There are other things that Domino can do…. These are done by adding to the base Domino environment. This is so the products can utilise the robust and secure Domino infurstructure.
<b>IBM / Lotus Products</b>:
Sametime – Instant Messaging… and allot more.
Quickr – Team rooms – webbased WIKI – Bloggs etc
Connections – Joint Working – Corporate social networking
BES – Blackberry Enterprise Server
As you can see the Domino platform can be used for allot. It can also be used as a authentication server via LDAP for other prodcuts to unitlise the same security information.
IBM are priding themselves in building a platform that can last and will intergrate with more and more product with every release.
As per the discussion the things you have stated can all be part of the same Domino Server. Each servr can do it all. Performance permitting.
<b>Administration server</b> – used to update the readers and authors field in the Domino Directory
<b>Replication server</b> – used as a replication HUB for regional or inter corporate connections.
<b>Cluster Server</b> – A Domino Server that is part of a Domino Cluster.
<b>Application Server</b> – A server that has databases that use Domino to run AGENTS / Document Storage / etc
<b>Mail Only</b> – Servers that do not have the full range of protocols and tasks that run under Domino
<b>SMTP Server </b>- a Domino Server with SMTP Listernet turned on and a connection to the internet to route mail
<b>Directory Server</b> – a Domino server used for Searching – ie Address lookups
<b>Webserver</b> – a Domino server that is running the HTTP Task
Basically there are many uses for the platform. I hope this helps you to understand what Domino is rather than answer the question.