Cisco CCNP Enterprise 300-420 Questions & Answers

• Question 211:

  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

  Correct Answer: B

• Question 212:

  Which design consideration must be made when dual vEdge routers are deployed at a branch site?

  A. Use BGP AS-path prepending to influence egress traffic and use MED to influence ingress traffic from the branch.

  B. HSRP priorities must match the OMP routing policy to prefer one vEdge over the other.

  C. Traffic must be symmetrical as it egresses the vEdges and returns from remote sites for DPI to function properly.

  D. Configure BFD between vEdge routers to detect sub-second link failures.

  Correct Answer: C

• Question 213:

  When IPsec VPNs are designed, what is a unique requirement if support for IP Multicast is required?

  A. encapsulation of traffic with GRE or VTI

  B. IPsec forwarding using transport mode

  C. additional bandwidth for headend

  D. IPsec forwarding using tunnel mode

  Correct Answer: A

• Question 214:

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

  A. A VRF fusion router is used to map resources in one VN to another VN

  B. Fabric borders use VRFs to map VNs to VRFs

  C. SD-Access transit links are used to transport encapsulated traffic from one fabric to another

  D. A fabric edge is used to de-encapsulate VXLAN traffic to normal IP traffic then transported over the outside network

  Correct Answer: B

  "Packets and frames sourced from inside the fabric and destined outside of the fabric are de-encapsulated by the border node"(not the edge node) https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html

• Question 215:

  An engineer is working for a large cable TV provider that requires multiple sources streaming video on different channels using multicast with no rendezvous point. Which multicast protocol meets these requirements?

  A. PIM-SM

  B. PIM-SSM

  C. any-source multicast

  D. BIDIR-PIM

  Correct Answer: B

  PIM-SSM is suitable for when well-known sources exist within the local PIM domain and for broadcast applications. Also, PIM-SSM eliminates the RPs and shared trees

• Question 216:

  An engineer must design a multicast network for a financial application. Most of the multicast sources also receive multicast traffic (many-to-many deployment model). To better scale routing tables, the design must not use source trees. Which multicast protocol satisfies these requirements?

  A. PIM-SSM

  B. PIM-SM

  C. MSDP

  D. BIDIR-PIM

  Correct Answer: D

  https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/ipmulti_pim/configuration/xe-16/imc-pim-xe-16-book/imc-tech-oview.html

  Bidir-PIM is designed to be used for many-to-many applications within individual PIM domains. Multicast groups in bidirectional PIM mode can scale to an arbitrary number of sources without incurring overhead due to the number of sources.

• Question 217:

  A company is using OSPF between its HQ location and a branch office. HQ is assigned area 0 and the branch office is assigned area 1. The company purchases a second branch office, but due to circuit delays to HQ, it decides to connect the new branch office to the creating branch office as a temporary measure. The new branch office is assigned area 2. Which OSPF configuration enables all three locations to exchange routes?

  A. The existing branch office must be configured as a stub area

  B. A virtual link must be configured between the new branch office and HQ

  C. A sham link must be configured between the new branch office and HQ

  D. The new branch office must be configured as a stub area

  Correct Answer: B

• Question 218:

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

  A. underlay, MPLS, and overlay

  B. primary, backup, and load-balanced

  C. prefix, TLOC, and service

  D. Internet, MPLS, and backup

  Correct Answer: C

• Question 219:

  A network solution is being designed for a company that connects to multiple Internet service providers. Which Cisco proprietary BGP path attribute will influence outbound traffic flow?

  A. Local Preference

  B. MED

  C. Weight

  D. AS Path

  E. Community

  Correct Answer: C

• Question 220:

  Refer to the exhibit.

  

  EIGRP has been configured on all links. The spoke nodes have been configured as EIGRP stubs, and the WAN links to R3 have higher bandwidth and lower delay than the links to R4. When a link failure occurs at the R1-R2 link, what happens to traffic on R1 that is destined for a subnet attached to R2?

  A. R1 has no route to R2 and drops the traffic

  B. R1 load-balances across the paths through R3 and R4 to reach R2

  C. R1 forwards the traffic to R3, but R3 drops the traffic

  D. R1 forwards the traffic to R3 in order to reach R2

  Correct Answer: A

  The EIGRP stub routing feature will prevent the remote device from advertising core routes back to the distribution devices. Routes learned by the remote device from Distribution 1 will not be advertised to Distribution 2. Therefore, Distribution 2 will not use the remote device as a transit for traffic destined to the network core

  https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-mt/ire-15-mt-book/ire-eigrp-stub-rtg.html