300-420 Question 100
Select 3You are designing a Cisco enterprise network to support both Power over Ethernet (PoE) and Wake-on-LAN (WoL) functionality for a new office. The network will include IP phones, security cameras, and desktop PCs. Which design considerations are MOST important to ensure proper functionality of both PoE and WoL?
- A
Ensure the switches support IEEE 802.3af/at standards for PoE and have sufficient power budget.
- B
Configure the network to use Unicast WoL packets to avoid broadcast traffic congestion.
- C
Implement VLANs to isolate WoL broadcast traffic for better network performance.
- D
Enable Energy Efficient Ethernet (EEE) on all switch ports to optimize power usage.
- E
Verify that the switches support forwarding of WoL Magic Packets while in a low-power state.
Show answer and explanation
Correct answers: A, C, E
Explanation
Designing a Cisco enterprise network to support both PoE and WoL requires ensuring that switches meet the IEEE PoE standards and have sufficient power capacity to supply connected devices. VLANs help optimize network performance by isolating broadcast traffic, which is common for WoL. Additionally, switches must support forwarding of WoL Magic Packets even when in low-power states to ensure devices can be woken reliably. These considerations ensure proper functionality and performance for both PoE and WoL in the network.
- A. Correct.
Switches must support IEEE 802.3af/at standards to provide PoE to devices like IP phones and cameras. Additionally, sufficient power budget is essential to avoid outages when powering multiple devices.
- B. Incorrect.
While Unicast WoL packets can reduce broadcast traffic, they are not mandatory for WoL functionality, and many implementations still rely on broadcast Magic Packets.
- C. Correct.
Using VLANs to isolate WoL broadcast traffic helps improve network performance by limiting the scope of broadcast domains, ensuring that WoL packets do not unnecessarily traverse the entire network.
- D. Incorrect.
Energy Efficient Ethernet (EEE) is a feature to reduce power consumption but is not directly relevant to enabling PoE or supporting WoL functionality.
- E. Correct.
Switches that support forwarding WoL Magic Packets while in a low-power state ensure that sleeping devices can still be woken up even when the switch is in energy-saving mode.