N - Definitions

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  • N

    n-tier

    An n-tier application program is one that is distributed among three or more separate computers in a distributed network.

  • N1

    N1 is Sun Microsystems' strategy for making a network environment as easy to manage as a single machine.

  • Nagle's algorithm

    Named for its creator, John Nagle, the Nagle algorithm is used to automatically concatenate a number of small buffer messages; this process (called nagling) increases the efficiency of a network application system by decreasing the number of packets that must be sent.

  • NAK (negative acknowledgment or not acknowledged)

    NAK is an abbreviation for negative acknowledgment or not acknowledged.

  • NBAR (Network Based Application Recognition)

    Network Based Application Recognition (NBAR) is a mechanism that classifies and regulates bandwidth for network applications to ensure that available resources are utilized as efficiently as possible. Cisco Systems developed NBAR as part of its Content Networking platform for implementing intelligent network services... (Continued)

  • NBASE-T Ethernet

    NBASE-T Ethernet is an IEEE standard and Ethernet-signaling technology that allows existing twisted-pair copper cabling to exceed the cable's specified limit of 1 Gbps for distances of up to 100 meters.

  • NBMA (non-broadcast multiple access)

    NBMA (non-broadcast multiple access) is one of four network types in the OSPF (Open Shortest Path First) communications protocol.

  • near-end crosstalk (NeXT)

    Also see NeXT, a computer company that developed a personal computer with an advanced user interface and operating system.

  • Nessus

    Nessus is an open-source network vulnerability scanner that uses the Common Vulnerabilities and Exposures architecture for easy cross-linking between compliant security tools.

  • Net Neutrality

    Net neutrality is the principle that data packets on the Internet should be moved impartially, without regard to content, destination or source.

  • NetBIOS (Network Basic Input/Output System)

    NetBIOS (Network Basic Input/Output System) is a program that allows applications on different computers to communicate within a local area network (LAN).

  • NETCONF

    NETCONF is an IETF network management protocol that provides an administrator or network engineer with a secure way to configure a firewall, router, switch or other network device.

  • NetOps

    NetOps, also referred to as NetOps 2.0, is a networking approach that encompasses the use of DevOps tools, methods and techniques to create an agile, scalable and programmable infrastructure capable of delivering business-critical applications and services rapidly and efficiently.

  • NetScaler (SDX)

    Citrix NetScaler SDX is a service delivery networking platform for enterprise and cloud datacenters. NetScaler SDX supports multiple NetScaler instances on a single hardware appliance.

  • netsplit

    In using an Internet Relay Chat (IRC) network, a netsplit is the loss of contact between two IRC servers.

  • netstat

    Netstat is a common command line TCP/IP networking utility available in most versions of Windows, Linux, UNIX and other operating systems... (Continued)

  • NetWare

    NetWare, made by Novell, is a widely-installed network server operating system.

  • network access control (NAC)

    Network access control (NAC), also called network admission control, is a method of bolstering the security of a proprietary network by restricting the availability of network resources to endpoint devices that comply with a defined security policy...(Continued)

  • network access server (NAS)

    A network access server (NAS) is a computer server that enables an independent service provider (ISP) to provide connected customers with Internet access.

  • network analytics

    Network analytics is the application of big data principles and tools to the management and security of data networks.

  • network analyzer (protocol analyzer or packet analyzer)

    A network analyzer is a combination of hardware and programming, or in some cases a stand-alone hardware device, that can be installed in a computer or network to enhance protection against malicious activity... (Continued)

  • Network as a Service (NaaS)

    Network as a service (NaaS) is a business model for delivering enterprise-wide area network services virtually on a subscription basis.

  • network automation

    Network automation is a methodology in which software automatically configures, provisions, manages and tests network devices.

  • network coding

    Network coding is a method of optimizing the flow of digital data in a network by transmitting digital evidence about messages... (Continued)

  • network computer (NC)

    A network computer (NC) is a concept from Oracle and Sun Microsystems that describes a low-cost personal computer for business networks that, like the NetPC, would be configured with only essential equipment (including CD-ROM players, diskette drives or expansion slots) and managed centrally.

