# IPv4

CEFR C1 · Noun

Source: https://englishreference.com/word/ipv4
Updated: 2026-08-15

## Definition

Stands for Internet Protocol version 4. The standard system used to give every device on the internet a unique address so they can find each other.

For teachers: Abbreviation for Internet Protocol version 4. The fourth revision of the Internet Protocol used to identify devices on a network through an addressing system, typically expressed as four decimal numbers separated by dots.

## Examples

- Every computer on the network requires a unique IPv4 address to communicate.
- The technician had to manually configure the IPv4 settings to resolve the local connectivity issue.
- Although IPv4 remains widely used, its limited 32-bit address space has led to the gradual global adoption of IPv6.

## Usage notes

- Often used as a modifier before nouns like 'address', 'stack', or 'network'.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.