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  1. Home
  2. Cisco Certification
  3. 400-007 Exam
  4. Cisco.400-007.v2025-12-06.q401 Dumps
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Question 121

During IPv6 deployment in a legacy network, what must be considered for older Layer 2 switches? (Choose two)

Correct Answer: C,D
#Explanation:
* C: IPv6 functions at Layer 3, and Layer 2 switches (which do not inspect or modify Layer 3 headers) typically forward IPv6 frames transparently just like IPv4-unless enhanced services are needed.
* D: For efficient IPv6 multicast handling (e.g., neighbor discovery, multicast services), switches should support MLD snooping (equivalent to IGMP snooping for IPv4).
Incorrect options:
* A, B, E: DHCPv6 snooping, ND snooping, and ICMPv6 snooping are not standard or widely implemented features in Layer 2 devices. They're also unnecessary for basic IPv6 forwarding.
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Question 122

A healthcare provider discovers that protected health information of patients was altered without patient consent. The healthcare provider is subject to HIPAA compliance and is required to protect PHI data. Which type of security safeguard should be implemented to resolve this issue?

Correct Answer: A
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Question 123

In an OSPF network with routers connected together with Ethernet cabling, which topology typically takes the longest to converge?

Correct Answer: C
In OSPF, a ring topology typically converges more slowly because:
* Link failures can create longer SPF recalculations as alternate paths are fewer.
* Only one alternate path usually exists for each link failure, extending the time needed for failure detection and SPF recalculation.
CCDE v3.1 stresses that designs like full mesh or triangulated topologies provide faster convergence due to multiple available alternate paths, which reduce SPF computation complexity.
Why other options are incorrect:
* A, D, E: These topologies provide multiple paths.
* B: Full mesh offers immediate redundancy for any failure.
-
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Question 124

Which protocol does an SD-Access wireless Access Point use for its fabric data plane?

Correct Answer: C
In Cisco SD-Access architecture, fabric-enabled wireless APs connect to the network usingCAPWAPfor control, but their data plane is integrated into thefabric overlayusingVXLAN (Virtual Extensible LAN).
* VXLANis the data plane encapsulation used between fabric nodes, including wireless APs that are part of the SD-Access fabric.
* WhileCAPWAP (E)remains in use for management and control communication between the AP and wireless LAN controller (WLC), actual user traffic is encapsulated in VXLAN for fabric forwarding.
This separation of control and data plane ensures seamless mobility, segmentation, and policy enforcement within the SD-Access fabric.
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Question 125

Your company utilizes many different types of network transports and you want to increase the efficiency of the network Which solution can be used to improve network efficiency over PPPoE IPsec, and GRE networks'?

Correct Answer: B
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