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Cisco 300-420 exam covers a wide range of topics, including advanced routing and switching technologies, network virtualization, network automation, and network security. 300-420 exam is designed to test the candidate's knowledge and skills in designing and implementing complex enterprise network solutions that meet the needs of modern businesses.
NEW QUESTION # 111
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. marking
- B. conforming
- C. bursting
- D. shaping
- E. violating
Answer: A,D
NEW QUESTION # 112
An infrastructure team is concerned about the shared memory utilization of a device, and for this reason, they need to monitor the device state. Which solution limits impact on the device and provides the required data?
- A. periodic subscription
- B. static telemetry
- C. on-change subscription
- D. IPFIX
Answer: D
Explanation:
Section: Automation
Explanation
Explanation/Reference:
NEW QUESTION # 113
Which two options help you sell Cisco ISE? (Choose two.)
- A. Discussing the importance of custom profiling
- B. Referring to TrustSec as being only supported on Cisco networks
- C. Showcasing the entire ISE feature set
- D. Explaining ISE support for 3rd party network devices
- E. Downplaying the value of pxGrid as compared to RESTful APIs
Answer: C,D
NEW QUESTION # 114
Which command is needed to enable DHCP snooping if a switchport is connected to a DHCP server?
- A. ip dhcp snooping
- B. ip dhcp trust
- C. ip dhcp snooping information
- D. ip dhcp snooping trust
Answer: D
Explanation:
When configuring DHCP snooping, follow these guidelines:
DHCP snooping is not active until you enable the feature on at least one VLAN, and enable DHCP globally on the switch.
Before globally enabling DHCP snooping on the switch, make sure that the devices acting as the DHCP server and the DHCP relay agent are configured and enabled.
If a Layer 2 LAN port is connected to a DHCP server, configure the port as trusted by entering the "ip dhcp snooping trust" interface configuration command.
If a Layer 2 LAN port is connected to a DHCP client, configure the port as untrusted by entering the no ip dhcp snooping trust interface configuration command.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/ book/snoodhcp.html
NEW QUESTION # 115
Refer to the exhibit.
An architect must design an IPv6 migration solution for an enterprise customer to support these requirements:
* Clients will transition to the new IPv6 network, which provides NAT64 and IPv6 DNS resolution services, using the same DNS name that points to the IPv4 address.
* The service provider will create a client-facing IPv6 interface with a new IPv6 virtual address that points to the same IPv4 DNS server.
* The service provider will support clients that use global IPv6 addresses and encapsulate IPv4 packets into IPv6 tunnels.
Which two migration solutions must the architect choose? (Choose two.)
- A. Use dual-stack lite from the MPLS network to the IGR.
- B. Use dual-stack lite from the devices to the core MPLS network.
- C. Use IPv6 tunneling from the devices to the core MPLS network.
- D. Use NAT44/64 from the devices to the core MPLS network.
- E. Use NAT44/64 from the MPLS network to the IGR.
Answer: B,E
NEW QUESTION # 116
Refer to the exhibit.
Which solution decreases the EIGRP convergence time?
- A. Increase the dead timer value
- B. Increase the hold time value
- C. Enable stub routing on the spokes
- D. Enable subsecond timers
Answer: C
NEW QUESTION # 117
Which control-plane technology allows the same subnet to exist across multiple network locations?
- A. FabricPath
- B. VXLAN
- C. LISP
- D. ISE mobility services
Answer: C
NEW QUESTION # 118 
Refer to the exhibit. Which two points in the network must an engineer configure the ports for explicit trust when using a DiffServ model?
- A. A and D
- B. C and D
- C. F and G
- D. B and E
Answer: D
NEW QUESTION # 119
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. Access Vlans
- B. Switch-to-Switch Connectivity
- C. Switch Virtual Interface
- D. Port Security
- E. Loop Prevention
- F. NTP
- G. VLAN ACL / Port ACL
Answer: B
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 # 120
A network engineer must segregate three interconnected campus networks using IS-IS routing.
A two-layer hierarchy must be used to support large routing domains and to avoid more specific routes from each campus network being advertised to other campus network routers automatically.