  • network configuration management (NCM)

    Network configuration management is the process of organizing and maintaining information about all of the components in a computer network.

  • network engineer

    A network engineer is a technology professional who has the necessary skills to plan, implement and oversee the computer networks that support in-house voice, data, video and wireless network services.

  • network fabric

    Network fabric is an industry term that describes a network topology in which devices pass data to each other through interconnecting switches.

  • network functions virtualization (NFV)

    Network functions virtualization (NFV) is an initiative to virtualize network services traditionally run on proprietary, dedicated hardware.

  • network hypervisor

    A network hypervisor is a program that provides an abstraction layer for network hardware.  Network hypervisors allow network engineers to create virtual networks that are completely decoupled and independent from the underlying physical network.

  • network intelligence (NI)

    Network Intelligence (NI) is the capacity of a network to examine data packets continuously and in real time.

  • network interface card (NIC)

    A network interface card (NIC) is a hardware component, typically a circuit board or chip, that is installed on a computer so that it can connect to a network.

  • network interface unit (NIU or Network Interface Device)

    A network interface unit (NIU) (sometimes called a network interface device) is a device that serves as a common interfacefor various other devices within a local area network (LAN), or as an interface to allow networked computers to connect to an outside network.

  • Network Job Entry (NJE)

    Network Job Entry (NJE) is an application designed for the transfer of commands, messages, programs, and jobs among different computing systems in a network.

  • Network layer

    Located at Layer 3 of the Open Systems Interconnection (OSI) communications model, the network layer's primary function is to move data into and through other networks.

  • network management system

    A network management system (NMS) is an application or set of applications that lets network engineers manage a network's independent components inside a bigger network management framework and performs several key functions.

  • network monitoring

    Network monitoring is the practice of consistently overseeing a computer network for any failures or deficiencies to ensure continued network performance.

  • network node

    A network node is an endpoint or redistribution connection point for data transmissions on a communications network that can process or forward transmissions to other nodes.

  • network operating system (NOS)

    A network operating system (NOS) is a computer operating system (OS) that is designed primarily to support workstations, personal computers and, in some instances, older terminals that are connected on a local area network (LAN).

  • network operations center (NOC)

    A network operations center (NOC) is a place from which administrators supervise, monitor and maintain a telecommunications network.

  • network orchestration

    Network orchestration is a policy-driven approach to network automation that coordinates the hardware and software components a software application or service requires to run.

  • network packet

    A packet is the unit of data that is routed between an origin and a destination on the Internet or any other packet-switched network.

  • network perimeter

    A network perimeter is the boundary between the private and locally managed-and-owned side of a network and the public and usually provider-managed side of a network.

  • network protocols

    Network protocols are sets of established rules that dictate how to format, transmit and receive data so computer network devices -- from servers and routers to endpoints -- can communicate regardless of the differences in their underlying infrastructures, designs or standards.

  • network scanning

    Network scanning is a procedure for identifying active devices on a network by employing a feature or features in the network protocol to signal devices and await a response.

  • 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.

  • network service provider (NSP)

    A network service provider (NSP) is a company that owns, operates and sells access to internet backbone infrastructure and services.

  • network tap

    A network tap is an external monitoring device that mirrors the traffic that passes between two network nodes. A tap (test access point) is a hardware device inserted at a specific point in the network to monitor data.

  • network terminator 1 (NT1)

    Using the Integrated Services Digital Network (ISDN) Basic Rate Interchange (Basic Rate Interface in ISDN) service, an NT1 (network terminating unit is a device that accepts a two-wire signal from the phone company and converts it to a four-wire signal that sends and receives to and from devices within the home or business.

  • Network Time Protocol (NTP)

    Network Time Protocol (NTP) is a protocol used to synchronize computer clock times in a network.

