layer 4-7

(redirected from L4-7)

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
References in periodicals archive ?
In those workloads, L4-7 traffic processing needs are dramatically increasing across a range of applications such as load balancing, cyber security, traffic management, VXLAN classification, user based QoE, service-aware networking and more.
and cloud platforms that enable dynamic L4-7 security and application services
OpenArchitect, the control plane management software for silicon switch fabrics, delivers comprehensive L3 routing capabilities, L4-7 filtering, plus Class-of-Service features.
We continue to extend the breadth of our L4-7 protocol coverage by supporting testing for malicious traffic such as DDoS Attacks," said Roy Chua, director of product marketing for Spirent Communications.
The E370LX replaces the E350GX as Coyote Point's intelligent, high performance L4-7 traffic load balancer targeted at mid-market applications for medium and small enterprise.