Best Way To Study For Cisco 300-420 Exam Brilliant 300-420 Exam Questions PDF
Updated Verified Pass 300-420 Exam - Real Questions and Answers
Cisco 300-420 certification exam is an essential credential for IT professionals who want to advance their careers in network design and architecture. Designing Cisco Enterprise Networks certification exam is recognized globally and serves as proof of the candidate's expertise in designing Cisco enterprise networks. Candidates who pass the exam will have a competitive edge in the job market and will be able to take on more complex and challenging network design projects.
NEW QUESTION # 46
The implementations 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 scheme, DHCP services, NTP services, layer 2 connectivity, FHRP services, and device security, a trouble ticket has been opened indicating that Client 1 cannot ping the 209.65.200.241 address.
Use the supported commands to isolated the cause of this fault and answer the following questions.
The fault condition is related to which technology?
- A. NTP
- B. IPv4 layer 3 security
- C. BGP
- D. IPv4 OSPF Redistribution
- E. IP NAT
- F. IPv6 OSPF Routing
- G. IPv4 OSPF Routing
Answer: E
Explanation:
On R1 we need to add the client IP address for reachability to server to the access list that is used to specify which hosts get NATed.
NEW QUESTION # 47
How do endpoints inside an SD-Access network reach resources outside the fabric?
- A. Fabric borders use VRFs to map VNs to VRFs
- B. SD-Access transit links are used to transport encapsulated traffic from one fabric to another
- C. a VRF fusion router is used to map resources in one VN to another VN
- D. A fabric edge is used to de-encapsulate VXLAN traffic to normal IP traffic then transported over the outside network
Answer: C
NEW QUESTION # 48
Which AES mode should be used in a Cisco SD-WAN environment that includes multicast applications?
- A. Cipher Feedback (CFB)
- B. Galois/Counter Mode (GCM)
- C. Cipher Block Chaining (CBC)
- D. Electronic Code Book (ECB)
Answer: B
NEW QUESTION # 49
An engineer must propose a QoS architecture model that allows an application to inform the network of its traffic profile and to request a particular type of service to support its bandwidth and delay requirements.
The application requires consistent and dedicated bandwidth end to end. Which QoS architecture model meets these requirements?
- A. LLQ
- B. IntServ
- C. WRED
- D. DiffServ
Answer: B
NEW QUESTION # 50 
Refer to the exhibit. An architect must design a solution to connect the network behind R3 with the EIGRP network. Which mechanism should be included to avoid routing loops?
- A. split horizon
- B. route tags
- C. summarization
- D. down bit
Answer: B
Explanation:
Section: Advanced Addressing and Routing Solutions
NEW QUESTION # 51
Refer to the exhibit. A customer is planning to onboard three new VPN partner connections in the data center. The new subnets must not overlap with the existing data center network, and the subnet size must not be bigger than necessary. The customer dedicated 10.1.8.0/21 for this design. How must the subnets be divided to meet these requirements?
- A. Partner-A: 10.1.11.0/25
Partner-B: 10.1.12.0/22
Partner-C: 10.1.11.128/27 - B. Partner-A: 10.1.11.0/24
Partner-B: 10.1.13.0/23
Partner-C: 10.1.12.128/26 - C. Partner-A: 10.1.11.0/25
Partner-B: 10.1.13.0/23
Partner-C: 10.1.11.128/27 - D. Partner-A: 10.1.12.0/25
Partner-B: 10.1.13.0/22
Partner-C: 10.1.12.128/26
Answer: A
NEW QUESTION # 52
Which two functions does the control plane node provide in a Cisco SD-Access architecture? (Choose two.)
- A. LISP proxy ETR
- B. policy mapping
- C. host tracking database
- D. endpoint registration
- E. map server
Answer: C,E
NEW QUESTION # 53
A company has the following network infrastructure. (Refer to the exhibit.)
Router A is a GLBP active virtual gateway with priority level set to 250. Routers B and C are configured with the default GLPB configurations. The configuration of the active virtual gateway needs to be changed such that if the AVG fails, Router C should be elected to be used as an active virtual gateway. As the network administrator, you have been asked to make corresponding changes to the configuration.
Which command would you use for this purpose on Router C, and where would the command be configured?
- A. glbp 10 preempt (on Router C)
- B. glbp 10 priority 200 (on Router B)
- C. glbp 10 preempt (on Router B)
- D. glbp 10 priority 200 (on Router C)
Answer: D
Explanation:
You would configure the glbp 10 priority 200 command on Router C to change the configuration as required.
Gateway Load Balancing Protocol (GLBP) gateway priority determines the role that each GLBP gateway plays and what happens if the AVG fails. In the given scenario, Router A is used as an active virtual gateway. If the AVG in a LAN topology fails, an election process takes place to determine which backup virtual gateway should take over. When you configure this command on Router C, Router C will be elected when Router A fails as an AVG.
Once the configuration change is made, it can be verified by examining the output if the show run command as shown below:
In the above output, it can be determined that the glpb priority 200 command has been applied to the gigabitEthernet0/0 interface on Router
C. If the default priority of 100 had been applied, there would be no line in the output for priority. Because Router B is configured with the default configuration, it will have its priority set to the default level as 100.
You would not use the glbp 10 preempt command on Router B or the glbp 10 preempt command on Router C to change the configuration. You would use this command on a router to enable preemption. Preemption allows a virtual router that was once the AVG to assume its role as active virtual router when it comes back online if it has a higher priority than the current AVG. Alternatively, it can enable a new router with a higher priority to take the role of AVG from the current AVG if the new router has a higher AVG.
You would use not the glbp 10 priority 200 command on Router B to change the configuration. You would run this command if you needed Router B to be elected as the AVR instead of Router C, as running this command on Router B would configure it with higher priority than Router C.
