Free Cisco 300-420 Practice Questions 2026 | Designing Cisco Enterprise Networks (ENSLD)

Which QoS feature responds to network congestion by dropping lower priority packets?

A.

CBWFQ

B.

tail drop

C.

WRED

D.

strict priority

Which NETCONF operation creates filtering that is specific to the session notifications?

A.

<create-subscription>

B.

<commit>

C.

<notification>

D.

<logging>

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

Refer to the exhibit. An architect must design a solution to connect the network behind R3
with the EIGRP network. Which mechanism should be included to avoid routing loops?

A.

split-horizon

B.

summarization

C.

down bit

D.

route tags

Refer to the exhibit. An architect must design a solution to connect the two ASs. To
optimize bandwidth, the design will implement load sharing between router R6 and router
R4. Which solution should the design include?

A.

Use update-source to specify the Loopback interface.

B.

Use next-hop-serf attributes only for routes that are learned from eBGP peers.

C.

Configure the eBGP TTL to support eBGP multihop.

D.

Use maximum-paths to install multiple paths in the routing table.

Which method does Cisco SD-WAN use to avoid fragmentation issues?

A.

PMTUD is used.

B.

Traffic is marked with the DF bit set.

C.

Jumbo frames are enabled.

D.

Access circuits are configured with 1600 byte MTU settings.

A router running ISIS is showing high CPU and bandwidth utilization. An engineer
discovers that the router is configured as L1/L2 and has L1 and L2 neighbors. Which step optimizes the design to address the issue?

A.

Make this router a DIS for each of the interfaces

B.

Disable the default behavior of advertising the default route on the L1/L2 router

C.

Configure the router to be either L1 or L2

D.

Configure each interface as either L1 or L2 circuit ty

Drag and drop the elements from the left onto the functions they perform in the Cisco SDWAN architecture on the right.

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

Which component is part of the Cisco SD-Access overlay architecture?

A.

border node

B.

spine node

C.

leaf node

D.

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