Term 1
/etc/hosts
A local text file on Unix-like operating systems that manually maps hostnames to IP addresses, overriding DNS for specified entries.
Acronym study
Terms 1–30 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 1
A local text file on Unix-like operating systems that manually maps hostnames to IP addresses, overriding DNS for specified entries.
Term 2
/etc/resolv.conf is a configuration file on Linux and Unix-like systems that tells the computer which Domain Name System (DNS) servers to use when converting domain names like google.com into IP addresses.
Term 3
The 24-pin motherboard connector is the main power cable that connects the computer's power supply unit (PSU) to the motherboard, supplying electricity to the motherboard and its components.
Term 4
32-bit File Allocation Table (FAT32) is a file system that organizes data on storage devices like hard drives and USB flash drives using a 32-bit addressing scheme to track where files are stored.
Term 5
5G is the fifth generation of cellular network technology, designed to deliver faster speeds, lower latency, and support for many more connected devices than previous generations.
Term 6
The 8-pin CPU connector is a power cable from the power supply that delivers dedicated electricity to the processor on a computer's motherboard.
Term 7
802.1Q is the networking standard that allows multiple virtual LANs (VLANs) to share a single physical network link by tagging Ethernet frames with VLAN identification information.
Term 8
802.1X is a network access control standard that authenticates devices before they are allowed to connect to a wired or wireless network.
Term 9
An A record is a DNS record that maps a domain name to the IPv4 address of the server hosting that domain.
Term 10
An A record is a type of DNS resource record that maps a domain name to an IPv4 address.
Term 11
AAA (Authentication, Authorization, and Accounting) is a security framework that controls who can access a network, what they are allowed to do, and tracks what they did.
Term 12
An AAAA record is a DNS record that maps a domain name to an IPv6 address, allowing devices to find each other over the internet using the newer IP addressing system.
Term 13
An Area Border Router is an OSPF router that connects multiple OSPF areas, including the backbone area, and exchanges routing information between them.
Term 14
An acceptable use policy is a set of rules that an organization creates to define how employees and other users may use its computer systems, networks, and data.
Term 15
An access point is a device that creates a wireless local area network, usually by connecting to a wired network and broadcasting a Wi-Fi signal for computers, phones, and tablets to join.
Term 16
An access port is a switch port that connects to a single end device, like a computer or printer, and carries traffic for only one VLAN.
Term 17
An Access Control List is a set of rules that determines who or what can access specific network resources or data.
Term 18
Address Resolution Protocol (ARP) is a network protocol that maps a device's IP address to its physical MAC address so data can travel across a local network.
Term 19
Administrative distance is a number that a router uses to decide which routing protocol's route to trust when it learns about the same destination from multiple different routing protocols.
Term 20
Advanced Micro Devices (AMD) is a company that designs and manufactures central processing units (CPUs), graphics processing units (GPUs), and other computer hardware components used in personal computers, servers, and embedded systems.
Term 21
Advanced RISC Machine (ARM) is a family of energy-efficient processor architectures based on reduced instruction set computing, widely used in mobile devices, embedded systems, and increasingly in servers and laptops.
Term 22
Advanced Technology Extended (ATX) is a motherboard form factor specification that defines the physical dimensions, mounting points, power connector layout, and cooling requirements for desktop computer systems.
Term 23
AES is a fast and secure encryption standard used worldwide to protect sensitive data by scrambling it so only authorized parties can read it.
Term 24
AH (Authentication Header) is an IPsec protocol that provides connectionless integrity, data origin authentication, and anti-replay protection for IP packets.
Term 25
AH (Authentication Header) is an IPsec protocol that provides connectionless integrity, data origin authentication, and anti-replay protection for IP packets.
Term 26
Aircrack-ng is a suite of wireless network security tools used to capture packets, monitor networks, and crack WEP and WPA-PSK keys for penetration testing and security auditing.
Term 27
An Alias record is a DNS record type that maps a hostname to another hostname, seamlessly routing traffic to AWS resources like load balancers or CloudFront distributions.
Term 28
Allowed VLANs are the specific VLANs whose traffic is permitted to pass over a specific trunk link between switches, acting as an access control filter for VLAN traffic on a port.
Term 29
An alternate port is a switch port that offers a backup path to the root bridge in a Spanning Tree Protocol network, remaining blocked until the primary path fails.
Term 30
Ansible is an open-source automation tool that IT professionals use to configure systems, deploy software, and manage infrastructure without needing to install agent software on every managed machine.