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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 166

Which two features control multicast traffic in a VLAN environment? (Choose two)

Correct Answer: A,B
* A (IGMP Snooping): Controls IPv4 multicast traffic within VLANs by listening to IGMP join/leave messages and forwarding multicast only to interested ports.
* B (MLD Snooping): Performs similar multicast control for IPv6 multicast traffic by listening to MLD protocol messages.
* Both technologies reduce unnecessary multicast flooding inside VLANs.
Why other options are incorrect:
* C (RGMP): Controls multicast on router-connected ports, not intra-VLAN.
* D (PIM Snooping): Operates on PIM-enabled Layer 3 devices; less relevant for pure VLAN-based Layer 2 multicast control.
* E (Pruning): Refers to multicast tree pruning in Layer 3 multicast routing, not VLAN Layer 2 control.
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Question 167

Refer to the exhibit.

A new high availability DB sever cluster is installed in the network.
These two servers require high bandwidth and low latency Layer 2 connectivity for database replication.
Which solution supports these requirements?

Correct Answer: A
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Question 168

A BGP route reflector in the network is taking longer than expected to coverage during large network changes. Troubleshooting shows that the router cannot handle all the TCP acknowledgements during route updates. Which action can be performed to tune the device performance?

Correct Answer: B
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Question 169

Which two types of planning approaches are used to develop business-driven network designs and to facilitate the design decisions? (Choose two)

Correct Answer: B,D
* B (Strategic planning): Long-term business-aligned decisions that shape future infrastructure needs.
* D (Tactical planning): Short-to-mid-term activities that adjust design based on evolving operational realities, constraints, and priorities.
Why other options are incorrect:
* A & E: While cost and business optimization are goals, they are not defined planning approaches.
* C: Modular is a design methodology, not a planning approach.
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Question 170

Which two mechanisms avoid suboptimal routing in a network with dynamic mutual redistribution between multiple OSPFv2 and EIGRP boundaries? (Choose two.)

Correct Answer: D,E
https://www.cisco.com/c/en/us/support/docs/ip/enhanced-interior-gateway-routing-protocol-eigrp/8606-redist.
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