Layer 4 Switch
Definition - What does Layer 4 Switch mean?
A layer 4 switch enables policy based switching mechanisms that limits different traffic types and prioritizes packets based on their base application importance. A layer 4 switch is among the types of multilayer switches, and is an enhancement to the layer 3 switch that uses hardware based switching techniques.
A layer 4 switch is also known as session switch.
Techopedia explains Layer 4 Switch
A layer 4 switch is primarily responsible for the analysis and control of network traffic at layer 4 or the transport layer of OSI mode. It inspects each packet and makes forwarding and routing decisions based on layer 4-7 data.
Layer 4 switches are referred to as session switches, when they perform tasks in more or less the same manner that a firewall does, by monitoring the status of sessions individually from start to end. Similarly, a layer 4 switch when deployed on a cluster of servers, determines which server the user query should be sent to based on the server loads. It can also identify offline servers and directs traffic accordingly.
Join thousands of others with our weekly newsletter
Free Whitepaper: The Path to Hybrid Cloud:
Free E-Book: Public Cloud Guide:
Free Tool: Virtual Health Monitor:
Free 30 Day Trial – Turbonomic: