Cisco 300-420 Practice Test - Questions Answers, Page 19
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An engineer is designing an IPv4 addressing plan for an enterprise with 1000 branches. Each branch requires a prefix for data and a prefix for voice. Each prefix must accommodate up to 128 hosts, and prefixes must facilitate summarization at aggregation points in the network. The security team requires a simple method for identifying voce prefixes. Which allocation does the engineer recommend from the RFC1918 address space?
/24 prefixes for data from 10.0.0.0/15 and /24 prefixes for voice from 172.16.0.0/15
/24 prefixes for data from 10.0.0.0/8 and /24 prefixes for voice from the next contiguous /24 prefix per site
/25 prefixes for data from 10.0.0.0/8 end /25 prefixes for voice from the next contiguous /25 prefix per branch
/24 prefixes for data from 10.0.0.0/8 and /24 prefixes for voice from 172.16.0.0/12
Answer: B
An engineer is designing a PIM Anycast RP solution between two data centers. The design must ensure that RP1 in DC1 and RP2 in DC2 inform each other about specific sources that have joined locally. Which solution must the engineer choose?
Provision the RPs on the same IP subnet and extend the subnet at Layer 2 between data centers
Enable MSDP between RPs using separate unique loopback interfaces
Enable MSDP between RPs using the configured Anycast RP address
No action is required because PIM registers from the source will, by default, reach each RP
An engineer is designing a BGP network for a large customer. To permit efficient scaling, the BGP domain is split into clusters. Which peering solution should be used between the route reflectors in different clusters for the BGP routes to be propagated appropriately?
The route reflectors should be made dents of each other.
The route reflectors should be nonclients with regards to each other.
The route reflectors should not have any kind of BGP peering.
The route reflectors should have peering through another nonclient router.
An architect must design an IPv6 migration solution for a corporation with remote offices to support:
* The customer has IPv4 peering with their service provider.
* IPv6 users need access to IPv4 and IPv6 resources.
* Existing content providers will migrate to IPv6 in the next two years.
* Users will be migrated in a phase-by-phase approach.
Which migration solution must the architect choose?
NAT46
tunneling
NAT64
dual-stack
A company uses cloud-based applications for voice and video calls, file sharing, content sharing, and messaging. During business hours, these applications randomly become slow and unresponsive.
However, other applications work smoothly with the current applied QoS polices. Which solution must the company choose to resolve the issue?
Identify the applications with NBAR2 and allocate the required bandwidth accordingly.
Identify the port used by each application and apply a minimum bandwidth guarantee.
Identify the applications and reserve the required bandwidth on the perimeter routers.
Identify the application ports, create groupings, and rate-limit the required bandwidth.
Which design achieves SD-WAN control plane redundancy?
Configuring BFD on the WAN Edge routers
Using multiple instances of vManage in clusters
Deploying using a virtual platform like UCS or CSP
Managing the underlay network with OMP
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?
Aggressive OSPF timers
LFA FRR
Incremental SPF
BFD
A network engineer must design an MSDP multicast solution to provide RP resilience in a network with two separate domains. Also, multicast sources and receivers must register with the local RP.
Which solution must the engineer choose?
Configure the RP has value to 0, and traffic will route to the closest RP
Configure the RP loopback interface with the same IP address/32, and traffic will route to the closest RP
Configure the RP group ranges to split the multicast traffic, and traffic will route to the longest match
Configure the RP priority with the same value, and traffic will route to the closest RP
Refer to the exhibit.
The failover time of ISP-2 is significantly shorter than ISP-1 when an interface on the ISP router toward the campus network fails. Which solution minimizes the downtime to the sub-second?
Aggressive timers
Next-hop address tracking
Graceful-restart
BFD
Refer to the exhibit.
An architect is designing an EIGRP solution based on these requirements:
* Traffic forwarding should use the best two paths while all links are available
* Single path failure must not impact traffic between branch and HQ
Which solution must the architect select?
Maximum-paths 2
Add-paths 2
Metric weights 010100
Variance 2
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