Term 661
MTBF
MTBF (Mean Time Between Failures) is a reliability metric that estimates the average operational time between inherent failures of a hardware component or system during normal operation.
Acronym study
Terms 661–690 of 1222 SK0-005 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 661
MTBF (Mean Time Between Failures) is a reliability metric that estimates the average operational time between inherent failures of a hardware component or system during normal operation.
Term 662
MTBF predicts average operational time between inherent failures of a device, used to estimate reliability in networking hardware.
Term 663
MTTR stands for Mean Time to Repair, a metric that measures the average time it takes to restore a failed system or component to full working order after a failure occurs.
Term 664
Multi-AZ refers to a deployment model where resources are replicated across multiple Availability Zones within a cloud region to ensure high availability and fault tolerance.
Term 665
Multi-cloud security is the practice of protecting data, applications, and infrastructure across two or more cloud service providers using unified policies and tools.
Term 666
Multilevel security is a computer security approach that allows users with different clearance levels to access data at different classification levels on the same system, while preventing unauthorized access.
Term 667
An MX (Mail Exchange) record is a DNS resource record that specifies which mail servers are responsible for accepting email messages on behalf of a domain.
Term 668
NaaS is a cloud delivery model where network infrastructure and services are provided on-demand via a subscription, eliminating the need for on-premises hardware.
Term 669
Network Access Control (NAC) is a security technology that enforces policies to control which devices and users can connect to a network.
Term 670
A Network Access Control List (NACL) is a stateless firewall that controls inbound and outbound traffic at the subnet level in a virtual private cloud.
Term 671
A name server is a specialized server that translates human-readable domain names into machine-readable IP addresses so that computers can find each other on a network.
Term 672
A Named ACL is a list of rules applied to a network device, identified by a name instead of a number, that controls which traffic is allowed or blocked based on source and destination IP addresses, protocols, and port numbers.
Term 673
NAS is a dedicated file-level storage device connected to a network, providing centralized data access to multiple clients via standard protocols like NFS or SMB.
Term 674
NAS is a dedicated file-level storage device connected to a network, providing centralized data access to multiple clients.
Term 675
A NAT instance is a virtual machine that forwards traffic from a private subnet to the internet, performing Network Address Translation (NAT) so that private instances can reach the internet without exposing them to inbound connections.
Term 676
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 677
A legally binding contract that restricts the sharing of confidential information with unauthorized parties.
Term 678
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 679
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 680
Nessus is a vulnerability scanner that automatically identifies security weaknesses, missing patches, and misconfigurations in computer systems and networks.
Term 681
NetBIOS is an API and protocol suite for legacy Windows network name resolution and session management over LANs.
Term 682
NetBIOS Enumeration is the process of gathering information from a Windows system using the NetBIOS protocol to discover shares, users, and system details over a network.
Term 683
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 684
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 685
Network Access Control is a security solution that enforces policies to control which devices and users can connect to a network, ensuring only authorized and compliant endpoints gain access.
Term 686
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 687
A network address is a unique identifier that allows devices to find and communicate with each other on a computer network.
Term 688
Network as a Service (NaaS) is a cloud-based model where you rent networking capabilities like routers, firewalls, and bandwidth from a provider instead of buying and managing the hardware yourself.
Term 689
Network Connectivity Troubleshooting is the systematic process of identifying and resolving problems that prevent devices from communicating with each other over a network.
Term 690
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.