300-420 Exam Questions

Total 318 Questions

Last Updated Exam : 2-Jun-2025

Which type of rendezvous point deployment is standards-based and support dynamic RP discovery?


A.

Auto-RP


B.

Anycast-RP


C.

bootstrap router


D.

static RP





C.
  

bootstrap router



Drag and drop the properties from the left onto the Cisco SD-WAN components that perform them on the right.






Which two routing protocols allow for unequal cost load balancing? (Choose two.)


A.

EIGRP


B.

IS-IS


C.

BGP


D.

OSPF


E.

RIPng





A.
  

EIGRP



C.
  

BGP



When vEdge router redundancy is designed, which FHRP is supported?


A.

HSRP


B.

OMP


C.

GLBP


D.

VRRP





D.
  

VRRP



An engineer must design a large Layer 2 domain that contains hundreds of switches and
VLANs. The engineer's primary goals are to:
•Efficiently utilize the bandwidth of all links
•Avoid Layer 2 loops
•Cause minimal impact on switch CPU and memory
Which technology should the engineer include in the design?


A.

PVST+


B.

Rapid PVST+


C.

MST


D.

RSTP





C.
  

MST



Which two functions are provided by the Cisco SD-WAN orchestration plane? (Choose two.)


A.

centralized provisioning


B.

primary authentication point


C.

NAT traversal facilitation


D.

Zero Touch Provisioning


E.

troubleshooting and monitoring





B.
  

primary authentication point



C.
  

NAT traversal facilitation



How are wireless endpoints registered in the HTDB in a Cisco SD-Access architecture?


A.

Fabric edge nodes update the HTDB based on CAPPWAP messaging from the AP


B.

Fabric WLCs update the HTDB as new clients connect to the wireless network


C.

Border nodes first register endpoints and then update the HTDB


D.

Fabric APs update the HTDB with the clients' ElD and RLOC





B.
  

Fabric WLCs update the HTDB as new clients connect to the wireless network



An architect must address sustained congestion on the access and distribution uplink of
network. QoS has already been implemented and optimized, but it is no longer effective in
ensuring optimal network performance. Which two solutions should the architect use to
improver network performance? (Choose two)


A.

Reconfigure QoS based on the IntServ model


B.

Utilize random early detection to manage queues


C.

Implement higher-speed uplink interfaces


D.

Bundle additional uplinks into logical EtherChannels


E.

Configure selective packet discard to drop noncritical network traffic





B.
  

Utilize random early detection to manage queues



E.
  

Configure selective packet discard to drop noncritical network traffic



A company's security policy requires that all connections between sites be encrypted in a manner that does not require maintenance of permanent tunnels. The sites are connected through a private
MPLS-based service that
uses a dynamically changing key and spoke-to-spoke communication. Which type of
transport encryption must
be used in this environment?


A.

GETVPN


B.

DMVPN


C.

GRE VPN


D.

standard IPsec VPN





A.
  

GETVPN



An architect is designing a network that will utilize the spanning tree protocol to ensure a
loop-free topology. The network will support an engineering environment where it is
necessary for end users to connect their own network switches for testing purposes. Which
feature should the architect include in the design to ensure the spanning tree topology is
not affected by these rogue switches?


A.

BPDU Skew Detection


B.

BPDU guard


C.

loop guard


D.

root guard





D.
  

root guard




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