Free Designing Cisco Enterprise Networks (300-420 ENSLD) Exam 300-420 Exam Practice Test

What is the purpose of a TLOC extension in a Cisco SD-WAN network fabric?

• to facilitate WAN Edge router redundancy within a site
• to identify the physical interface where a WAN Edge router connects to the WAN transport network
• to expand the number of colors that are potentially applied to a network transport interface
• to aggregate multiple physical interfaces into a single logical Interface

Which protocol is deployed through LAN automation to build node-to-node underlay adjacencies in SDA?

• IS-IS
• OLISP
• OSPF
• VXLAN

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

• In the event of a production network outage, network devices can still be managed.
• There is no separation between the production network and the management network.
• In the event of a production network outage, it can be used as a backup network path.
• It is less expensive than an in-band management solution

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

• VPN 0
• VPN 512
• VPN 128
• VPN 256

A client is moving to Model-Driven Telemetry and requires periodic updates. What must the network architect consider with this design?

• Updates that contain changes within the data are sent only when changes occur.
• Empty data subscriptions do not generate empty update notifications.
• Periodic updates include a full copy of the data that is subscribed to.
• The primary push update is sent immediately and cannot be delayed.

How is sub-second failure of a transport link detected in a Cisco SD-WAN network?

• Hellos are sent between the WAN Edge routers and the vSmart controller.
• BFD runs on the IPsec tunnels between WAN Edge routers.
• BGP is used between WAN Edge routers and the vSmart controller.
• Link state change messages are sent between vSmart controllers.

Which routes does the overlay management protocol advertise in an SD-WAN overlay?

• underlay, MPLS, and overlay
• primary, backup, and load-balanced
• prefix, TLOC, and service
• Internet, MPLS, and backup

A network engineer must connect two sites across a public network using a secure tunneling technology thatsupports multicast traffic. Which technology must be chosen?

• IPsec
• GRE
• PPTP
• GRE over IPsec

How do endpoints inside an SD-Access network reach resources outside the fabric?

• a VRF fusion router is used to map resources in one VN to another VN
• Fabric borders use VRFs to map VNs to VRFs
• SD-Access transit links are used to transport encapsulated traffic from one fabric to another
• A fabric edge is used to de-encapsulate VXLAN traffic to normal IP traffic then transported over the outside network

An engineer must design a QoS solution for a customer. The network currently supports data only, but thecustomer will roll out VoIP and IP video in conjunction with the new QoS solution. The engineer plans to useDiffServ. To ensure priority for voice services, which model must the design include?

• 8-class model
• 4-class model
• 6-class model
• 12-class model