Term 631
Perfect forward secrecy
Perfect forward secrecy is a property of secure communication protocols that ensures that even if a long-term private key is compromised, past session keys and the messages they encrypted remain safe from decryption.
Acronym study
Terms 631–660 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 631
Perfect forward secrecy is a property of secure communication protocols that ensures that even if a long-term private key is compromised, past session keys and the messages they encrypted remain safe from decryption.
Term 632
The performance efficiency pillar is a set of design principles and best practices within the AWS Well-Architected Framework that focuses on using computing resources effectively to meet system requirements while maintaining efficiency as demand changes.
Term 633
Peripheral Component Interconnect (PCI) is a standard slot and bus system inside a computer that allows you to connect expansion cards like network cards, sound cards, and graphics cards to the motherboard.
Term 634
PCI Express (PCIe) is a high-speed expansion bus standard that connects internal hardware components like graphics cards, SSDs, and network adapters to a computer's motherboard.
Term 635
Any external hardware component that connects to a computer to add or enhance functionality, such as input, output, or storage capabilities.
Term 636
Persistent Disk is a durable, high-performance block storage service for Google Cloud virtual machines that retains data even after the VM is shut down or deleted.
Term 637
A Personal Area Network (PAN) is a small network that connects devices within a person's immediate workspace, typically within a range of about 10 meters.
Term 638
A personal computer is a general-purpose computing device designed for individual use, running operating systems like Windows, macOS, or Linux.
Term 639
PHI stands for Protected Health Information, which is any health data that can identify an individual and is protected by the Health Insurance Portability and Accountability Act (HIPAA).
Term 640
PII stands for Personally Identifiable Information, which is any data that can be used to identify a specific individual.
Term 641
Ping is a network utility used to test whether a remote computer or device is reachable across an IP network and to measure the round-trip time of data packets.
Term 642
A PMKID attack is a wireless network attack that exploits a vulnerability in the RSN IE (Robust Security Network Information Element) of Wi-Fi Protected Access (WPA/WPA2) networks to recover the Pre-Shared Key (PSK) without needing to capture the full four-way handshake.
Term 643
Power over Ethernet (PoE) is a technology that lets network cables carry electrical power to devices like cameras and phones, so they don't need a separate power outlet.
Term 644
PoE+ (Power over Ethernet Plus) is a networking standard that delivers up to 30 watts of electrical power along with data over a single Ethernet cable to devices like IP cameras and wireless access points.
Term 645
A point-to-point link is a direct communication connection between two devices or network nodes that allows them to exchange data without passing through any other intermediate device.
Term 646
Point-to-point OSPF is a network configuration where Open Shortest Path First routing protocol operates over a direct link between exactly two routers, treating the link as a simple connection without the need for a designated router or backup designated router.
Term 647
A networking protocol that creates a secure tunnel for data to travel between two points over the internet, often used for VPNs.
Term 648
A DNS pointer record (PTR) maps an IP address to a domain name, performing the reverse of a standard A or AAAA record.
Term 649
Traffic policing is a network mechanism that monitors data traffic against a configured rate limit and drops or remarks packets that exceed that limit to enforce bandwidth usage.
Term 650
Policy as code is the practice of representing and managing security, compliance, and governance rules as executable code, enabling automated validation and enforcement across infrastructure and software development workflows.
Term 651
Pop-up ads are unsolicited browser windows or overlays that appear automatically while browsing, often used for advertising or, maliciously, to spread malware.
Term 652
POP3 (Post Office Protocol version 3) is an email protocol that downloads messages from a mail server to a single device and then typically deletes them from the server.
Term 653
A networking technique that maps multiple private IP addresses and their ports to a single public IP address using unique port numbers.
Term 654
A port channel is a technology that groups multiple physical network links into a single logical link to increase bandwidth and provide redundancy.
Term 655
Port forwarding is a network technique that directs incoming traffic from the internet to a specific device or service inside a private local network.
Term 656
Port mirroring is a network monitoring technique that sends a copy of all packets seen on one switch port (or VLAN) to another port for analysis.
Term 657
A port number is a 16-bit number used in networking to identify a specific application or service on a device in a network communication.
Term 658
Port security is a network switch feature that restricts which devices can connect to a port based on the device's MAC address, preventing unauthorized access.
Term 659
PortFast is a Cisco switch feature that immediately brings a port into the forwarding state, bypassing the normal Spanning Tree Protocol (STP) listening and learning phases, so that devices connected to that port can start communicating right away.
Term 660
Power-On Self-Test (POST) is a diagnostic process that a computer runs when it first powers on to check that essential hardware components are working correctly before loading the operating system.