---
title: Advanced topics reference
description: This section provides background reference information for advanced replication topics.
component: pingdirectory
version: 11.0
page_id: pingdirectory:pingdirectory_server_administration_guide:pd_ds_advanced_topic_ref
canonical_url: https://docs.pingidentity.com/pingdirectory/11.0/pingdirectory_server_administration_guide/pd_ds_advanced_topic_ref.html
revdate: September 13, 2023
---

# Advanced topics reference

This section provides background reference information for advanced replication topics.

Topics in this section include:

* [About the replication protocol](pd_ds_replication_protocol.html)

* [Change number](pd_ds_change_number.html)

* [Conflict resolution](pd_ds_conflict_resolution.html)

* [WAN-friendly replication](pd_ds_wan_friendly_replication.html)

* [WAN Gateway Server](pd_ds_wan_gateway_server.html)

* [WAN message routing](pd_ds_wan_message_routing.html)

* [WAN Gateway Server selection](pd_ds_wan_gateway_server_selection.html)

* [WAN replication in mixed-version environments](pd_ds_wan_replication_mixed_version_env.html)

* [Recovering a replication changelog](pd_ds_recover_replication_changelog.html)

* [Performing disaster recovery](pd_ds_perform_disaster_recovery.html)