Free Cisco 300-420 Exam Questions and Answer from Training Expert Pass4sures
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NEW QUESTION # 62 
Refer to the exhibit. An architect is developing a solution to consolidate networks while retaining device redundancy. The routing protocol for the WAN routers must be open standard, ensure high availability, and provide the fastest convergence time. Which solution must the design include?
- A. both routers running EIGRP
- B. one router running ISIS and other OSPF v3
- C. one router running OSPFv2 and other OSPF v3
- D. both routers running OSPFv2
Answer: A
Explanation:
EIGRP has a function called "EIGRP Ipv6" (But that can still be called "EIGRP")
NEW QUESTION # 63
Drag and drop the model driven telemetry characteristics from the left onto the mode they belong to on the right.
Answer:
Explanation:
NEW QUESTION # 64
Refer to the exhibit. An engineer must design an automatic failover solution. The solution should allow HSRP to detect a WAN 1 failure and initiate an automatic failover, making router R2 the active HSRP router. Which two solutions should the engineer choose? (Choose two.)
- A. use IP source routing
- B. use a floating static route
- C. Implement Enhanced Object Tracking on roster R1
- D. Implement PBR on router R1
- E. Implement IP SLA on router R1
Answer: C,E
NEW QUESTION # 65 
Refer to the exhibit. An engineer is planning an IPv4 to IPv6 migration solution for a customer. The routers in the network can support IPv4 and IPv6, except for the DWDM routers. The DWDM routers provide a Layer 2 link in which the routers peer directly with each other across a DWDM circuit. The circuit also provides connectivity between the mail servers. Which IPv6 migration technique must the engineer deploy?
- A. dual-stack
- B. 6rd
- C. 6to4
- D. ISATAP
Answer: B
NEW QUESTION # 66
Which consideration must be made when designing a Cisco SD-Access fabric underlay?
- A. Subnets must be reduced to decrease latency.
- B. Up to six control planes are supported.
- C. The default MTU should be increased.
- D. A unified policy must be used.
Answer: C
Explanation:
Look under "Underlay Network Design". Its the second bullet point. https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html#Underlay_Network_Design
NEW QUESTION # 67 
Refer to the exhibit. A network engineer with an employee ID: 4384:99:754 must design a BGP solution based on these conditions:
* Traffic sessions occur between the branches and the data center.
* Branch B has limited resources to process routing updates.
* HQ must filter out all prefixes from branch A to R4.
Which outbound route filtering (ORF) solution must the engineer choose?
- A. Use a prefix list with the 10.10.10.0/24 subnet for ORF on R2
- B. Use a prefix list with the 10.10.10.0/24 subnet for ORF on R5.
- C. Use a prefix list with the 192.168.10.0/24 subnet for ORF on R2.
- D. Use a prefix list with the 192.168.10.0/24 subnet for ORF on R4.
Answer: A
NEW QUESTION # 68
An architect is designing a network that will utilize the spanning tree protocol to ensure a loop-free topology. The network will support an engineering environment where it is necessary for end users to connect their own network switches for testing purposes. Which feature should the architect include in the design to ensure the spanning tree topology is not affected by these rogue switches?
- A. BPDU Skew Detection
- B. loop guard
- C. root guard
- D. BPDU guard
Answer: C
NEW QUESTION # 69 
Refer to the exhibit. Which process does the Ethernet LMI protocol follow that is defined by the MEF 16 Technical Specification?
- A. broadcasts multicast network routes from the CE to the PE
- B. communicates ENI and EVC attributes to the CE
- C. broadcasts to all subnets from the CE when an EVC is added
- D. notifies the CE of the availability state of a configured EVC
Answer: D
NEW QUESTION # 70
Which protocol is deployed through LAN automation to build node-to-node underlay adjacencies in SDA?
- A. VXLAN
- B. IS-IS
- C. OLISP
- D. OSPF
Answer: B
NEW QUESTION # 71
What is the purpose of a control plane node in a Cisco SD-Access network fabric?
