300-420 Online Practice Questions and Answers

What is an advantage of designing an out-of-band network management solution?

A. In the event of a production network outage, network devices can still be managed.

B. There is no separation between the production network and the management network.

C. In the event of a production network outage, it can be used as a backup network path.

D. It is less expensive than an in-band management solution

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 feature is used to optimize WAN bandwidth of IGMP network traffic among WAN Edge routers in the same VPN?

A. IGMPv2

B. multicast RP

C. multicast-replicator

D. multicast service routes

In the SD-WAN underlay network, which WAN Edge VPN ID is defined as the transport VPN and is used to carry control traffic?

A. VPN 0

B. VPN 512

C. VPN 128

D. VPN 256

Which queuing structure is used on SD-WAN Edge routers?

A. FIFO

B. LLQ+WFQ

C. 1P-4Q-2T

D. Priority

An engineer is designing a WAN solution for a customer with teams in different branch locations that need to communicate The teams also need to access enterprise applications hosted in the data center and the cloud The customer also must provide guests with connectivity to the internet only, and the internet gateway is located in the data center

Which solution must the engineer choose?

A. WAN connectivity from a different service provider for guests

B. firewall placed in data center that fitters any traffic from guests

C. MPLS Layer 3 VPN with one VRF for corporate access and a separate VRF for guests

D. MPLS Layer 3 VPN with a separate VRF for each branch location

Refer to the exhibit.

An architect is designing a Layer 3 campus network. The design must hide network instability, reduce network overhead, and conserve critical device memory. Which route summarization solution must the architect select?

A.

The aggregation layer must advertise a default route toward the core layer.

The VLAN subnets must be summarized into 10.0.0.0/16 at the aggregation layer and advertised to the access layer.

B.

The core layer must advertise a default route toward the aggregation layer.

The VLAN subnets must be summarized into 10.0.0.0/16 at the aggregation layer and advertised to the core layer.

C.

The aggregation layer must advertise a default route toward the access layer.

The VLAN subnets must be summarized into 10.0.0.0/16 at the aggregation layer and advertised to the core layer.

D.

The core layer must advertise a default route toward the aggregation layer.

The VLAN subnets must be summarized into 10.0.0.0/16 at the access layer and advertised to the aggregation layer.

Which feature minimizes TLOC connections and reduces strain on the vSmart controller in an SD-WAN architecture?

A. control-direction

B. affinity

C. color

D. control-connections

An architect is designing a network for an enterprise site. The design must use an active/backup design for the WAN. It must guarantee the SLA for several applications regardless of which connection is used. Which deployment model should the architect choose?

A. hybrid WAN using MPLS VPN and internet VPN from two separate ISPs

B. MPLS WAN from two separate ISPs

C. internet WAN from two separate ISPs

D. hybrid WAN using MPLS VPN and internet VPN from a single ISP

An engineer is designing a QoS solution for a customer. The customer's internet connection has a bandwidth of 10 Mbps. The design must ensure that traffic bursts of data do not exceed the bandwidth of the connection and that received traffic does not starve out business-critical traffic. Which solution must the engineer choose?

A. Configure the queuing default queue for shaping inbound and policing inbound.

B. Configure the queuing default queue for shaping inbound and policing outbound.

C. Configure the queuing default queue for shaping outbound and policing inbound.

D. Configure the queuing default queue for shaping outbound and policing outbound.