300-420 Online Practice Questions and Answers

Which solution allows overlay VNs to communicate with each other in an SD-WAN Architecture?

A. External fusion routers can be used to map VNs to VRFs and selectively route traffic between VRFs.

B. GRE tunneling can be configured between fabric edges to connect one VN to another.

C. SGTs can be used to permit traffic from one VN to another.

D. Route leaking can be used on the fabric border nodes to inject routes from one VN to another.

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

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 PIM mode uses a shared tree only?

A. bidirectional

B. sparse

C. dense

D. source-specific

What is the purpose of a Cisco SD-Access underlay network?

A. to abstract IP-based connectivity from physical connectivity

B. to emulate LAN segments to transport Layer 2 frames over a Layer 3 network

C. to establish physical connectivity between switches and routers

D. to provide virtualization by encapsulating network traffic over IP tunnels

An engineer is creating a design to enable IPv6 to run on an existing IPv4 IS-IS network. The IPv4 and IPv6 topologies will match exactly, and the engineer plans to use the same IS-IS router levels for each protocol per interface. Which IS-IS design is required?

A. multi topology without enabling transition feature

B. multi topology with transition feature enabled

C. single topology without enabling transition feature

D. single topology with transition feature enabled

Which node performs the LISP Map-Server and Map-Resolver functions in the Cisco SD-Access network architecture?

A. control plane node

B. fabric edge node

C. border node

D. intermediate node

Refer to the exhibit.

An engineer must design an address translation solution to provide Internet connectivity for the corporate network. The design Is restricted to the 172.16.168.0/22 subnet. Which solution must the engineer choose?

A. stateful NAT64

B. stateless NAT64

C. stateful NAT66

D. stateless NAT66

Refer to the exhibit. A network engineer working for a private service provider with an employee ID: 1234:56:789 must design a BGP solution based on:

All traffic originating from AS100 must pass through AS200 to reach the NTP and DHCP server

When a link failure occurs between R3 and R4, traffic must follow the R2-R9 link to reach the NTP and DHCP server

Which solution must the design include?

A. Routers R3 and R10 advertise an IGP metric into BGP during redistribution in both directions

B. Router R6 influences the paths of R9 and R11 to the DC with a higher AS-PATH value

C. Routers R3 and R10 advertise a lower local preference for outgoing traffic and a higher AS-PATH value for incoming traffic

D. Router R3 applies a local preference of 200 for R1, R2, R9, and R11 routers to reach the data center

DRAG DROP

Drag and drop the descriptions from the left onto the Cisco SD-WAN component they describe on the right.

Select and Place: