Questions for the 300-420 were updated on : Dec 01 ,2025
An architect is designing a network solution for a customer The network is IPv6-only with 1000 hosts.
The design must provide external access to up to 10 concurrent IPv6 hosts to allow communication
with legacy IPv4 devices on an adjacent network. The customer set aside 10 IPv4 addresses to allow
for one-to-one communication between hosts. Which solution must the architect select?
A
In PIM sparse mode, if an RPF check is successful on a multicast-enabled device, what happens to the
multicast packet?
A
An enterprise needs to enhance its WAN availability after a recent outage with its only MPLS
provider. The proposed solution must have a quick deployment, be affordable, be reliable, and work
as a backup for the enterprise's primary MPLS connection. Which solution meets these
requirements?
A
A customer requested that a guaranteed service line be enabled for a manufacturing business in
different countries. On the customer side, the QoS-aware application is used to process large data
chunks. The application cannot tolerate drops and latency should be as low as possible. Which QoS
model must an engineer employ to use the minimum required resources on the ISP network nodes?
C
What is the main purpose of the Cisco SD-Access underlay design?
D
What is the purpose of Cisco vBond as a Session Traversal Utilities for NAT server?
D
DRAG DROP
Drag and drop the Cisco Catalyst SD-WAN components from the left to their definitions on the nght
None
Explanation:
Refer to the exhibit.
Refer to the exhibit An architect is designing an IPv4 plan using the 172 20 0.0/16 network The
design must maximize the number of subnets and minimize the number of wasted IP addresses In
addition, the plan must allocate a subnet to these customers and links
Customer A, which supports 125 hosts
Customer D, which supports 62 hosts
Links B C. and E
Which two configuration sets meet these requirements'? (Choose two)
A)
B)
C)
D)
E)
A, C
Refer to the exhibit.
Refer to the exhibit An engineer with an employee ID: 1234 56:789 must design a WoL deployment
for a client, and the design must ensure that the Windows PCs are responsive to the WoL magic
packets with no delays when the server-side initiates the instruction Which action must the engineer
choose?
B
Currently, inter-VRF routing between the global routing table and VRF-A is accomplished on the
client firewall, but the customer wants to do this on the core network layer. The customer does not
want to run BGP, VRF-Lite: or static routing Which mechanism meets the requirements?
D
What is a challenge of the SaaS model?
B
Refer to the exhibit.
Refer to the exhibit A customer requires a Layer 2 network designed to support:
500 active logical ports
trunking of 30 VLANs
convergence of less than 1 second
Which Spanning Tree Protocol must be selected?
A
When expanding an existing Cisco SD-Access network, in addition to the control plane, which two
device roles are needed to create an additional fabric site? (Choose two.)
D, E
A company wants to enable several third-party video conferencing networks based on multicast
services. The video conferencing platform can accommodate numerous and dispersed senders and
receivers in third-party networks The interior routing protocol is OSPF and the exterior routing
protocol is BGP Which multicast mode must be selected to achieve this goal?
B
Which integration capability does gRPC provide?
C