Balancing Security and Performance in PoE Smart Buildings

Smart building technology integrates and optimizes automated processes, Internet of Things (IoT) devices, and artificial intelligence (AI) to enhance operational performance, security, energy efficiency, and the occupant experience. It extends beyond passive data collection to dynamic data exchange, enabling the intelligent automation of the building environment.

IoT devices are strategically positioned throughout a smart building to collect operational data on critical systems, including lighting, heating, and cooling. Centralized data analysis provides real-time insights that drive AI-enabled solutions, leading to enhanced performance and efficiency. But as more IoT devices move to the edge of the network, the attack surface expands dramatically. 

Protecting the network’s edge can impact performance, as it increases resource utilization due to enhanced scanning processes and real-time responses. Balancing the security needs of the infrastructure with operational performance is a crucial challenge. Using power over Ethernet (PoE) technology can help meet that challenge by creating PoE smart buildings.

Endpoint Security in PoE Smart Buildings

In 2025, hackers leveraged poor security hygiene at the edge, resulting in an 800% increase in attacks on virtual private networks (VPNs) or edge devices. From a 3% exploitation rate in 2024, edge vulnerabilities reached 20% of all attacks in 2025. Some notable examples include:

• The Federal Trade Commission fined Ring $5.8 million for failing to implement adequate security measures to prevent attacks that compromised approximately 55,000 US customer accounts.
• Attackers exploited a smart fish tank thermometer at a Las Vegas casino to access high-dollar customer accounts.
• Nation-state hackers such as Iranian-affiliated CyberAv3ngers launched cyberattacks against industrial control systems, targeting devices from the Israeli firm Unitronics. The attacks disrupted water services and infiltrated oil and gas systems in the US and Ireland.

Edge security cannot be ignored. Deploying a PoE managed switch, such as Versa’s C60-244-30-600U, can enhance edge security without compromising performance.

How PoE Managed Switches Strengthen Smart Building Cybersecurity

Here are five core managed-switch features that help achieve the critical balance between performance and security.

1. Port Security and MAC Address Binding

Unsecured ports are one of the most common entry points for rogue devices. Organizations can place PoE switches between edge devices and a network to offload resource demands. Managed switches can handle administrative tasks that may cause performance delays and provide security features to mitigate man-in-the-middle attacks, as well as reduce the insertion of rogue devices.

Using a device’s MAC address, a switch can associate a device with a specific port, ensuring that data only flows from authorized devices. Every device has an embedded MAC address that uniquely identifies it during communications. A PoE-managed switch can also negotiate power using MAC addresses to facilitate rapid recovery after a disruption.

2. VLAN Segmentation and Tagging

Smart buildings often run hundreds of IoT devices simultaneously. Virtual local area networks allow multiple virtual networks to share traffic over a single Ethernet cable. Without segmentation, a single compromised device can allow lateral network movement. 

A four-byte identifier or tag is inserted into an Ethernet frame to indicate the virtual network receiving or sending data. This segmentation helps isolate traffic, preventing lateral movement risks during cyber attacks on smart buildings. 

PoE switches that support Quality of Service (QoS) technologies enable network administrators to prioritize traffic, ensuring that time-critical data is delivered without latency issues. Through VLAN tagging and QoS features, PoE-managed switches help reduce the network resources used for scanning and interrogating incoming traffic, providing consistent performance for smart buildings.

3. Access Control Lists (ACLs) and Rate Limiting

Rule-based filtering is a staple of network security and management. Firewalls have rules, so do routers and switches. ACLs help enforce rule-based policies at the switch level, filtering traffic before it can reach internal systems. Depending on the switch, access can be controlled at the device or port level.  Setting power and data caps on PoE-enabled ports further restricts access, preventing DDoS attacks that flood a network with malicious traffic.

Limit setting also helps maintain a consistent bandwidth across an enterprise, avoiding bottlenecks or fluctuations in availability. Tying access control lists (ACLs) to PoE protocols can automate processes that would otherwise delay operations if handled manually.

4. Port-Based Authentication 

A PoE-managed switch can require device authentication before granting access or delivering power. Combined with other solutions, endpoint verification can prevent spoofing and enable certificate-based encryption, providing profiled security for devices such as sensors, lights, and cameras in a smart building.

Configurable solutions allow MAC-based authentication for less complex or legacy devices to coexist with other security measures in hybrid environments, reducing the number of false positives that could result in shutdowns.

5. Advanced Threat Detection

Switches can classify ports as trusted or untrusted. Designating a port connected to a DHCP server as trusted means DHCP server-related messages can be accepted through the port. PoE-enabled switches filter DHCP traffic to prevent unauthorized servers from responding to client requests. They can also validate ARP requests to prevent IP or MAC spoofing. PoE switches can also monitor power usage that might indicate possible tampering. Logging events without inspection overhead can reduce possible latency. The logs can also be used with security information and event management (SIEM) tools to provide building managers with critical data for analysis.

Implementing a Secure, High-Performance PoE Smart Building

Balancing security and performance in a smart building never ends. Cybercriminals are becoming increasingly sophisticated, and technological advances are demanding more robust infrastructures, making scalability an essential component of any plan. Government and industry standards continually evolve to meet a changing landscape, requiring smart buildings to reassess their compliance.

PoE switches have the flexibility to support the latest PoE standards while maintaining backward compatibility with legacy devices. They can scale as buildings move from a hybrid environment. Switches, such as the C60-244-30-600U, feature a built-in battery backup system that ensures uninterrupted PoE output during power outages, eliminating the risks associated with shared uninterruptible power solutions (UPS). 

With PoE technology, fewer wires are required to maintain operations, as power and data are transmitted over a single Ethernet cable. Switches often offer topology views of devices, including power consumption and alerts for faster troubleshooting. 

Implementing PoE technology in smart buildings requires careful testing to ensure performance while delivering strong security defenses. It involves mapping installations to recognized standards, such as ISO 27001 and NIST SP 800-82, and demands a commitment to continuous improvement through data collection and analysis.

Why Versa Technology Is the Right Partner to Implement Secure PoE Smart Buildings 

Versa Technology’s commitment to PoE technology is shown in its C60-244-30-600U PoE managed switch. The uninterruptible 24-port 10/10/1000 PoE switch delivers continuous operations with its built-in battery backup capabilities, offering reliable operation for critical facilities. Its security features protect smart buildings against cyber disruptions, effectively balancing performance and security. If you’re looking to balance performance and security, contact us to receive a customized quote.