Term 661
Service failure
A service failure is an interruption or degradation of a software application, system, or network component that prevents it from delivering its intended function to users or other systems.
Acronym study
Terms 661–690 of 826 220-1201 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
A service failure is an interruption or degradation of a software application, system, or network component that prevents it from delivering its intended function to users or other systems.
Term 662
A Service Set Identifier (SSID) is the public name of a Wi-Fi network that devices use to identify and connect to it.
Term 663
Session Initiation Protocol (SIP) is a signaling protocol used to start, maintain, and end voice and video calls over IP networks.
Term 664
SFTP (SSH File Transfer Protocol) is a secure method for transferring files over a network using an encrypted SSH connection.
Term 665
A shard is a horizontal partition of data in a database or storage system, where each shard holds a subset of the total data and operates independently to distribute load.
Term 666
A shared access signature (SAS) is a secure, time-limited URL that grants granular access to specific resources in cloud storage, allowing you to delegate permissions without sharing your account keys.
Term 667
Shared resources are computing assets like storage, memory, or network bandwidth that multiple users or systems can access simultaneously from a common pool.
Term 668
A Shared VPC allows multiple projects or accounts within a cloud environment to use the same Virtual Private Cloud (VPC) network, enabling centralized management and isolation of resources.
Term 669
A shield in IT networking is a conductive layer around a cable or device that blocks electromagnetic interference to protect signal integrity.
Term 670
Shielded Twisted Pair (STP) is a type of copper cabling that uses a metallic shield around twisted wire pairs to reduce electromagnetic interference and protect data signals.
Term 671
Short Message Service (SMS) is a text messaging service that allows short messages to be sent between mobile phones, pagers, and other devices using standardized communication protocols.
Term 672
Side-loading is the process of installing software on a mobile device from a source other than the official app store.
Term 673
A Signed URL is a time-limited, authenticated web link that grants temporary access to a private resource without requiring the user to log in.
Term 674
A SIM card is a small, removable chip in mobile devices that securely stores the subscriber identity to connect to a cellular network.
Term 675
Simple Mail Transfer Protocol (SMTP) is the standard internet protocol used for sending and relaying email messages from a client to a server or between servers.
Term 676
A Service Level Agreement (SLA) is a contract between a service provider and a customer that defines the level of service expected, including metrics like uptime, response time, and penalties for non-compliance.
Term 677
Slow performance means a computer, application, or network takes longer than expected to complete tasks, often due to resource limits, software conflicts, or hardware degradation.
Term 678
Small Computer System Interface (SCSI) is a set of standards for connecting and transferring data between computers and peripheral devices like hard drives, scanners, and tape drives.
Term 679
A Small Form-factor Pluggable (SFP) is a compact, hot-swappable transceiver module used to connect networking devices to fiber optic or copper cables, converting electrical signals into light signals for data transmission.
Term 680
A compact version of a standard RAM stick, mainly used in laptops and small form factor computers to provide system memory.
Term 681
A smartphone is a handheld mobile device that combines cellular communication with computing capabilities, running an operating system that supports third-party applications, internet connectivity, and a touchscreen interface.
Term 682
SMB (Server Message Block) is a network protocol used primarily for sharing files, printers, and other resources between computers over a local network.
Term 683
SMTP (Simple Mail Transfer Protocol) is the standard internet protocol used to send emails from a client to a server or between email servers.
Term 684
A snapshot is a point-in-time copy of a system's data or state, used for backup, recovery, or testing without disrupting the original.
Term 685
A network protocol used to collect and organize information about managed devices on IP networks and to modify that information to change device behavior.
Term 686
SO-DIMM is a compact memory module used in laptops, small form factor PCs, and other space-constrained devices to provide system RAM.
Term 687
A software-defined network (SDN) is a networking approach that separates the control plane (how traffic is directed) from the data plane (where traffic moves), allowing network administrators to manage and optimize traffic flow centrally through software instead of relying on individual hardware switches and routers.
Term 688
A Software-defined Wide Area Network (SD-WAN) is a virtual network architecture that uses software to manage and optimize the connections between branch offices and data centers across a wide geographic area.
Term 689
A solid-state drive (SSD) is a storage device that uses flash memory to save data permanently, with no moving parts, making it much faster and more durable than a traditional hard disk drive.
Term 690
A sort key is a field or attribute used to determine the order in which data items are arranged within a database or storage system, often in combination with a partition key.