Free Practice Cisco 400-007 Exam Questions 2025

Stay ahead with 100% Free Cisco Certified Design Expert CCDE v3.1 400-007 Dumps Practice Questions

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Total 578 Questions | Updated On: Mar 08, 2025

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Question 1

Which layer of the SDN architecture orchestrates how the applications are given the resources available in the network?

A : southbound API

B : northbound API

C : orchestration layer

D : control layer

Answer: D

Question 2

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 )

A : STP is increased by a factor of 10 convergence time

B : To add 990 VLANs to the switching hardware reserved VLANs requires you to use extended VLAN

C : The diameter of the STP topology is increased.

D : The PVST+ increases CPU utilization

E : BPDU does not support 990 VLANs

Answer: C,D

Question 3

A large service provider network has a single-level IS-IS network with 500 routers. This network has short-haul and long-haul links. Periodically, long-haul links bounce for a short period of time, causing 10 to 20 flaps in a few minutes. The probable cause is local road construction. Although fast convergence is important, a design engineer is concerned about taxing CPU cycles on the older routers. Which solution protects the CPU of the older routers during the short periods of excessive flapping, yet has no impact on fast convergence for all interface failures?

A : Modify the length of time that an LSP remains in the router database without being refreshed on all routers

B : Modify hello timers on routers with short-haul links

C : Implement a delay between successive IS-IS LSP packet transmissions on routers with long-haul links

D : Implement LSP generation throttling on routers with long-haul links

Answer: C

Question 4

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?

A : Increase the size of the hold queue.

B : Increase the size of the large buffers.

C : Decrease the size of the small buffers.

D : Increase the keepalive timers for each BGP neighbor.

Answer: A

Question 5

Network designers often segment networks by creating modules for various reasons Sometimes however a network can be unintentionally segmented For instance, if the only way to connect a remote site to a headquarters or regional site is to connect them both to the public Internet the corporate network is now unintentionally segmented Which of the following option can be used to desegment the network in this situation?

A : Build virtual networks that pass over the network

B : Mark traffic for special handling through quality of service

C : Configure little to no control data plane policy

D : Block specific sources from reaching specific destinations

Answer: A

Page: 1 / 116

Total 578 Questions | Updated On: Mar 08, 2025

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