TCP/IP uses an Internet Protocol (IP) address to uniquely identify each computer, and uses a port number to uniquely identify a connection or service in that computer.
The name of the computer is its hostname, and is an alias for the IP address of the computer. Operating system tools associate the hostname with the IP address of the computer.
Operating system or network administrations tools also associate the port number with a service name. The service name is an alias for the port number, and much easier to remember.
The CA Gen products, including the Client Server Encyclopedia, support IP version 4, IPv4, and IP version 6, IPv6 addresses if the CA Gen platform supports these IP versions. The hostname must be 1024 bytes or less. The service name or port number must be 32 bytes or less.
The CSE uses the system-supplied name resolution services to map the Message Dispatcher (MD) and Remote Daemon Server (RDS) names into IP addresses and port numbers. The system can look up hostnames in the system hosts file or use the Domain Name Services (DNS) to map hostnames to IP addresses, and can look up the service name in the system services file or use other services to map a service name to port number.
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