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Cisco 300-420 exam, also known as Designing Cisco Enterprise Networks (ENSLD), is a certification exam that tests the knowledge and skills of network engineers in designing enterprise-level networks using Cisco technologies. 300-420 exam is part of the Cisco Certified Network Professional (CCNP) certification track and is intended for professionals who have at least three to five years of experience in designing and implementing enterprise networks.
Cisco 300-420 exam, also known as the Designing Cisco Enterprise Networks (ENSLD) exam, is an important certification that validates the skills and knowledge of network professionals in designing and implementing complex enterprise network solutions. 300-420 exam is designed to test the candidates' understanding of various network design principles, architectures, and technologies, including advanced routing and switching protocols, security, wireless, and virtualization.
NEW QUESTION # 104
Drag and drop the characteristics from the left onto the Yang model they describe on the right.
Select and Place:
Answer:
Explanation:
NEW QUESTION # 105
Drag and drop the description from the left onto the corresponding WAN connectivity types and categories on the right.
Answer:
Explanation:
NEW QUESTION # 106
A customer reports that each time a networking component fails, OSPF recalculates the backup path, with causes a short outage. Which solution must the customer implement to improve this situation?
- A. Incremental SPF
- B. BFD
- C. Aggressive OSPF timers
- D. LFA FRR
Answer: A
Explanation:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/15-sy/iro-15-sy-book/iro-incre-spf.pdf
NEW QUESTION # 107
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 # 108
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: B
NEW QUESTION # 109
Refer to the exhibit.
Refer to the exhibit. An architect must create a stable and scalable EIGRP solution for a customer. The design must:
* conserve bandwidth, memory, and CPU processing
* prevent suboptimal routing
* avoid any unnecessary queries
Which two solutions must the architect select? (Choose two.)
- A. stub routing
- B. distribute lists
- C. prefix lists
- D. route summarization
- E. static redistribution
Answer: B,D
NEW QUESTION # 110
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. IntServ
- B. WRED
- C. LLQ
- D. DiffServ
Answer: A
NEW QUESTION # 111 
Refer to the exhibit. An architect reviews the low-level design of a company's enterprise network and advises optimizing the STP convergence time. Which functionality must be to Gi1/0/1-10 to follow the architect's recommendation?
- A. BPDU guard
- B. root guard
- C. PortFast
- D. UplinkFast
Answer: C
NEW QUESTION # 112
Drag and drop the characteristics from the left onto the correct telemetry mode on the right.
Answer:
Explanation:
Explanation
In a dial-in mode, the destination initiates a session to the router and subscribes to data to be streamed. Dialin mode is supported over gRPC in only 64-bit platforms In a dial-out mode, the router initiates a session to the destinations based on the subscription. All 64-bit IOS XR platforms (except for NCS 6000 series routers) support gRPC and TCP protocols. All 32-bit IOS XR platforms support only TCP.
NEW QUESTION # 113
Which feature is required for graceful restart to recover from a processor failure?
- A. Stateful Switchover
- B. Cisco Express Forwarding
- C. Virtual Switch System
- D. Bidirectional Forwarding Detection
Answer: A
Explanation:
Explanation
https://archive.nanog.org/meetings/nanog42/presentations/Weissner_SSO.pdf The Stateful Switchover (SSO) feature works with Nonstop Forwarding (NSF) in Cisco software to minimize the amount of time a network is unavailable to its users following a switchover. The primary objective of SSO is to improve the availability of networks constructed with Cisco routers.
NEW QUESTION # 114
Drag and drop the description from the left onto the corresponding WAN connectivity types and categories on the right.
Answer:
Explanation:
NEW QUESTION # 115
Which method does Cisco SD-WAN use to avoid fragmentation issues?
- A. PMTUD is used.
- B. Access circuits are configured with 1600 byte MTU settings.
- C. Jumbo frames are enabled.
- D. Traffic is marked with the DF bit set.
Answer: A
Explanation:
Explanation
https://www.cisco.com/c/dam/en/us/solutions/collateral/enterprise-networks/sd-wan/nb-06-cisco-sd-wan-ebook-c
NEW QUESTION # 116
A client is moving to Model-Driven Telemetry and requires periodic updates. What must the network architect consider with this design?
- A. The primary push update is sent immediately and cannot be delayed.
- B. Periodic updates include a full copy of the data that is subscribed to.
- C. Empty data subscriptions do not generate empty update notifications.
- D. Updates that contain changes within the data are sent only when changes occur.
Answer: D
NEW QUESTION # 117
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.
The fault condition is related to which technology?
