Term 61
Backup Designated Router
A Backup Designated Router (BDR) is a router in an OSPF network that waits to take over as the Designated Router if the current one fails, reducing network downtime.
Acronym study
Terms 61–90 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 61
A Backup Designated Router (BDR) is a router in an OSPF network that waits to take over as the Designated Router if the current one fails, reducing network downtime.
Term 62
Bandwidth is the maximum amount of data that can travel over a network connection in a given amount of time, usually measured in bits per second.
Term 63
A barcode scanner is an input device that uses light or lasers to read printed barcodes and converts them into digital data for computers.
Term 64
Bash is a command-line interpreter that lets users interact with an operating system by typing text commands instead of clicking icons.
Term 65
The Basic Input/Output System (BIOS) is firmware that initializes and tests computer hardware during startup and provides runtime services for operating systems.
Term 66
A Basic Service Set Identifier (BSSID) is the unique hardware address that identifies a specific wireless access point or a group of wireless devices communicating together.
Term 67
Battery calibration is the process of resetting a laptop or mobile device's battery gauge so that it accurately reports the remaining charge.
Term 68
A bayonet-style coaxial connector used in radio frequency applications, especially for cable television and older network connections.
Term 69
BigQuery slots are units of computational capacity that determine how much processing power your queries can use in Google BigQuery.
Term 70
Biometric unlock is a security method that uses unique physical characteristics, like a fingerprint or face, to grant access to a device.
Term 71
Biometrics is the technology that uses unique physical or behavioral traits, like fingerprints or voice patterns, to verify a person's identity.
Term 72
BIOS (Basic Input/Output System) is the low-level firmware stored on a motherboard chip that initializes and tests hardware components before loading the operating system.
Term 73
A bit is the smallest unit of data in computing and digital communications, representing a single binary value of either 0 or 1.
Term 74
BitLocker is a full-disk encryption feature built into Windows that protects data by encrypting the entire drive so that unauthorized users cannot access files without the correct recovery key.
Term 75
Blank pages are printed sheets that come out of a printer with no text, graphics, or markings, indicating a failure in the printing process.
Term 76
Blob tier is a category of storage in cloud platforms (like Azure Blob Storage) that defines the cost, performance, and access frequency of data, with tiers ranging from hot for frequent access to cool and archive for rarely accessed data.
Term 77
A critical system error screen displayed by Windows when it encounters a fatal issue it cannot recover from, forcing a restart.
Term 78
Bluetooth is a short-range wireless technology used to connect devices like keyboards, mice, headphones, and smartphones without cables.
Term 79
A Bluetooth module is a small hardware component that enables wireless communication between devices over short distances using Bluetooth technology.
Term 80
A boot loop is a computer startup failure where the device repeatedly turns on and off or restarts without ever fully loading the operating system.
Term 81
Border Gateway Protocol (BGP) is the routing protocol that directs data packets between the autonomous systems that make up the global internet.
Term 82
A Bridge Protocol Data Unit (BPDU) is a special message that network switches exchange to detect and prevent loops in an Ethernet network.
Term 83
Broadband is a high-speed internet connection that can carry multiple data signals at once, like having a wide highway for all your online traffic.
Term 84
A broadcast domain is a network segment where any device can send a broadcast message that all other devices on that segment will receive and process.
Term 85
A broadcast network is a type of communication network where a single message sent from one device is received by all other devices connected to the same network segment.
Term 86
Broadcast OSPF is a mode of OSPF operation used on multi-access broadcast networks (like Ethernet) where routers automatically discover neighbors and elect a Designated Router to reduce routing update traffic.
Term 87
A browser redirect is when a web browser automatically sends a user from one web address to a different one, often without the user clicking anything, which can be caused by legitimate server instructions, malware, or network interference.
Term 88
A Blue Screen of Death (BSOD) is a stop error screen displayed by Windows when a critical system error forces the operating system to shut down to prevent damage.
Term 89
Btrfs is a modern copy-on-write file system for Linux that focuses on data integrity, snapshots, and advanced storage features.
Term 90
Business continuity is the capability of an organization to continue delivering essential services during and after a disruptive event.