Term 541
NAT overload
NAT overload is a form of network address translation that allows many devices on a private network to share a single public IP address by using unique port numbers to track each connection.
Acronym study
Terms 541–570 of 1033 N10-009 acronyms and key terms. Each entry includes a plain-English definition and a link to the full 800-word glossary page with exam context and practice questions.
Term 541
NAT overload is a form of network address translation that allows many devices on a private network to share a single public IP address by using unique port numbers to track each connection.
Term 542
A native VLAN is the default VLAN assigned to a trunk port that carries untagged traffic for backwards compatibility with devices that do not understand VLAN tagging.
Term 543
A Native VLAN mismatch occurs when two connected switches have different Native VLANs configured on the trunk port, causing control traffic like CDP, DTP, and BPDUs to be sent on the wrong VLAN and potentially creating security vulnerabilities or connectivity issues.
Term 544
A legally binding contract that restricts the sharing of confidential information with unauthorized parties.
Term 545
NDP (Neighbor Discovery Protocol) is a key part of IPv6 that lets devices on the same network find each other and figure out how to communicate.
Term 546
Near-field Communication (NFC) is a short-range wireless technology that allows two devices to exchange data when they are touched or brought within a few centimeters of each other.
Term 547
Neighbor Discovery Protocol (NDP) is a part of IPv6 that lets devices on the same network find each other, figure out each other's addresses, and keep communication working smoothly.
Term 548
Neighbor Solicitation is an IPv6 message used by a device to request another device's link-layer address (MAC address) or to verify that a target IP address is unique on the local network.
Term 549
NetBIOS is an API and protocol suite for legacy Windows network name resolution and session management over LANs.
Term 550
NetFlow is a network protocol developed by Cisco that collects and monitors IP traffic data to provide visibility into network usage, performance, and security.
Term 551
netstat (network statistics) is a command-line tool that displays active network connections, listening ports, routing tables, and network protocol statistics on a computer.
Term 552
A Network Access Analyzer is a security tool that monitors and analyzes who and what is trying to connect to a network, checking for unauthorized access and policy violations.
Term 553
A Network ACL is a virtual firewall that controls inbound and outbound traffic at the subnet level in a cloud network, acting as a stateless packet filter.
Term 554
A network address is a unique identifier that allows devices to find and communicate with each other on a computer network.
Term 555
Network Address Translation (NAT) is a method that allows multiple devices on a local network to share a single public IP address to access the internet.
Term 556
Network Functions Virtualization (NFV) is a way to replace specialized hardware network devices with software running on standard servers to make networks more flexible and cheaper to manage.
Term 557
A Network Interface Card (NIC) is a hardware component that allows a computer or device to connect to a network and communicate with other devices.
Term 558
A Network Load Balancer is a cloud service that automatically distributes incoming network traffic across multiple servers to ensure applications remain fast, available, and secure.
Term 559
Network monitoring is the practice of continuously observing a computer network for issues like slow performance, failures, or security threats to keep it running smoothly and reliably.
Term 560
A network profile is a collection of settings that defines how a device connects to and behaves on a specific type of network, such as public, private, or domain networks.
Term 561
A Network Security Group is a set of rules that controls inbound and outbound traffic to Azure resources like virtual machines and subnets.
Term 562
Network segmentation is the practice of dividing a computer network into smaller, isolated parts to improve performance, contain security threats, and simplify management.
Term 563
Network Time Protocol (NTP) is a networking protocol that synchronizes the clocks of computers and devices over a network to a common reference time source, typically Coordinated Universal Time (UTC).
Term 564
Network topology is the physical or logical arrangement of devices, cables, and data paths in a computer network.
Term 565
NetworkManager is a software utility in Linux-based operating systems that simplifies the management of network connections by automatically handling configuration, switching, and connectivity tasks for both wired and wireless networks.
Term 566
New Technology File System (NTFS) is a modern file system developed by Microsoft that controls how data is stored, organized, and accessed on Windows-based hard drives and other storage devices.
Term 567
A next hop is the next immediate router or device that a packet is sent to on its path from source to destination.
Term 568
Near Field Communication is a short-range wireless technology that lets two devices exchange data when they are held close together, typically within a few centimeters.
Term 569
Network File System (NFS) is a protocol that allows a computer to access files over a network as if they were on its own local hard drive.
Term 570
nftables is a modern Linux kernel packet classification framework that replaces the older iptables, ip6tables, arptables, and ebtables tools for configuring network packet filtering, NAT, and firewall rules.