Your system compares the exchanged information against the information contained in the line and controller descriptions.
During the connection process, your system sends information to the remote device, which the device uses to ensure connection to the correct system. The remote device also sends information to your system, which your system uses to ensure the connection to the correct device. If the exchanged information matches the information contained in the line and controller descriptions and other connection values are correct, the connection process continues. Likewise, the remote device performs a similar process.
Your system and the remote device use two verifications during the connection process to ensure connection to the correct device. One verification (required), matches the line description information and controller description information with the connection information that the remote device sent. If a match occurs, your system continues with the connection process.
This list shows the information that the remote device sends:
The other verification matches the exchange identifier values. For Advanced Program-to-Program Communications (APPCs), this verification is optional. Systems Network Architecture (SNA) hosts that use parallel connections require this verification.