This diagram is divided into the following four sections, from top to bottom.

• Public: This represents external access to Oracle Collaboration Suite and includes the following characteristics:

  • Public IP addresses are shown to external users.

  • Users can connect through a NAT layer using HTTP, HTTPS or SMTP. Oracle Real-Time Collaboration connects through a proprietary protocol.

• DMZ: The demilitarized zone between the outside world and Oracle Collaboration Suite; includes:

  • Two Reverse Proxy servers using ports 80 and 443.

  • Two SMTP relay servers using port 25.

  • Two load balancers handling traffic on ports 80 and 443.

  • Tunneled Web Conferencing traffic to the Applications tier.

• Internal: The internal network, including the following tiers, each residing on their own server:

  • Two Applications tier computers (ocs.acme.com), using IP 10.10.10.1, and IP 10.10.10.2, IP.

  • Two Applications tiers computers (sso.acme.com), using 10.10.10.3, and IP 10.10.10.4.

  • Two Infrastructure tier computers.

• Organization Network: Supports all connection protocols to the Applications tier.