300-420 Practice Test

A customer is discussing QoS requirements with a network consultant. The customer has
specified that end-to-end path verification is a requirement. Which QoS solution meets this
requirement?

A.

IntServ model with RSVP to support the traffic flows

B.

DiffServ model with PHB to support the traffic flows

C.

marking traffic at the access layer with DSCP to support the traffic flows

D.

marking traffic at the access layer with CoS to support the traffic flows

An engineer must use YANG with an XML representation to configure a Cisco IOS XE
switch with these specifications:
IP address 10.10.10.10/27 configured on the interface GigabitEthernet2/1/0
connectivity from a directly connected host 10.10.10.1/27
Which YANG data model set must the engineer choose?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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.

What is one function of the vSmart controller in an SD-WAN deployment?

A.

orchestrates vEdge and cEdge connectivity

B.

responsible for the centralized control plane of the SD-WAN network

C.

provides centralized network management and a GUI to monitor and operate the SD-WAN overlay

D.

provides a data-plane at branch offices to pass traffic through the SD-WAN
network

Which function are fabric intermediate nodes responsible for in an SD-Access
Architecture?

A.

mapping EIDs to RLOCs

B.

encapsulating user traffic in a VXLAN header including the SGT

C.

registering new endpoints in the HTDB

D.

transporting IP packets between edge nodes and border nodes