Network Addressable Unit (NAU)

Definition - What does Network Addressable Unit (NAU) mean?

A network addressable unit (NAU) is a Systems Network Architecture (SNA) component from IBM that could be referenced by the name and address, including the system services control point (SSCP), logical units (LU), and physical units (PU). An NAU in an SNA network is a component that can be allocated an address and can also send and receive information.

Techopedia explains Network Addressable Unit (NAU)

SNA describes three significant network addressable units: LUs, PUs and CPs. Each one plays a vital role in setting up connections among systems in an SNA network. These are further explained as follows:

  • System services control points: SSCPs offer services for handling a network or a subnetwork (usually in a mainframe). Control points (CPs) control SNA nodes in addition to their resources. Generally, CPs are differentiated from PUs for the reason that CPs decide which actions have to be taken, whereas PUs induce actions to take place.

    The SSCP of the SNA is a good example of a CP. An SSCP could be the CP located in a PU 5 node or an SSCP as employed according to an SNA access technique, like the Virtual Telecommunications Access Method (VTAM).

  • Logical units: LUs are a logical set of services that can be accessed from a network. LUs work as end-user access ports in an SNA network. With LUs, users can access the network resources. LUs also control the data transmission between the end users.

  • Physical units: PUs are a mix of software and hardware that handle the links to other nodes. PUs are used to control and keep track of connected network links as well as other network resources related to a specific node. SNA access techniques, like the VTAM, are used to implement PUs on hosts. Moreover, network control programs can be used to implement PUs within communications controllers.
Share this:

Connect with us

Email Newsletter

Join thousands of others with our weekly newsletter

The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.