  • network topology

    A network topology is the arrangement of nodes -- usually switches, routers, or software switch/router features -- and connections in a network, often represented as a graph.

  • network tracking tool (network device management program)

    A network tracking tool, also called a network device management program, is a program that helps a network administrator keep track of moves, additions, and changes (known as MACs) to the hardware infrastructure of a network.

  • network traffic

    Network traffic, sometimes referred to as data traffic, is the amount of data which moves across a network during any given time.

  • Networking (computer)

    Networking, also known as computer networking, is the practice of transporting and exchanging data between nodes over a shared medium in an information system.

  • networking chip

    A networking chip is a microprocessor that provides the logic for sending and receiving data (including voice and video) on a telecommunications network so that additional devices are not needed for these functions.

  • Next Hop Resolution Protocol (NHRP)

    In a computer network, the Next Hop Resolution Protocol (NHRP) is a protocol or method that can be used so that a computer sending data to another computer can learn the most direct route (the fewest number of hops) to the receiving computer.

  • Next Steps in Signaling (NSIS)

    NSIS (Next Steps in Signaling) is an evolving communication protocol intended to facilitate signaling at the Transport layer, using a two-level model to support diverse services and resources... (Continued)

  • NFV MANO (network functions virtualization management and orchestration)

    NFV MANO (network functions virtualization management and orchestration), also called MANO, is an architectural framework for managing and orchestrating virtualized network functions (VNFs) and other software components.

  • NFVi (network functions virtualization infrastructure)

    NFVi (network functions virtualization infrastructure) encompasses all of the networking hardware and software needed to support and connect virtual network functions in carrier networks.

  • NIC handle (Network Information Center handle)

    A NIC (Network Information Center) handle is an alphanumeric character sequence that is unique for each entry in the database of all Internet domain name registrants.

  • Nicira Inc.

    Nicira is a network virtualization and SDN (software-defined networking) company that Martin Casado, Nick McKeown and Scott Shenker founded in 2007.

  • Nicira Network Virtualization Platform (Nicira NVP)

    Nicira NVP is network virtualization software that manages an abstraction layer between end systems and the physical network infrastructure and enables the creation of independently operable virtual networks.

  • NIS (Network Information System)

    NIS (Network Information System) is a network naming and administration system for smaller networks that was developed by Sun Microsystems.

  • NNTP (Network News Transfer Protocol)

    NNTP (Network News Transfer Protocol) is the predominant protocol used by computer clients and servers for managing the notes posted on Usenet newsgroups.

  • non-geographic number

    A non-geographic number, also called a virtual number, is a telephone number associated with a country, but not to any single geographic location within that country.

  • Novell Directory Services (NDS)

    Novell Directory Services (NDS) is a popular software product for managing access to computer resources and keeping track of the users of a network, such as a company's intranet, from a single point of administration.

  • NOX

    NOX is an open source development platform for C++-based software-defined networking (SDN) control applications.

  • NSFNET

    NSFNET was a network for research computing deployed in the mid-1980s that in time also became the first backbone infrastructure for the commercial public Internet.

  • nslookup

    nslookup is the name of a program that lets an Internet server administrator or any computer user enter a host name (for example, "whatis.com") and find out the corresponding IP address or domain name system (DNS) record.

  • null modem

    A null modem cable allows you to connect your PC to another nearby PC or serial device using its modem protocol.

  • Number Translation Service (NTS)

    In the U.K., Number Translation Service (NTS) is the service of routing a telephone call with a non-geographic number beginning with 07, 08, or 09 to a hidden geographic or mobile number.

  • NVGRE (Network Virtualization using Generic Routing Encapsulation)

    NVGRE (Network Virtualization using Generic Routing Encapsulation) is a network virtualization method that uses encapsulation to create large numbers of virtual LANs (VLANs) for subnets that can extend across dispersed data centers and Layers 2 and 3.

  • NWay

    NWay is a telecommunications protocol used with Ethernet networking devices (such as router and switch) to automatically negotiate the highest possible common transmission speed between two devices.

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