions within that specific ticket.
To complete a trouble ticket, answer all three questions and click "DONE". This will store your response to the questions. Do not click on "DONE" unless you have answered all questions within the ticket.
Item Completion
Click the NEXT button on the bottom of the screen once a ticket is RED. This action moves you to the next item.
Scenario
The company has created the test bed network shown in the layer 2 and layer 3 topology exhibits.
This network consists of four routers, two layer 3 switches and two layer 2 switches.
In the IPv4 layer 3 topology, R1, R2, R3, and R4 are running OSPF with an OSPF process number 1.
DSW1, DSW2 and R4 are running EIGRP with an AS of 10. Redistribution is enabled where necessary.
R1 is running a BGP AS with a number of 65001. This AS has an eBGP connection to AS 65002 in the ISP's network. Because the company's address space is in the private range, R1 is also providing NAT translations between the inside (10.1.0.0/16 & 10.2.0.0/16) networks and the outside (209.65.200.0/24) network.
ASW1 and ASW2 are layer 2 switches.
NTP is enabled on all devices with 209.65.200.226 serving as the master clock source.
The client workstations receive their IP address and default gateway via R4's DHCP server. The default gateway address of 10.2.1.254 is the IP address of HSRP group 10 which is running on DSW1 and DSW2.
In the IPv6 layer 3 topology R1, R2, and R3 are running OSPFv3 with an OSPF process number 6. DSW1, DSW2 and R4 are running RIPng process name RIP_ZONE. The two IPv6 routing domains, OSPF 6 and RIPng are connected via GRE tunnel running over the underlying IPv4 OSPF domain. Redistribution is enabled where necessary.
Recently the implementation group has been using the test bed to do a 'proof-of-concept' on several implementations. This involved changing the configuration on one or more of the devices. You will be presented with a series of trouble tickets related to issues introduced during these configurations.
The implementation group has been using the test bed to do a 'proof-of-concept' that requires both Client 1 and Client 2 to access the WEB Server at 209.65.200.241. After several changes to the network addressing, routing schemes, DHCP services, NTP services, and FHRP services, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address.
Use the supported commands to isolate the cause of this fault and answer the following questions.
On which device is the fault condition located?
- A. DSW1
- B. R3
- C. ASW1
- D. R1
- E. DSW2
- F. R2
- G. R4
- H. ASW2
Answer: C
Explanation:
Steps need to follow as below:-1.When we check on client 1 & Client 2 desktop we are not receiving DHCP address from R4Ipconfig ----- Client will be getting 169.X.X.X2.On ASW1 port Fa1/0/ 1 & Fa1/0/2 access port VLAN 10 was assigned which is using IPaddress 10.2.1.0/24Sh run ------- & check for running config of int fa1/0/1 & fa1/0/2====================================================interface FastEthernet1/0/1switchport mode accessswitchport access vlan 10interface FastEthernet1/0/2switchport mode accessswitchport access vlan 10
3.We need to check on ASW 1 trunk port the trunk Po13 & Po23 were receiving VLAN 20 &200 but not VLAN
10 so that switch could not get DHCP IP address and was failing to reach IPaddress of Internet4.
Change required:
On ASW1 below change is required for switch-to-switch connectivity..int range portchannel13,portchannel23switchport trunk allowed vlan noneswitchport trunk allowed vlan 10,200
NEW QUESTION # 133
Refer to the exhibit.
Refer to the exhibit. An engineer is designing an OSPF network for a client. Requirements dictate that the routers in Area 1 should receive all routes belonging to the network, including EIGRP, except the ones originated in the RIP domain. Which action should the engineer take?
- A. Make area 1 a standard OSPF area.
- B. Make the area 1 routers part of area 0.
- C. Make area 1 a NSSA.
- D. Make area 1 a stub.
