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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 331

You want to add 900 VLANs to the existing 90 VLANs on a data center Which two spanning-tree concerns must you consider? (Choose two )

Correct Answer: D,E
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Question 332

The network designer needs to use GLOP IP addresses to make them unique within their ASN. Which multicast address range will be considered?

Correct Answer: C
* C: GLOP addressing is defined in RFC 2770, assigning a portion of the 233.0.0.0/8 range for each AS based on their 16-bit ASN. This allows each AS to use a /24 of globally unique multicast addresses without coordination from IANA.
Other options:
* A: 239.0.0.0/8 is the administratively scoped multicast address space.
* B: 224.0.0.0/24 is reserved for local link-scoped protocols (e.g., OSPF, RIP).
* D: 232.0.0.0/8 is the Source-Specific Multicast (SSM) range.
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Question 333

A network security team uses a purpose-built tool to actively monitor the campus network, applications, and user activity. The team also analyzes enterprise telemetry data from IPFIX data records that are received from devices in the campus network. Which action can be taken based on the augmented data?

Correct Answer: C
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Question 334

Which two actions minimize the impact of the trusted NMS polling your network, such as high CPU utilization on network devices and network instability? (Choose two.)

Correct Answer: B,E
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Question 335

You are designing a large-scale DMVPN network with more than 500 spokes using EIGRP as the IGP protocol. Which design option eliminates potential tunnel down events on the spoke routers due to the holding time expiration?

Correct Answer: B
In DMVPN designs with many spokes, spokes may fail to receive periodic keepalives or routing updates if queues overflow during congestion, causing holding timers to expire and tunnels to flap. Increasing the hold queue size on the tunnel interface of the spoke routers allows them to buffer control plane packets during congestion and avoid premature tunnel teardown.
Why other options are incorrect:
* A, C, E: Physical interface queues do not directly affect tunnel protocol timers.
* D: QoS may help prioritize control plane traffic but doesn't address queue depth directly, which is the root cause of the issue.
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