300-420 Online Practice Questions and Answers

An enterprise customer has these requirements:

1.

end-to-end QoS for the business-critical applications and VoIP services based on CoS marking.

2.

flexibility to offer services such as IPv6 and multicast without any reliance on the service provider.

3.

support for full-mesh connectivity at Layer 2.

Which WAN connectivity option meets these requirements?

A. VPWS

B. MPLS VPN

C. DMVPN

D. VPLS

Which two routing protocols allow for unequal cost load balancing? (Choose two.)

A. EIGRP

B. IS-IS

C. BGP

D. OSPF

E. RIPng

Which control-plane technology allows the same subnet to exist across multiple network locations?

A. LISP

B. VXLAN

C. FabricPath

D. ISE mobility services

A branch office has a primary L3VPN MPLS connection back to the main office and an IPSEC VPN tunnel that serves as backup. Which design ensures that data is sent over the backup connection only if the primary MPLS circuit is down?

A. Use EIGRP to establish a neighbor relationship with the main office via L3VPN MPLS and the IPSEC VPN tunnel.

B. Use BGP with the multipath feature enabled to force traffic via the primary path when available.

C. Use static routes tied to an IP SLA to prefer the primary path while a floating static route points to the backup connection.

D. Use OSPF with a passive-interface command on the backup connection.

When a first hop redundancy solution is designed, which protocol ensures that load balancing occurs over multiple routers using a single virtual IP address and multiple virtual MAC addresses?

A. GLBP

B. IRDP

C. VRRP

D. HSRP

Which two border nodes are available in the Cisco SD-Access architecture? (Choose two.)

A. extended border

B. edge border

C. internal border

D. anywhere border

E. intermediate border

An engineer is tasked with designing a dual BGP peering solution with a service provider. The design must meet these conditions:

1.

The routers will not learn any prefix with a subnet mask greater than /24.

2.

The routers will determine the routes to include in the routing table based on the length of the mask alone.

3.

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.

Refer to the exhibit. An architect must create a stable and scalable EIGRP solution for a customer. The design must:

1.

conserve bandwidth, memory, and CPU processing

2.

prevent suboptimal routing

3.

avoid any unnecessary queries

Which two solutions must the architect select? (Choose two.)

A. route summarization

B. prefix lists

C. distribute lists

D. stub routing

E. static redistribution

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 classify and mark traffic traveling between branch sites?

A. CBWFQ with DSCP AF2

B. LLQ with DSCP EF

C. CBWFQ with DSCP AF3

D. LLQ with DSCP AF4

An engineer is designing a multicast network for a company specializing in VoD content. Receivers are across the Internet, and for performance reasons, the multicast framework must be close to the receivers within each AS. For high availability, if the sources in one AS are no longer available, the receivers of that AS must be able to receive the VoD content from the sources in another AS. Which feature must the design include?

A. SSM

B. anycast RP

C. bidirectional PIM

D. MSDP