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Designing Cisco Enterprise Networks (ENSLD) Questions 121–125 (page: 26)

Updated On: 10-Feb-2026



Refer to the exhibit. An engineer with an employee ID: 1234:56:789 must design a WoL deployment for a client, and the design must ensure that the Windows PCs are responsive to the WoL magic packets with no delays when the server-side initiates the instruction. Which action must the engineer choose?

  1. IP-directed broadcast must be disabled on all interfaces where clients reside.
  2. WoL must be enabled on the networking card and disabled in the Windows PCs BIOS.
  3. Spanning-tree PortFast must be enabled on all interfaces where clients reside.
  4. IP forward protocol must be disabled on all interfaces where clients reside.

Answer(s): C

Explanation:

In a Wake-on-LAN (WoL) deployment, enabling Spanning-tree PortFast on the interfaces connected to the Windows PCs ensures that these ports transition immediately to the forwarding state, bypassing the traditional Spanning Tree Protocol (STP) listening and learning states. This reduces delays and ensures that the magic packet required to wake up the PCs is delivered without interruption. Without PortFast, ports could experience delays in becoming active, which might hinder the timely receipt of the WoL magic packets.





Refer to the exhibit. A customer requires a Layer 2 network designed to support:

500 active logical ports
trunking of 30 VLANs


convergence of less than 1 second


Which Spanning Tree Protocol must be selected?

  1. PVST+
  2. CST
  3. RPVST+
  4. MSTP

Answer(s): C

Explanation:

Rapid Per-VLAN Spanning Tree Protocol Plus (RPVST+) is the best choice for this design because it meets the customer's requirements:
It provides rapid convergence of less than 1 second, which aligns with the requirement for fast recovery.


It supports trunking with multiple VLANs, as RPVST+ runs a separate spanning tree instance for each VLAN, providing optimal traffic paths for each VLAN.
It scales well with 500 active logical ports.
RPVST+ is specifically designed for environments that need rapid failover and high performance in Layer 2 networks with multiple VLANs.



Which two considerations must be made regarding the overlay network for a Cisco SD-Access architecture? (Choose two.)

  1. Virtual networks should be used for microsegmentation.
  2. Overlapping IP addresses across different overlay networks should be used to conserve IP addresses. C.
    Overlapping IP addresses across different overlay networks should be avoided for operational simplicity. D.
    SGTs should be used for data plane isolation and microsegmentation.
  3. Virtual networks should be used for data plane isolation only.

Answer(s): A,C

Explanation:

Virtual networks (VNs) are used to achieve microsegmentation, allowing for logical separation of traffic and ensuring better security and scalability.
Overlapping IP addresses across different overlay networks should be avoided because they can complicate troubleshooting, routing, and network management. Operational simplicity is achieved by using unique IP address spaces for each overlay network to ensure clarity and efficiency.



A large chain of stores currently uses MPLS-based T1 lines to connect their stores to their data center. An architect must design a new solution to improve availability and reduce costs while keeping these considerations in mind:

The company uses multicast to deliver training to the stores. The company uses dynamic routing protocols and has implemented QoS.


To simplify deployments, tunnels should be created dynamically on the hub when additional stores open.


Which solution should be included in this design?

  1. VPLS
  2. GET VPN
  3. DMVPN
  4. IPsec

Answer(s): C



A network engineer must connect two sites across a public network using a secure tunneling technology that supports multicast traffic. Which technology should be selected?

  1. IPsec
  2. GRE
  3. PPTP
  4. GRE over IPsec

Answer(s): D



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