Cisco 300-420 Practice Test - Questions Answers, Page 9
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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?
BPDU Skew Detection
BPDU guard
loop guard
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?
enabling BFD for EIGRP on the access layer uplinks
reducing the EIGRP Hello / Hold timer values
EIGRP summarization from core to aggregation layer
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?
GRE over IPsec
IPsec direct encapsulation
GETVPN
DMVPN
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?
Implement slow timers between peers with low CPU resources.
Implement BED asynchronous mode between peers with low CPU resources.
Enable BFD multi-hop on the devices with low CPU resources.
Utilize carrier delay on all routers in the network.
Refer to the exhibit.
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?
Run an eBGP session within different VRFs for each ISP.
Advertise a default route for downstream routers within the client network.
Apply the AS-path prepend feature for ISP2.
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 mediumsized 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?
dual-homed WAN MPLS with single edge router
dual-homed Internet with a single edge router running a site-to-site VPN topology
dual-homed WAN MPLS and Internet links via dual edge routers
dual-homed Internet with dual edge routers running a hub-and-spoke VPN topology
Refer to the exhibit.
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?
• Campus: 10.0.0.0/18
Branch1: 10.0.192.0/21
Branch2: 10.0.200.0/21
• Campus: 10.0.0.0/16
Branchi: 10.255.0.0/20
Branch2: 10.255.16.0/20
• Campus: 10.0.0.0/10
Branch1: 10.64.0.0/10
Branch2: 10.128.0.0/10
• Campus: 10.0.0.0/20
Branch1: 10.0.64.0/21
Branch2: 10.0.128.0/21
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?
Reduce the bandwidth of the connection to the router.
Implement hierarchical QoS with a parent policing policy.
Implement hierarchical QoS with a parent shaping policy.
Add a bandwidth statement to the router interface.
Refer to the exhibit.
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?
Configure route leaking on the router in area 2.
Configure route leaking on the router in area 1.
Configure the high metric on the router in area 4.
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?
RSVP
Diffserv
Best effort
Interserv
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