Answer: C
Explanation:
NEW QUESTION # 134
Refer to the exhibit. MTU has been configured as shown, and no MTU command has been configured on the tunnel interfaces. It has been found that fragmentation is occurring when tunneled packets are placed onto the IPv6 underlay network. Which configuration change will resolve this problem?
- A. Increase the MTU on the IPv4 networks
- B. Set the MTU to 1476 on the tunnel interfaces
- C. Set the MTU to 1500 on the tunnel interfaces
- D. Increase the MTU on the IPv6 network
Answer: B
NEW QUESTION # 135
A network solution is being designed for a company that connects to multiple Internet service providers.
Which
Cisco proprietary BGP path attribute will influence outbound traffic flow?
- A. Local Preference
- B. Weight
- C. Community
- D. AS Path
- E. MED
Answer: B
NEW QUESTION # 136
An engineer must design an addressing plan for a small business using a single /24 network. Each department must have its own subnet. Drag and drop the subnets from the left onto the departments requirements that they fulfill on the right. Not all options are used.
Answer:
Explanation:
NEW QUESTION # 137
Which two statements about VRRP advertisements are true? (Choose two.)
- A. They are sent every three seconds by default.
- B. They are sent only from the master router.
- C. They include VRRP timer information.
- D. They include priority information.
- E. They are sent from the master router and standby routers.
Answer: B,D
Explanation:
The virtual router master sends VRRP advertisements to other VRRP routers in the same group.
The advertisements communicate the priority and state of the virtual router master. The VRRP advertisements are encapsulated in IP packets and sent to the IP Version 4 multicast address assigned to the VRRP group. The advertisements are sent every second by default.
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipapp_fhrp/configuration/xe-3s/fhp-xe-3s- book/fhp-vrrp.html#GUID-F08F171E-D151-448B-B58C-D2ED17E11E9F
NEW QUESTION # 138
A company is planning to open two new branches and allocate the 2a01:c30:16:7009::3800/118 IPv6 network for the region. Each branch should have the capacity to accommodate maximum of
200 hosts. Which two networks should the company use? (Choose two.)
- A. 2a01:0c30:0016:7009::3a80/121
- B. 2a01:0c30:0016:7009::3a00/120
- C. 2a01:0c30:0016:7009::3c00/120
- D. 2a01:0c30:0016:7009::3b00/121
- E. 2a01:0c30:0016:7009::3b00/120
Answer: B,E
Explanation:
Network range for 2a01:c30:16:7009::3800/118
2a01:0c30:0016:7009:0000:0000:0000:3800-
2a01:0c30:0016:7009:0000:0000:0000:3bff
Network Range for 2a01:0c30:0016:7009::3a00/120
2a01:0c30:0016:7009:0000:0000:0000:3a00-
2a01:0c30:0016:7009:0000:0000:0000:3aff
Network range for 2a01:0c30:0016:7009::3b00/120
2a01:0c30:0016:7009:0000:0000:0000:3b00-
2a01:0c30:0016:7009:0000:0000:0000:3bff
NEW QUESTION # 139
Which design consideration should be observed when EIGRP is configured on Data Center switches?
- A. Configure multiple EIGRP autonomous systems to segment Data Center services and applications.
- B. Lower EIGRP hello and hold timers to their minimum settings to ensure rapid route reconvergence.
- C. Perform manual summarization on all Layer 3 interfaces to minimize the size of the routing table.
- D. Prevent unnecessary EIGRP neighborships from forming across switch virtual interfaces.
Answer: D
Explanation:
While summarization can be beneficial for reducing the size of the routing table, it's not always necessary to perform manual summarization on all interfaces. Summarization should be done strategically based on the network topology and addressing plan. Preventing unnecessary EIGRP neighborships on switch virtual interfaces is a key design consideration for a more efficient and scalable configuration in a Data Center environment because In a Data Center environment, switch virtual interfaces (SVIs) are often used for VLAN routing. Forming EIGRP neighborships across all SVIs may lead to unnecessary overhead and increased complexity in the network.
NEW QUESTION # 140
......
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