Glossary The Tor Project Note: This document aims to specify terms, notations or phrases related to Tor and The Tor Project. This glossary is not a design document; it is only a reference. 0. Preliminaries The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119. 0.1 Commonly used Tor configuration terms ORPort - Onion Router Port DirPort - Directory Port 0.2 Tor network components Relay, aka OR (onion router) - Exit relay Non-exit relay Guard relay Client, aka OP (onion proxy) Bridge - Circuit - Stream Edge connection: TLS connection: Link handshake Circuit handshake