layer 4-7

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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 ?
EPICenter allows us to manage and monitor layers 4-7 so we can proactively identify potential network issues and ensure that our students and staff are not impacted," says Mr.
The Dell'Oro Group 5-Year Forecast Report offers a complete overview of the Ethernet Switch industry with tables covering manufacturers' revenue, average selling prices, and port shipments (by speed Fast Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet) for Layers 2-3 (both managed and unmanaged), and Layers 4-7.
The Dell'Oro Group Ethernet Switch Quarterly Report offers complete, in-depth coverage of the market with tables covering manufacturers' revenue, average selling prices, and port shipments (by speed Fast Ethernet, Gigabit Ethernet, 10 Gigabit Ethernet) for Layers 2/3 (both managed and unmanaged), Layers 4-7, Power-over-Ethernet (ports only), and Gigabit NICs and LOMs (units only).
with Opportunity to Conduct Comprehensive Layers 4-7 Testing
Nasdaq: LIOX), to deliver comprehensive testing of Layers 4-7 under real-world conditions.
Optixia and the development of the Dual-PHY(TM) technology of the OLM1000STXS24 Load Module provide the industry with a comprehensive, cost-effective solution for testing not only layer 2-3 traffic, but simultaneously testing layers 4-7 while fully integrating Ixia's Real World Traffic(TM) Suite, all at Gigabit Ethernet wire-speed.
Avalanche AfterBurner technology highlights Spirent's continuing series of innovations in the Layers 4-7 space and offers the industry an effective method for performance testing extremely high-end firewalls, server load balancers (SLBs) and large scale infrastructures built from clusters of high-end equipment.
This is a demonstration of a technology that proves Spirent's continuing leadership in the Layers 4-7 security and web infrastructure space," said Andrew Foss, president of Spirent Communications' Northern California Performance Analysis -- Broadband operations.