The OSI Model

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  • OSI: Securing the stack, Layer 1 -- Physical security threats

    Security expert Michael Gregg kicks off his layer-by-layer discussion of OSI model network security with this tip on securing Layer 1 against physical security threats.  Tip

  • FTAM (File Transfer Access Method)

    File Transfer Access Method (FTAM), also known as File Transfer Access and Management or Electronic File Transfer Access Method (EFTAM), is an ISO standard that specifies methods of transfering files between networked computers... (Continued)  Definition

  • Application layer

    In the Open Systems Interconnection (OSI) communications model, the application layer provides services for an application program to ensure that effective communication with another application program in a network is possible.  Definition

  • Logical Link Control layer (LCL layer)

    The Logical Link Control (LCL) layer is one of two sublayers of the Data-Link layer in the Open Systems Interconnection (OSI) model of communication. The LCL layer is concerned with managing traffic (flow and error control) over the physical medium....  Definition

  • OSI: Securing the Stack, Layer 5 -- session hijacking

    To help secure your systems against session hijacking, this tip walks you through the steps hackers use to hijack active sessions and take over your network. You'll also learn how to detect and prevent session hijacking attacks, a major security conc...  Tip

  • OSI model: Crash Course

    The OSI model is the conceptual backbone of most enterprise networks, but do you remember all the details? Read our rundown of the OSI model and what all those layers do.  Crash Course

  • FastFacts on the OSI model

    These resources will help you better understand the OSI model and all those layers in a snap.  Networking FastFacts

  • Media Access Control layer (MAC layer)

    In the Open Systems Interconnection (OSI) model of communication, the Media Access Control layer is one of two sublayers of the Data Link Control layer and is concerned with sharing the physical connection to the network among several computers.  Definition

  • Transport Services Access Point (TSAP)

    A Transport Services Access Point (TSAP) is an end-point for communication between the Transport layer (layer 4) and the Session layer in the OSI (Open Systems Interconnection) reference model.  Definition

  • Network Service Access Point (NSAP)

    The Network Service Access Point (NSAP) is one of two types of hierarchical addresses (the other type is the network entity title) used to implement Open Systems Interconnection (OSI) network layer addressing.  Definition

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