400-007 Free Practice Test

A company plans to use BFD between its routers to detect a connectivity problem inside the switched network. An IPS is transparently installed between the switches. Which packets shold the IPS forward for BFD to work under all circumstances?

1. A. Fragmented packet with the do-not-fragment bit set
2. B. IP packets with broadcast IP source addresses
3. C. IP packets with the multicast IP source address
4. D. IP packet with the multicast IP destination address
5. E. IP packets with identical source and destination IP addresses
6. F. IP packets with the destination IP address 0.0.0.0.

Correct Answer: E

Company XYZ needs advice in redesigning their legacy Layer 2 infrastructure. Which technology should be included in the design to minimize or avoid convergence delays due to STP or FHRP and provide a loop-free topology?

1. A. Use switch clustering in the access layer.
2. B. Use switch clustering in the core/distribution layer.
3. C. Use spanning-tree PortFast.
4. D. Use BFD.

Correct Answer: B

Sometimes SDN leverages various overlay networking technologies to create layer(s) of network abstraction. What describes an overlay network?

1. A. It transmits packets that traverse over network devices like switches and routers
2. B. It encapsulates packets at source and destination, which incurs additional overhead
3. C. Packet delivery and reliability occurs at Layer 3 and Layer 4
4. D. It is responsible for the delivery of packets; NAT- or VRF-based segregation is required

Correct Answer: B

While reviewing an existing network design, you are discussing the characteristics of different STP versions. Which protocol minimizes unicast flooding during a Topology Change Notification in a Layer 2 switched network with many VLANs?

1. A. PVRSTP
2. B. MST
3. C. STP
4. D. PVSTP+

Correct Answer: A

An enterprise organization currently provides WAN connectivity to their branch sites using MPLS technology, and the enterprise network team is considering rolling out SD-WAN services for all sites.
With regards to the deployment planning, drag and drop the actions from the left onto the corresponding steps on the right.

Solution:
Table Description automatically generated with medium confidence

Does this meet the goal?

1. A. Yes
2. B. No

Correct Answer: A