- A. to detect endpoints in the fabric and inform the host tracking database of EID-to-fabric-edge node bindings
- B. to maintain the endpoint database and mapping between endpoints and edge nodes
- C. to act as the network gateway between the network fabric and outside networks
- D. to identify and authenticate endpoints within the network fabric
Answer: B
Explanation:
Endpoint registration-Each edge node has a LISP control-plane session to all control plane nodes. After an endpoint is detected by the edge node, it is added to a local database called the EID-table. Once the host is added to this local database, the edge node also issues a LISP map- register message to inform the control plane node of the endpoint so the central HTDB is updated.
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html
NEW QUESTION # 72
Which consideration must be made when designing a Cisco SD-Access fabric underlay?
- A. Subnets must be reduced to decrease latency.
- B. Up to six control planes are supported.
- C. The default MTU should be increased.
- D. A unified policy must be used.
Answer: C
Explanation:
VXLAN adds 50 bytes to the original packet. The common denominator and recommended MTU value available on devices operating in a fabric role is 9100. Network should have a minimum starting MTU of at least 1550 bytes to support the fabric overlay. MTU values between 1550 and
9100 are supported along with MTU values larger than 9100 though there may be additional configuration and limitations based on the original packet size.
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html
NEW QUESTION # 73
Which two BGP features will result in successful route exchanges between eBGP neighbors sharing the same AS number? (Choose two.)
- A. bestpath as-path ignore
- B. advertise-best-external
- C. allow-as-in
- D. client-to-client reflection
- E. as-override
Answer: C,E
Explanation:
Section: Advanced Addressing and Routing Solutions
NEW QUESTION # 74
Exhibit:
- A. Make R11 an L2 router.
- B. Make R31 an L1 router.
- C. Make Area 0 L2-only.
- D. Make R3 an L1L2 router.
Answer: D
Explanation:
ENSLD 300-420 cert guide page 117. When creating a backbone there should never be L1 routers between (L2 only, or) L1/L2 routers.
NEW QUESTION # 75
Drag and drop the characteristics from the left onto the YANG modules they describe on the right. Not all options are used.
Answer:
Explanation:
NEW QUESTION # 76
Refer to the exhibit.
Refer to the exhibit. Where must an architect plan for route summarization for the topology?
- A. from the aggregation toward the access and the access toward the aggregation
- B. from the core toward the aggregation and the access toward the aggregation
- C. from the core toward the aggregation and the aggregation toward the core
- D. from the aggregation toward the core and the aggregation toward the access
Answer: D
NEW QUESTION # 77
Refer to the exhibit. An architect is designing a routing solution for a company. The new design will add a circuit routers C and D to protect against loss of connectivity to 10.0.4.0/24 during a link failure between routers B and D. Which solution must the architect choose?
- A. Stub connected
- B. Stub receive-only
- C. Stub redistributed
- D. Stub leak-map
Answer: D
Explanation:
https://networklessons.com/cisco/ccie-routing-switching-written/eigrp-stub-leak-map
NEW QUESTION # 78
What is the purpose of service routes in OMP updates?
- A. define the remote management information
- B. describe underlay transport information
- C. indicate services that are enabled for service insertion
- D. specify routes toward a centralized orchestration plane
Answer: C
NEW QUESTION # 79
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. R2
- B. R3
- C. DSW2
- D. R1
- E. ASW2
- F. ASW1
- G. R4
- H. DSW1
Answer: F
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 # 80
Drag and drop the characteristics from the left onto the telemetry mode they apply to on the right.
Answer:
Explanation:
NEW QUESTION # 81
Which two overlay network design considerations must be made for a Cisco SD-Access network? (Choose two.)
- A. Dedicated IGP process for the fabric
- B. Reduce subnets and simplify DHCP management
- C. Layer 3 to the access design
- D. LAN automation for deployment
- E. Avoid overlapping IP subnets
Answer: B,E
Explanation:
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.
html#Overlay_Network_Design
NEW QUESTION # 82 
Refer to the exhibit. An architect is developing a solution to consolidate networks while retaining device redundancy. The routing protocol for the WAN routers must be open standard, ensure high availability, and provide the fastest convergence time. Which solution must the design include?
