Acronym study
Terms 271–300 of 716 CCNA 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 271
Infrastructure as code (IaC) is the practice of managing and provisioning IT infrastructure through machine-readable definition files, rather than through physical hardware configuration or interactive configuration tools.
Term 272
An inside global is the public, routable IP address that represents an internal private host when it communicates with devices on the internet.
Term 273
Inside local is the IP address assigned to a device on an internal private network before any Network Address Translation (NAT) is applied.
Term 274
Integrity is the assurance that data has not been altered or tampered with in an unauthorized way, preserving its accuracy and consistency from source to destination.
Term 275
Intent-based networking is an approach to network management where you tell the network what you want it to do (the intent), and the network automatically configures itself to achieve that goal.
Term 276
Inter-VLAN routing is the process of forwarding network traffic between different VLANs to enable communication across logically separated broadcast domains.
Term 277
An interface is a point of connection or interaction between two systems, devices, or software components that allows them to exchange information or signals.
Term 278
An interface endpoint is a private IP address inside a Virtual Private Cloud that provides direct, secure access to supported AWS services without traversing the public internet.
Term 279
An Intermediate Distribution Frame (IDF) is a physical wiring closet or rack that connects and manages the cabling between a building's main telecommunications room and the end-user devices on a specific floor or area.
Term 280
A routing protocol used within large enterprise networks to exchange routing information between routers, helping data find the best path across the network.
Term 281
Internal Border Gateway Protocol (IBGP) is a version of BGP used to exchange routing information between routers within a single autonomous system (AS).
Term 282
An Internal Gateway Protocol is a routing protocol used to exchange routing information within a single autonomous system, such as a corporate network or an internet service provider's internal network.
Term 283
An Internet gateway is a cloud networking component that provides a connection between a virtual private cloud (VPC) and the public Internet, enabling resources in the VPC to send and receive traffic to and from the Internet.
Term 284
IGMP is a communication protocol used by devices on a network to report their membership in multicast groups to nearby routers, enabling efficient group data delivery.
Term 285
Internet Mail Access Protocol (IMAP) is a standard email protocol that lets you read and manage emails stored on a mail server from multiple devices, keeping everything synchronized.
Term 286
The Internet of Things (IoT) is a network of physical devices, vehicles, appliances, and other objects embedded with sensors and software that connect to the internet to collect and exchange data.
Term 287
Internet Protocol (IP) is the set of rules that governs how data is addressed, routed, and sent from one device to another across networks, including the internet.
Term 288
Internet Protocol Address Management (IPAM) is the practice of planning, tracking, and managing the assignment and use of IP addresses on a network to ensure devices can communicate without conflict.
Term 289
Internet Protocol Security (IPsec) is a suite of protocols that encrypts and authenticates data packets sent over IP networks to ensure private and secure communication.
Term 290
A company that provides individuals and organizations access to the internet, typically for a fee.
Term 291
IP (Internet Protocol) is the set of rules that govern how data packets are sent and received between devices across networks, using unique addresses to identify each device.
Term 292
An IP address is a unique numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication.
Term 293
An IP conflict occurs when two devices on the same network attempt to use the same IP address, causing communication disruptions.
Term 294
A Cisco IOS command that forwards broadcast traffic from one subnet to a specific server on another subnet, allowing devices to obtain IP configuration or other services without needing a router or server on their local network.
Term 295
IP Source Guard is a network security feature that blocks IP address spoofing by verifying that each packet's source IP address matches an authorized binding assigned to that switch port.
Term 296
An Intrusion Prevention System (IPS) is a network security device that monitors traffic in real time and automatically blocks threats before they reach your systems.
Term 297
IPsec is a suite of protocols used to secure Internet Protocol (IP) communications by encrypting and authenticating each IP packet in a data stream.
Term 298
IPv4 is the fourth version of the Internet Protocol, a set of rules that assigns unique numerical addresses to devices so they can communicate over networks like the internet.
Term 299
An IPv4 address is a unique 32-bit numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication.
Term 300
IPv6 is the most recent version of the Internet Protocol, designed to replace IPv4 by providing a vastly larger number of unique addresses and improved network features.