Which two actions does the engineer take to accomplish this segregation? (Choose two.)
- A. Designate two IS-IS routers from each campus to act as Level 1/Level 2 backbone routers at the edge of each campus network.
- B. Designate two IS-IS routers as BDR routers at the edge of each campus, and configure one BDR for all Level 1 routers and one BDR for all Level 2 routers.
- C. Assign a unique IS-IS NET value for each campus, and configure internal campus routers with Level 1 routing.
- D. Utilize different MTU values for each campus network segment. Level 2 backbone routers must utilize a larger MTU size of 9216.
- E. Assign the same IS-IS NET value for each campus, and configure internal campus routers with Level 1/ Level 2 routing.
Answer: A,C
NEW QUESTION # 121
Which queuing structure is used on SD-WAN Edge routers?
- A. FIFO
- B. LLQ+WFQ
- C. 1P-4Q-2T
- D. Priority
Answer: B
Explanation:
It uses a combination of low latency queuing (LLQ) and weighted fair queuing (WFQ) to prioritize critical traffic while still guaranteeing bandwidth for other traffic types. The LLQ portion of the queuing structure is used to prioritize certain types of traffic, while the WFQ portion is used to ensure that all traffic is serviced fairly. This queuing structure is used to make sure that critical traffic is not delayed or dropped, while still allowing for other traffic types to be serviced.
NEW QUESTION # 122
An engineer is designing a QoS solution for a campus. The design must guarantee real-time traffic delivery during congestion, minimize the bandwidth consumption for possible virus or worm attacks, and reduce flooding of excessive traffic during times of congestion. Which two solutions must the engineer select?
(Choose two.)
- A. Create a policing policy to drop excessive traffic and a strict queue for real-time traffic.
- B. Apply queuing on the distribution to core links
- C. Apply queuing on the access to distribution links.
- D. Create a shaping policy to drop excessive traffic and a strict queue for real-time traffic.
- E. Create a scavenger queue for excessive traffic and a strict queue for real-time traffic
Answer: A,C
NEW QUESTION # 123
An engineer must design a large Layer 2 domain that contains hundreds of switches and VLANs. The engineer's primary goals are to:
* Efficiently utilize the bandwidth of all links
* Avoid Layer 2 loops
* Cause minimal impact on switch CPU and memory
Which technology should the engineer include in the design?
- A. RSTP
- B. MST
- C. Rapid PVST+
- D. PVST+
Answer: B
NEW QUESTION # 124 
Refer to the exhibit An engineer working for a telecommunication company with an employee ID 4449:30
959 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. 0
- B. 1
- C. 2
- D. 3
Answer: B
NEW QUESTION # 125
A network engineer must design a multicast solution to prevent the spoofing of multicast streams and ensure efficient bandwidth utilization. The network will be merged with another multicast domain in the future, and the merge must require minimum effort. Which two solutions meet the customer requirements? (Choose two.)
- A. IGMPv2
- B. IGMPv3
- C. MSDP
- D. PIM-SM
- E. PIM-SSM
Answer: C,D
Explanation:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-16/imc-pim-xe-16-book/imc-msdp-im-pim-sim.html#GUID-4B201DB3-2C27-4F98-977A-A1AE9DC39C21 MSDP is a mechanism to connect multiple PIM-SM domains. The purpose of MSDP is to discover multicast sources in other PIM domains. The main advantage of MSDP is that it reduces the complexity of interconnecting multiple PIM-SM domains by allowing PIM-SM domains to use an interdomain source tree (rather than a common shared tree).
NEW QUESTION # 126
Which consideration must be made when designing a Cisco SD-Access fabric underlay?
- A. Subnets must be reduced to decrease latency.
- B. The default MTU should be increased.
- C. Up to six control planes are supported.
- D. A unified policy must be used.
Answer: C
NEW QUESTION # 127
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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.
Cisco 300-420 exam is designed to assess the knowledge and skills required to design enterprise networks. 300-420 exam is aimed at network professionals who are responsible for designing, implementing, and managing networks in an enterprise environment. 300-420 exam tests the candidates' ability to design scalable and reliable networks that meet the business requirements of an organization.
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