March/2021 Latest Braindump2go 300-420 Exam Dumps with PDF and VCE Free Updated Today! Following are some new 300-420 Real Exam Questions!
An architect is designing a multicast solution for a network that contains over 100 routers. The architect plans to create several multicast domains and balance the PIM-SM traffic within the network. Which technology should the architect include in the design?
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. BPDU guard
C. loop guard
D. root guard
An engineer is designing a Layer 3 campus network running EIGRP between the core, aggregation, and access layers. The access layer switches will be connected to the aggregation layer using Layer 3 copper connections. The engineer wants to improve convergence time for access layer switch failures. Which technique must the design include?
A. enabling BFD for EIGRP on the access layer uplinks
B. reducing the EIGRP Hello / Hold timer values
C. EIGRP summarization from core to aggregation layer
D. EIGRP summarization from access to aggregation layer
An engineer must design a solution to provide backup connectivity between two sites. The engineer plans to use an Internet connection but company policy requires the connection to be encrypted. Additionally, there are several applications that utilize multicast to deliver video streams between the sites. Which technology should the design include?
A. GRE over IPsec
B. IPsec direct encapsulation
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. Implement BED asynchronous mode between peers with low CPU resources.
C. Enable BFD multi-hop on the devices with low CPU resources.
D. Utilize carrier delay on all routers in the network.
Refer to the exhibit. An engineer is designing a BGP solution for a client that peers with ISP1 for full Internet connectivity and with ISP2 for direct exchange of routes for several third parties. Which action, when implemented on the edge routers, enables the client network to reach the Internet through ISP1?
A. Run an eBGP session within different VRFs for each ISP.
B. Advertise a default route for downstream routers within the client network.
C. Apply the AS path prepend feature for ISP2.
D. Apply route filtering such that the client advertises only routes originated from its own AS.
An architect is working on a design to connect a company’s main site to several small to medium- sized remote branches. The solution must include redundant WAN links, but the customer has a limited budget and wants the ability to increase the link speed easily in the future. QoS will not on the branch routers so there is no need for consistent end-to-end QoS. Which solution does the architect propose?
A. dual-homed WAN MPLS with single edge router
B. dual-homed Internet with a single edge router running a site-to-site VPN topology
C. dual-homed WAN MPLS and Internet links via dual edge routers
D. dual-homed Internet with dual edge routers running a hub-and-spoke VPN topology
Refer to the exhibit. An architect must design an IP addressing scheme for a multisite network connected via a WAN transit. The campus site must accommodate 12,000 devices and the branch sites must accommodate 1,000 devices. Which address scheme optimizes network device resources, contains convergence events to the different blocks of the network, and ensures future growth of the network?
A. Campus: 10.0.0.0/18
B. Campus: 10.0.0.0/16
C. Campus: 10.0.0.0/10
D. Campus: 10.0.0.0/20
An engineer must design a solution to connect a customer to the Internet. The solution will include a Layer 3 circuit with a CIR of 50 Mbps from the service provider. The hand-off from the provider’s switch to the customer’s router is 1Gbps. Which solution should the engineer include to prevent potential issues with choppy voice traffic?
A. Reduce the bandwidth of the connection to the router.
B. Implement hierarchical QoS with a parent policing policy.
C. Implement hierarchical QoS with a parent shaping policy
D. Add a bandwidth statement to the router interface.
Refer to the exhibit. Customers report low video quality and delays when having point-to-point telepresence video calls between the two locations. An architect must optimize a design so that traffic follows the same path for egress and ingress traffic flows. Which technique optimizes the design?
A. Configure route leaking on the router in area 2.
B. Configure route leaking on he router in area 1.
C. Configure the high metric on the router in area 4.
D. Configure route filter on the router in area 4.
An engineer must design a scalable QoS architecture that allows the separation of the traffic into classes on predefined business requirements. The design must also utilize the differentiated services code points as the QoS priority descriptor value and support at least 10 levels of classification. Which QoS technology should the engineer include in the design?
C. Best Effort
Refer to the exhibit. Area 10 is a regular OSPF area and networks 10.1.1.0/24 and 172.16.1.0/24 are internal. Which design provides optimal routing between both networks when the link between routers C and E fails?
A. Move the link between routers C and D to area 10.
B. Create an OSPF virtual link between routers E and F.
C. Create a tunnel between routers E and F in area 10.
D. Make area 10 a not-so-stubby area.
An architect is creating a migration strategy for a large organization in which the choice made by the application between IPv6 and IPv4 is based on the DNS request. Which migration strategy does the architect choose?
A. AFT for public web presence
B. host-initiated tunnels
C. dual stack
D. site-to-site IPv6 over IPv4 tunnels
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 stub.
C. Make area 1 a standard OSPF area.
D. Make the area 1 routers part of area 0.
An engineer must propose a solution for a campus network that includes the capability to create multiple Layer 3 virtual networks. Each network must have its own addressing structure and routing table for data forwarding. The solution must be scalable to support hundreds of virtual networks and allow simple configuration and management with minimal administrative overhead. Which solution does the engineer recommend?
A. hop-by-hop EVN
B. multihop MPLS core
C. multihop IPsec tunneling
D. hop-by-hop VRF-Lite
A. use multiple equal-cost links
B. use an IGP
C. use HSRP
D. use RPVSTP+
E. use multiple unequal-cost links
An engineer is tasked with designing a dual BGP peering solution with a service provider. The design must meet these conditions:
– The routers will not learn any prefix with a subnet mask greater than /24.
– The routers will determine the routes to include in the routing table based on the length of the mask alone.
– The routers will make this selection regardless of the service provider configuration.
Which solution should the engineer include in the design?
A. Use a route map and access list to block the desired networks, and apply the route map to BGP neighbors inbound.
B. Use a route map and prefix list to block the desired networks, and apply the route map to BGP neighbors outbound.
C. Use an IP prefix list to block the desired networks and apply the IP prefix list to BGP neighbors outbound.
D. Use an IP prefix list to block the desired networks and apply the IP prefix list to BGP neighbors inbound.
An engineer is designing an EIGRP network for a small branch site where there is only one Layer 3 router. The engineer wants the router to advertise the local LAN network to remote EIGRP neighbors without sending any unnecessary multicast messages on the local LAN.
Which action should the engineer take?
A. Use a static default route for this site instead of EIGRP
B. Advertise the local LAN using the network command and the passive-interface feature
C. Redistribute the local LAN network using the redistribute connected command
D. Advertise the local LAN subnet as a stub network
A network engineer is redesigning a company’s QoS solution. The company is currently using IP Precedence, but the engineer plans to move to DiffServ. It is important that the new solution provide backward compatibility with the current solution. Which technology should the design include?
A. expedited forwarding
B. assured forwarding
C. class selector code points
D. default per hop behavior
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. Implement MST instead of STP.
C. Use VTP to propagate VLAN information and to prune unused VLANs.
D. Configure broadcast and multicast storm control on all switches.
E. Configure dynamic trunking protocol to propagate VLAN information.
How is sub-second failure of a transport link detected in a Cisco SD-WAN network?
A. Hellos are sent between the WAN Edge routers and the vSmart controller.
B. BFD runs on the IPsec tunnels between WAN Edge routers.
C. BGP is used between WAN Edge routers and the vSmart controller.
D. Link state change messages are sent between vSmart controllers.
A. down bit
B. split horizon
C. route tags
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