To inhibit strangler messages, the node checks and compares the SSN appearing in format line 2 against the corresponding end-of-messages validation number appearing in which format line?

To inhibit strangler messages, the node checks and compares the SSN appearing in format line 2 against the corresponding end-of-messages validation number appearing in which format line?

• A. 15
• B. 10
• C. 12
• D. 20

Answer: (A)

Messages in this system use fixed positions for fields, so you can reliably verify integrity by cross-checking data that should match across the format. The SSN found on the second line is paired with an end-of-message validation number that confirms the entire message is complete and untampered. According to the standard format, that end-of-message validation number appears on the fifteenth line. So the correct check is to compare the SSN from line two with the validation number on line fifteen. If they align, the message is accepted; if they don’t, it’s treated as potentially invalid, helping to prevent strangler messages that try to slip in incorrect data at the end. The other line positions aren’t designated for this end-of-message validation in the standard, so they wouldn’t provide the reliable, agreement-based check needed.

Messages in this system use fixed positions for fields, so you can reliably verify integrity by cross-checking data that should match across the format. The SSN found on the second line is paired with an end-of-message validation number that confirms the entire message is complete and untampered. According to the standard format, that end-of-message validation number appears on the fifteenth line. So the correct check is to compare the SSN from line two with the validation number on line fifteen. If they align, the message is accepted; if they don’t, it’s treated as potentially invalid, helping to prevent strangler messages that try to slip in incorrect data at the end. The other line positions aren’t designated for this end-of-message validation in the standard, so they wouldn’t provide the reliable, agreement-based check needed.