Building Cisco Service Provider Next-Generation Networks Part 1 (SPNGN1)

Here you have the best Cisco 640-875 practice exam questions

You have 186 total questions to study from
Each page has 5 questions, making a total of 38 pages
You can navigate through the pages using the buttons at the bottom
This questions were last updated on October 16, 2025
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Question 1 of 186

The PE and CE interfaces are in the UP/UP state. The junior Network Engineer has validated Layer 3 functionality by pinging the adjacent interface, however the customer is unable to access the provider network. What should be your next troubleshooting step?

Validate that the encapsulation method is utilizing Point-to-Point Protocol

Validate that the destination customer network is in the correct VRF

Validate that the circuit clocking is inaccurate and needs to be synchronized on both sides

Check the physical connection between both devices to ensure stability

Identify incorrect RADIUS configuration is present on the PE device

Check that an access-list is mis-configured on the loopback 0 interface and needs to be corrected

Correct Answer: B

Question 2 of 186

What are two differences between WAN and LAN? (Choose two.)

The customer has explicit control of their own WAN.

The customer can modify the service provider route distinguishers.

The customer has explicit control of their LAN.

The customer is aware of the infrastructure within the WAN.

WANs will differ from LANs with attributes such as latency and distance.

Correct Answer: C, E

Question 3 of 186

Which of the following correctly pairs the dotted decimal subnet mask with the correct number of binary bits that represent the subnet mask?

255.255.255.192 and /25

255.255.255.248 and /28

255.255.255.224 and /26

255.255.255.248 and /27

255.255.255.240 and /28

255.255.255.240 and /16

Correct Answer: E

Question 4 of 186

What are two benefits of a star network topology? (Choose two.)

Disruption of the entire network is not required when adding new machines.

Any problem which leaves the network inoperable can be traced to the central hub.

This network type requires less cable as compared to linear bus topology.

The performance of one of the numerous nodes cannot reflect on the performance of other nodes.

The performance of the entire network is directly dependent on the performance of the hub.

Correct Answer: A, B

Question 5 of 186

DRAG DROP -
Drag the network device functions or features from the left and drop them on the correct network devices on the right.
Select and Place:
Exam 640-875: Question 5 - Image 1

Correct Answer: