layer 4-7


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Related to layer 4-7: Layer 5

layer 4-7

The two layers in a network packet that identify its content (for details about layers, see TCP/IP and OSI model). The bottom layers 1, 2 and 3 are the protocols that move a network packet from source to destination. Layers 4 and 7 identify the application that created the packets as well as the specifics of the request. For example, inspecting layer 4 can identify HTTP traffic (Web traffic), but inspecting layer 7 can determine what the HTTP request is for (see Web switch). See layer 4 switch and well-known port.


TCP/IP SWITCHING/ROUTING DECISIONSLayer and      ForwardingProtocol       DecisionInspected      Based on

  2 - Ethernet   MAC address

  3 - IP         Network address
  3 - IP         Service quality

  4 - TCP/UDP    Traffic type
      socket     (HTTP, FTP, etc.)

  7 - HTTP       HTTP request type
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References in periodicals archive ?
Layer 4-7 visibility can pick up on the application the customer is using and insert packets, for example.
Based on the ArrayOS, the Array TM series integrates essential networking features into one powerful platform, including Layer 4-7 Server Load Balancing, Caching, Link Load Balancing, SSL Acceleration, Compression, Clustering, Webwall for Web security and Global Server Load Balancing.
In addition, Dacom has deployed Foundry's ServerIron Layer 4-7 Web switches providing transparent cache switching functionality.
Used in tandem, the units simulate large customer environments and have advanced Layer 4-7 features, including high-performance control and reporting, real-world error injection--including dropped packets, multiple link speeds and accurate support for all major protocols.
The Nauticus family of intelligent data center switches enables high-performance network and security services in the data center, including SSL processing, layer 4-7 application switching, and load balancing.
Foundry will supply its BigIron 8000 and BigIron 15000 Layer 3 backbone switches to the university and then replace legacy network switches with Foundry ServerIron Layer 4-7 switches.
Foundry Networks, a provider of high performance end-to-end switching and routing solutions, has unveiled new high end products in each of its major product lines: the NetIron 1500 Internet backbone router, the BigIron 15000 Layer 2/3 switch and switching router, and the ServerIron 400 and ServerIron800 Layer 4-7 Internet Traffic Management switches.
The switches integrate high-performance network and security application services, such as attack protection, denial-of-service mitigation and advanced URL-and application-level filtering, with load balancing, Layer 4-7 application switching and SSL acceleration.
1 provider of SSL (Secure Sockets Layer) acceleration products, in the Layer 4-7 Switch/Load Balancer with SSL category.