- A. Loop Prevention
- B. Port Security
- C. Access Vlans
- D. Switch-to-Switch Connectivity
- E. NTP
- F. Switch Virtual Interface
- G. VLAN ACL / Port ACL
Answer: D
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 # 118
An engineer must design an in-band management solution for a customer with branch sites. The solution must allow remote management of the branch sites using management protocols over an MPLS WAN. Queueing is implemented at the remote sites using these classes:
How must the solution prioritize the management traffic over the WAN?
- A. Mark the traffic with DSCP EF and map into Class1 with a minimum bandwidth assigned by reducing the bandwidth available to Class2.
- B. Mark the traffic with DSCP CS6 and map into Class1 with a minimum bandwidth assigned by reducing the bandwidth available to Class2
- C. Mark the traffic with DSCP CS2 and map into Class2 with a minimum bandwidth assigned by reducing the bandwidth available to Class3
- D. Mark the traffic with DSCP CS1 and map into Class2 with a minimum bandwidth assigned by reducing the bandwidth available to CIass3.
Answer: A
NEW QUESTION # 119
Refer to the exhibit.
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. Implement Enhanced Object Tracking on router R1
- B. Implement PBR on router R1
- C. use a floating static route
- D. use IP source routing
- E. Implement IP SLA on router R1
Answer: A,E
NEW QUESTION # 120
Drag and drop the characteristics from the left onto the correct telemetry mode on the right.
Answer:
Explanation:
In a dial-in mode, the destination initiates a session to the router and subscribes to data to be streamed. Dialin mode is supported over gRPC in only 64-bit platforms In a dial-out mode, the router initiates a session to the destinations based on the subscription. All 64-bit IOS XR platforms (except for NCS 6000 series routers) support gRPC and TCP protocols. All 32-bit IOS XR platforms support only TCP.
Reference:
https://www.cisco.com/c/en/us/td/docs/iosxr/asr9000/telemetry/b-telemetry-cg-asr9000-61x/b-telemetry-cgasr9000-
61x_chapter_010.html#id_36445
NEW QUESTION # 121
A company's security policy requires that all connections between sites be encrypted in a manner that does not require maintenance of permanent tunnels. The sites are connected through a private MPLS-based service that uses a dynamically changing key and spoke-to-spoke communication. Which type of transport encryption must be used in this environment?
- A. standard IPsec VPN
- B. DMVPN
- C. GETVPN
- D. GRE VPN
Answer: C
NEW QUESTION # 122
How are wireless endpoints registered in the HTDB in a Cisco SD-Access architecture?
- A. Fabric APs update the HTDB with the clients' ElD and RLOC
- B. Fabric edge nodes update the HTDB based on CAPPWAP messaging from the AP
- C. Fabric WLCs update the HTDB as new clients connect to the wireless network
- D. Border nodes first register endpoints and then update the HTDB
Answer: C
Explanation:
NEW QUESTION # 123
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. Community
- B. Weight
- C. MED
- D. AS Path
- E. Local Preference
Answer: B
NEW QUESTION # 124
Which design element should an engineer consider when multicast is included in a Cisco SD-Access architecture?
- A. Multicast clients reside in the underlay, and the multicast source is outside the fabric or in the overlay.
- B. Multicast traffic is transported in the overlay and the EID space for wired and wireless clients.
- C. Rendezvous points must be used in a PIM SSM deployment.
- D. PIM SSM must run in the underlay.
Answer: B
Explanation:
Multicast traffic is transported in the overlay, in the EID space, for both wired and wireless clients https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2018/pdf/BRKEWN-2020.pdf
https://www.cisco.com/c/dam/en/us/td/docs/cloud-systems-management/network-automation-and-management/dna-center/deploy-guide/cisco-dna-center-sd-access-wl-dg.pdf
NEW QUESTION # 125
Refer to the exhibit.
When troubleshooting a network problem, a network analyzer is connected to Port f0/1 of a LAN switch. Which command can prevent BPDU transmission on this port?
- A. no spanning-tree link-type shared
- B. spanning-tree portfast bpdufilter default
- C. spanning-tree bpduguard default
- D. spanning-tree portfast bpduguard enable
Answer: B
Explanation:
Explanation/Reference:
NEW QUESTION # 126
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Read the topics of the Cisco 300-420 Exam
Candidates must know the topics before they start of preparation. Because it will really help them in hitting the core. Our Cisco 300-420 exam dumps will include the following topics:
- Network Services 20%
- Advanced Enterprise Campus Networks 25%
- Automation 10%
- Advanced Addressing and Routing Solutions 25%
- WAN for Enterprise Networks 20%
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