# Overview of L4 LB #flashcard Load balancers that make decisions using [[Layer 4 - Transport]] information, like IP addresses and ports (i.e., they do not look at the actual content of the packets). Key characteristics of L4 load balancers: - Maintain persistent TCP connections between client and server. - Fast and efficient due to minimal packet inspection. - Cannot make routing decisions based on application data. - Typically used when raw performance is the priority. <!--ID: 1751507776470--> # Key Considerations # Pros # Cons # Use Cases - [[WebSockets]] # Related Topics - [[AWS Network Load Balancer]]