- A. both routers running EIGRP
- B. one router running ISIS and other OSPF v3
- C. one router running OSPFv2 and other OSPF v3
- D. both routers running OSPFv2
Answer: A
Explanation:
Explanation
EIGRP has a function called "EIGRP Ipv6" (But that can still be called "EIGRP")
NEW QUESTION # 83
A customer's current Layer 2 infrastructure is running Spanning Tree 802.1d, and all configuration changes are manually implemented on each switch. An architect must redesign the Layer 2 domain to achieve these goals:
- A. reduce the time spent on network administration
- B. reduce manual configuration errors
- C. reduce the impact of topology changes
Answer: B,C
Explanation:
Which two solutions should the architect include in the new design? (Choose two.) Implement Rapid PVST+ instead of STP.
Implement MST instead of STP.
Use VTP to propagate VLAN information and to prune unused VLANs.
Configure broadcast and multicast storm control on all switches.
Configure dynamic trunking protocol to propagate VLAN information.
NEW QUESTION # 84
A customer's current Layer 2 infrastructure is running Spanning Tree 802.1d, and all configuration changes are manually implemented on each switch. An architect must redesign the Layer 2 domain to achieve these goals:
* reduce the impact of topology changes
* reduce the time spent on network administration
* reduce manual configuration errors
Which two solutions should the architect include in the new design? (Choose two.)
- A. Implement Rapid PVST+ instead of STP.
- B. Use VTP to propagate VLAN information and to prune unused VLANs.
- C. Configure broadcast and multicast storm control on all switches.
- D. Implement MST instead of STP.
- E. Configure dynamic trunking protocol to propagate VLAN information.
Answer: B,C
Explanation:
Section: Advanced Enterprise Campus Networks
NEW QUESTION # 85
Refer to the exhibit.
An engineer must design a WAN solution so that ISP-1 is always preferred over ISP-2. The path via ISP-2 is considered as a backup and must be used only when the path to ISP-1 is down. Which solution must the engineer choose?
- A. R1:
- Routes advertised to ISP-1: 0x AS-path prepend
- Routes received from ISP-1: LOW local-preference
- Routes advertised to R2: community NO-ADVERTISE
- Routes received from R2: no action
R2:
- Routes advertised to ISP-2: 5x AS-path prepend
- Routes received from ISP-2: HIGH local-preference
- Routes advertised to R1: no action
- Routes received from R1: community NO-ADVERTISE - B. R1:
- Routes advertised to ISP-1: 0x AS-path prepend
- Routes received from ISP-1: HIGH local-preference
- Routes advertised to R2: no action
- Routes received from R2: community NO-EXPORT
R2:
- Routes advertised to ISP-2:5x AS-path prepend
- Routes received from ISP-2: LOW local-preference
- Routes advertised to R1: community NO-ADVERTISE
- Routes received from R1: no action - C. R1:
- Routes advertised to ISP-1: 0x AS-path prepend
- Routes received from ISP-1: HIGH local-preference
- Routes advertised to R2: community NO-EXPORT
- Routes received from R2: no action
R2:
- Routes advertised to ISP-2: 5x AS-path prepend
- Routes received from ISP-2: LOW local-preference
- Routes advertised to R1: no action
- Routes received from R1: no action - D. R1:
- Routes advertised to ISP-1: 5x AS-path prepend
- Routes received from ISP-1: LOW local-preference
- Routes advertised to R2: community NO-ADVERTISE
- Routes received from R2: no action
R2:
- Routes advertised to ISP-2: 0x AS-path prepend
- Routes received from ISP-2: HIGH local-preference
- Routes advertised to R1: community NO-EXPORT
- Routes received from R1: no action
Answer: C
NEW QUESTION # 86
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