Protocol

/ˈaɪ-mæp/

n. “Check your mail without moving it.”

IMAP, short for Internet Message Access Protocol, is a standard protocol used by email clients to retrieve messages from a mail server. Unlike older protocols that download and remove emails from the server, IMAP allows users to read, organize, and manipulate their messages while keeping them on the server, providing a consistent view across multiple devices.

/ˌaɪ-ˈpiː/

n. “Addresses in a digital world.”

IP, short for Internet Protocol, is the fundamental addressing system that allows devices to locate and communicate with each other across networks. Think of it as the digital equivalent of a postal address — without it, your messages, packets, and data would have nowhere to go. IP works hand-in-hand with TCP to form the foundation of the internet, commonly referred to as TCP/IP.

/ˌjuː ˌdiː ˈpiː/

noun — "the lightweight protocol that sends data without waiting for confirmation."

/ˌtiː-siː-ˈpiː/

n. “Reliable conversations over an unreliable world.”

TCP, short for Transmission Control Protocol, is one of the core protocols of the Internet protocol suite. It provides reliable, ordered, and error-checked delivery of data between applications running on hosts connected to a network. TCP works hand-in-hand with IP, forming the ubiquitous TCP/IP foundation of modern networking.

/ˌɛs-ɛf-ti-ˈpi/

n. “Securely moving files without looking over your shoulder.”

SFTP, short for SSH File Transfer Protocol or sometimes Secure File Transfer Protocol, is a network protocol that provides secure file transfer capabilities over the SSH (Secure Shell) protocol. Unlike traditional FTP, which sends data in plaintext, SFTP encrypts both commands and data, ensuring confidentiality, integrity, and authentication in transit.

/ˌɛf-ti-ˈpi/

n. “Moving files, one connection at a time.”

FTP, short for File Transfer Protocol, is one of the oldest network protocols designed to transfer files between a client and a server over a TCP/IP network. Dating back to the 1970s, it established a standardized way for computers to send, receive, and manage files remotely, long before cloud storage and modern APIs existed.

/ˌeɪ-pi-ˈaɪ/

n. “Talk to the machine without learning its secrets.”

API, short for Application Programming Interface, is the set of rules, protocols, and tools that allows different software applications to communicate with each other. Think of it as a contract: you send requests in a specified format, and the system responds in a predictable way. APIs are everywhere — powering web services, mobile apps, cloud platforms, and even operating system features.

/ˈel-tuː-tiː-piː/

n. “A tunnel that forgot to bring a lock.”

L2TP, short for Layer 2 Tunneling Protocol, is a networking protocol designed to create virtual tunnels across IP networks. Its job is not secrecy, not encryption, and not trust — its job is encapsulation. L2TP takes packets from one place, wraps them neatly, and delivers them somewhere else as if they had always belonged there.

/ˈoʊpən-viː-piː-ɛn/

n. “A private tunnel built out of public roads.”

OpenVPN is an open-source virtual private networking protocol and software suite designed to create secure, encrypted connections across untrusted networks. It exists to solve a simple but dangerous problem: the internet is shared, noisy, and hostile, yet people still need to move private data across it without being watched, altered, or impersonated.

/ˌaɪ-piː-ˈɛsɛk/

n. “The armored lanes of your network traffic.”

IPSec, or Internet Protocol Security, is a suite of protocols designed to secure IP communications by authenticating and encrypting each IP packet in a data stream. It operates at the network layer, meaning it can protect all traffic crossing an IP network, from simple emails to complex enterprise applications. Its primary goals are confidentiality, integrity, and authenticity of the data in transit.