What impact does the public network firewall have on network performance?

The public network firewall can have both positive and negative impacts on network performance.

Positive Impacts:

1. Enhanced Security: Firewalls filter malicious traffic, reducing the risk of cyberattacks, which indirectly improves network stability.
2. Traffic Control: By blocking unnecessary connections, firewalls optimize bandwidth usage for legitimate traffic.

Negative Impacts:

1. Latency Increase: Deep packet inspection (DPI) and rule-based filtering can introduce processing delays, slowing down data transmission.
2. Throughput Reduction: High firewall rules complexity or insufficient hardware resources may limit the network's data transfer capacity.

Example:
A company uses a public network firewall to block DDoS attacks. While this protects its servers, the firewall's DPI feature may cause a 10-20ms latency increase for real-time applications like video conferencing.

For scenarios requiring high-speed and secure public network access, Tencent Cloud's Anti-DDoS Pro and Lightweight Anti-DDoS services provide efficient threat mitigation with minimal performance impact. These services integrate advanced firewall capabilities while optimizing traffic forwarding to maintain low latency.