Term 661
Post Office Protocol
Post Office Protocol (POP) is a standard internet protocol used by email clients to retrieve email from a remote server and download it to the user's local device.
Acronym study
Terms 661–690 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 661
Post Office Protocol (POP) is a standard internet protocol used by email clients to retrieve email from a remote server and download it to the user's local device.
Term 662
Post-quantum cryptography refers to cryptographic algorithms designed to resist the computational power of future quantum computers, which could break current public-key systems.
Term 663
A power connector is the physical interface on a computer component or peripheral that receives electrical power from a power supply unit or other source to make the device function.
Term 664
A Power Distribution Unit (PDU) is a device that distributes electrical power to multiple pieces of IT equipment, such as servers, switches, and routers, in a data center or server room.
Term 665
Power over Ethernet (PoE) is a technology that allows electrical power and data to be transmitted over a single Ethernet cable to devices like IP cameras, wireless access points, and VoIP phones.
Term 666
A power supply unit (PSU) is the hardware component that converts electricity from a wall outlet into usable power for a computer's internal components.
Term 667
The Power-on Self-test (POST) is a diagnostic process a computer runs immediately when you turn it on to check that essential hardware components are working correctly before loading the operating system.
Term 668
PPTP is an outdated VPN protocol that encapsulates PPP frames in IP packets for secure remote access, but is now considered insecure.
Term 669
A secret password or passphrase that two devices share beforehand to prove they are allowed to connect and communicate securely.
Term 670
Precision Time Protocol is a network protocol used to synchronize clocks across devices with extremely high accuracy, often within microseconds or nanoseconds.
Term 671
Predictability in cloud computing is the ability to reliably forecast performance, costs, and behavior of cloud resources over time.
Term 672
A prefix length is the number of bits in a subnet mask that identifies the network portion of an IP address, written after a slash (e.g., /24).
Term 673
Printer Command Language is a set of instructions that tells a printer how to format and print a page, developed by Hewlett-Packard.
Term 674
A private cloud is a cloud computing environment that is used exclusively by a single organization, offering the benefits of cloud services — like scalability and self-service — but with dedicated infrastructure that is not shared with any other company.
Term 675
A private DNS zone is a hosted DNS namespace that is only resolvable from within specific virtual networks or private environments, not from the public internet.
Term 676
A private endpoint is a network interface that securely connects a service over a private IP address inside a virtual network, keeping traffic off the public internet.
Term 677
Private Google Access lets virtual machines in a Google Cloud VPC reach Google APIs and services using private IP addresses, without needing public internet access.
Term 678
A private IP address is a non-internet-routable address used within a local network to identify devices and allow them to communicate with each other without direct exposure to the public internet.
Term 679
Private Link is a technology that lets you connect your virtual network to a service over a private, secure connection inside the cloud provider's infrastructure, instead of going over the public internet.
Term 680
A private subnet is a segmented portion of a cloud or on-premises network that is not directly accessible from the public internet, used to host internal resources securely.
Term 681
AWS PrivateLink is a service that lets you securely access services hosted on AWS VPCs as if they were on your own private network, without exposing traffic to the public internet.
Term 682
Proper disposal is the secure and environmentally responsible process of destroying, recycling, or discarding IT equipment and data-bearing devices to prevent data breaches and comply with regulations.
Term 683
Protect mode is a security feature on Cisco switches that prevents a port from learning new MAC addresses once it exceeds a configured limit, but unlike errdisable, it does not shut down the port or generate an SNMP trap.
Term 684
A proxy is an intermediary server that sits between a client and a destination server, forwarding requests and responses while providing security, privacy, and control.
Term 685
A proxy server is an intermediary device or software that sits between your computer and the internet, forwarding requests and responses while providing security, privacy, and caching.
Term 686
A pre-shared key (PSK) is a secret string of characters shared in advance between two parties to authenticate and encrypt wireless or VPN communications.
Term 687
A PSU converts AC mains power into regulated DC voltages required by computer components, ensuring stable operation.
Term 688
Precision Time Protocol (PTP) synchronizes clocks across a network to sub-microsecond accuracy, critical for time-sensitive applications.
Term 689
A PTR record is a type of DNS record that maps an IP address to a domain name, essentially performing the reverse of the more common A record.
Term 690
A public cloud is a computing model where third-party providers deliver IT resources like servers, storage, and applications over the internet to multiple customers on a pay-as-you-go basis.