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Security+ SY0-701/Acronyms/Part 11

Acronym study

SY0-701 Acronyms — Part 11 of 21

Terms 301–330 of 610 SY0-701 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.

← Part 10Part 11 of 21Part 12 →

Term 301

Meeting policy

A meeting policy is a set of rules and configurations that control how online meetings are created, joined, and conducted within a collaboration platform.

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Full Meeting policy glossary entry →

Term 302

Memorandum of Understanding

A Memorandum of Understanding (MOU) is a formal document that outlines the general terms and intentions of an agreement between two or more parties before a legally binding contract is signed.

Full entry →
Full Memorandum of Understanding glossary entry →

Term 303

Messaging policy

A messaging policy is a set of rules that govern how an organization's email and instant messaging systems handle, route, secure, and retain messages to ensure compliance, security, and operational efficiency.

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Full Messaging policy glossary entry →

Term 304

Metro Ethernet

Metro Ethernet is a service that extends Ethernet networking across a metropolitan area, allowing businesses to connect multiple locations as if they were on the same local network.

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Full Metro Ethernet glossary entry →

Term 305

MFA

Multi-Factor Authentication (MFA) is a security method that requires a user to verify their identity using two or more different types of evidence, such as a password plus a code from a phone, before they can access an account or system.

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Full MFA glossary entry →

Term 306

Microsegmentation

Microsegmentation is a network security technique that divides a data center or cloud environment into small, isolated segments to control traffic between workloads, reducing the attack surface.

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Full Microsegmentation glossary entry →

Term 307

Microsoft Defender XDR

Microsoft Defender XDR is a unified security platform that automatically correlates alerts from across an organization's endpoints, email, identities, and cloud apps to stop complex attacks.

Full entry →
Full Microsoft Defender XDR glossary entry →

Term 308

Mobile device management

Mobile device management (MDM) is a security solution that allows IT administrators to enroll, configure, monitor, and enforce policies on smartphones, tablets, and other mobile devices used in an organization.

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Full Mobile device management glossary entry →

Term 309

MOU

A Memorandum of Understanding (MOU) is a non-binding agreement between parties outlining mutual goals and intentions for cooperation.

Full entry →
Full MOU glossary entry →

Term 310

mTLS

mTLS (mutual Transport Layer Security) is a security protocol where both the client and the server authenticate each other using digital certificates before exchanging data.

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Full mTLS glossary entry →

Term 311

Multifactor Authentication

Multifactor Authentication (MFA) is a security method that requires you to provide two or more pieces of evidence to prove your identity before accessing an account or system.

Full entry →
Full Multifactor Authentication glossary entry →

Term 312

Multilevel security

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.

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Full Multilevel security glossary entry →

Term 313

NAC

Network Access Control (NAC) is a security technology that enforces policies to control which devices and users can connect to a network.

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Full NAC glossary entry →

Term 314

Named ACL

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.

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Full Named ACL glossary entry →

Term 315

NAT

NAT (Network Address Translation) is a method that allows multiple devices on a private network to share a single public IP address when accessing the internet.

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Full NAT glossary entry →

Term 316

NAT Gateway

A NAT Gateway is a managed AWS service that allows instances in a private subnet to connect to the internet or other AWS services while preventing the internet from initiating connections back to those instances.

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Full NAT Gateway glossary entry →

Term 317

NAT instance

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.

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Full NAT instance glossary entry →

Term 318

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.

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Term 319

Native VLAN

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.

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Term 320

Native VLAN mismatch

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.

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Full Native VLAN mismatch glossary entry →

Term 321

NDA

A legally binding contract that restricts the sharing of confidential information with unauthorized parties.

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Full NDA glossary entry →

Term 322

Need to know

Need to know is a security principle that restricts access to information or resources only to individuals who require that access to perform their job duties.

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Full Need to know glossary entry →

Term 323

Network Access Control

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.

Full entry →
Full Network Access Control glossary entry →

Term 324

Network ACL

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.

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Full Network ACL glossary entry →

Term 325

Network security

Network security is the practice of protecting a computer network from unauthorized access, misuse, malfunction, modification, destruction, or improper disclosure, ensuring the confidentiality, integrity, and availability of data and resources.

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Full Network security glossary entry →

Term 326

Network Security Group

A Network Security Group is a set of rules that controls inbound and outbound traffic to Azure resources like virtual machines and subnets.

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Full Network Security Group glossary entry →

Term 327

Network segmentation

Network segmentation is the practice of dividing a computer network into smaller, isolated parts to improve performance, contain security threats, and simplify management.

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Term 328

NGFW

A Next-Generation Firewall is a security device that inspects network traffic deeply, beyond just IP addresses and ports, to block modern threats like malware and intrusions.

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Term 329

Non-repudiation

Non-repudiation is a security principle that ensures a party in a digital transaction cannot deny their involvement or the authenticity of their digital signature.

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Full Non-repudiation glossary entry →

Term 330

Numbered ACL

A numbered ACL is an access control list on a router or firewall that uses a number to identify the list and define rules for permitting or denying traffic based on source and destination IP addresses, ports, and protocols.

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Full Numbered ACL glossary entry →
← Part 10Part 12 →

Acronym parts

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Study resources

All SY0-701 Acronyms→SY0-701 Practice Tests→SY0-701 Study Guide→Exam Domains→