---
title: protocolInformation
description: Used with a presentationAddress attribute to provide additional information to the OSI network service.
component: pingds
version: 8.1
page_id: pingds:schemaref:at-protocolInformation
canonical_url: https://docs.pingidentity.com/pingds/8.1/schemaref/at-protocolInformation.html
---

# protocolInformation

Used with a `presentationAddress` attribute to provide additional information to the OSI network service.

|                             |                                                                |
| --------------------------- | -------------------------------------------------------------- |
| *OID*                       | 2.5.4.48                                                       |
| *Names*                     | protocolInformation                                            |
| *Syntax*                    | [ProtocolInformation](s-ProtocolInformation.html)              |
| *Equality matching rule*    | [protocolInformationMatch](mr-protocolInformationMatch.html)   |
| *Ordering matching rule*    | [caseIgnoreOrderingMatch](mr-caseIgnoreOrderingMatch.html)     |
| *Substring matching rule*   | [caseIgnoreSubstringsMatch](mr-caseIgnoreSubstringsMatch.html) |
| *Single value*              | false: multiple values allowed                                 |
| *User modification allowed* | true                                                           |
| *Usage*                     | userApplications                                               |
| *Origin*                    | [RFC 2256](https://datatracker.ietf.org/doc/html/rfc2256)      |
| *Schema file*               | 00-core.ldif                                                   |