Objective:
Infrastructure Services
Sub-Objective:
Configure and verify first-hop redundancy protocols
References:
Cisco > Home > End-of-Sale and End-of-Life Products > Cisco IOS Software Releases > 12.2T > Product Literature > White Papers > GLBP - Gateway Load Balancing Protocol Cisco > Cisco IOS IP Application Services Command Reference > glbp priority
NEW QUESTION # 54
When designing interdomain multicast, which two protocols are deployed to achieve communication between multicast sources and receivers? (Choose two.)
- A. BIDIR-PIM
- B. MSDP
- C. MLD
- D. MP-BGP
- E. IGMPv2
Answer: B,D
NEW QUESTION # 55
Drag and drop the descriptions from the left onto the corresponding VPN types on the rights.
Answer:
Explanation:
NEW QUESTION # 56
An engineer is designing a multicast network for a company specializing in VoD content. Receivers are across the Internet, and for performance reasons, the multicast framework close to the receivers within each AS. For high availability, if the sources in one AS are no longer available, the receivers of that AS must be able to receive the VoD content from sources in another AS. Which feature must the design include?
- A. MSDP
- B. Anycast RP
- C. SSM
- D. Bidirectional PIM
Answer: B
Explanation:
Explanation
https://learningnetwork.cisco.com/s/question/0D53i00000KsrGrCAJ/rendezvous-point-high-availability-mechan
NEW QUESTION # 57
Which two routing protocols allow for unequal cost load balancing? (Choose two.)
- A. BGP
- B. IS-IS
- C. RIPng
- D. EIGRP
- E. OSPF
Answer: A,D
NEW QUESTION # 58
An engineer must propose a QoS architecture model that allows an application to inform the network of its traffic profile and to request a particular type of service to support its bandwidth and delay requirements. The application requires consistent and dedicated bandwidth end to end. Which QoS architecture model meets these requirements?
- A. LLQ
- B. IntServ
- C. WRED
- D. DiffServ
Answer: B
NEW QUESTION # 59
Which feature is required for graceful restart to recover from a processor failure?
- A. Bidirectional Forwarding Detection
- B. Virtual Switch System
- C. Cisco Express Forwarding
- D. Stateful Switchover
Answer: C
NEW QUESTION # 60
An existing network solution is using BFD in echo mode. Several of the network devices are experiencing high CPU utilization which an engineer has determined is related to the BFD feature. Which solution should the engineer leverage to reduce the CPU load?
- A. Implement slow timers between peers with low CPU resources.
- B. Utilize carrier delay on all routers in the network.
- C. Enable BFD multi-hop on the devices with low CPU resources.
- D. Implement BED asynchronous mode between peers with low CPU resources.
Answer: A
Explanation:
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/sw/5_x/nx-
os/interfaces/configuration/guide/if_cli/if_bfd.html
Unde BFD echo function " BFD can use the slow timer to slow down the asycnhronous session when the echo function is enabled and reduce the number of BFD control packets that are sent between two BFD neighbors. "
NEW QUESTION # 61
Drag and drop the descriptions from the left onto the Cisco SD-WAN component they describe on the right.
Answer:
Explanation:
NEW QUESTION # 62
Refer to the exhibit. AS65533 and AS65530 are announcing a partial Internet routing table as well as their IP subnets. An architect must create a design that ensures AS64512 become a transit AS. Which filtering solution must the architect choose?
- A. No Export
- B. No-advertise
- C. Next-hop
- D. Maximum-prefix
Answer: D
NEW QUESTION # 63
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 scheme, 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.
What is the solution to the fault condition?
- A. In configuration mode, using the interface range port-channel 23, port-channel 24, then configure switchport trunk allowed vlan none followed by switchport trunk allowed vlan 10,20, commands.
- B. In configuration mode, using the interface range port-channel 13, port-channel 23, then configure switchport trunk allowed vlan 10,200 followed by interface Fastethernet 1/0/1, then no shutdown commands.
- C. In configuration mode, using the interface range port-channel 23, port-channel 24, then configure switchport trunk allowed vlan none followed by switchport trunk allowed vlan 10,20,200 commands.
- D. In configuration mode, using the interface range port-channel 13, port-channel 23, then configure switchport trunk allowed vlan none followed by switchport trunk allowed vlan 10,200 commands.
Answer: D
Explanation:
Solution
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 # 64
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 NSSA.
- B. Make area 1 a standard OSPF area.
- C. Make area 1 a stub.
- D. Make the area 1 routers part of area 0.
Answer: A
Explanation:
NEW QUESTION # 65
A network engineer must optimize a campus OSPF deployment Currently each time a type 1 or type 2 LSA is generated within an area, the OSPF process must recompute the entire SPT Which solution improves the recomputation process?
- A. SPF
- B. iSPF
- C. BFD
- D. PRC
Answer: C
NEW QUESTION # 66
Refer to the exhibit. A Cisco Catalyst switch is configured to allow only one MAC address to be learned manually on interface gig0/2. Which command must be run to dynamically learn the devices that are connected to the switch port?
- A. switchport port-security maximum 1 auto
- B. switchport port-security mac-address auto
- C. switchport port-security mac-address sticky
- D. switchport port-security aging
Answer: C
NEW QUESTION # 67
In a cisco SD-Access brownfield deployment scenario, which configuration deployment must be taken with Cisco DNA center?
- A. Automated UNDERLAY
- B. LAN automation
- C. Manual underlay
- D. Subnet stretching
Answer: C
Explanation:
In a brownfield deployment scenario, the deployment of the underlay network must be taken with manual configuration. The other configurations, such as subnet stretching, LAN automation, and automated underlay, can be done with the help of Cisco DNA Center.
NEW QUESTION # 68
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