Match the LIST-I with LIST-II.
| LIST-I (SMTP Response Code) | LIST-II (Description) |
|---|---|
| A. 214 | I. Service Ready |
| B. 421 | II. Transaction Failed |
| C. 220 | III. Help message |
| D. 554 | IV. Service Not Available |
Pick an option to check yourself, or open the answer below.
Show answer & explanation
Correct answer: A. A-III, B-IV, C-I, D-II
Explanation
In the SMTP reply-code scheme, code 214 is the reply to a HELP command and carries a help message, so A pairs with III. Code 421 means the service is not available and the transmission channel is being closed, so B pairs with IV. Code 220 is returned when the service is ready to proceed (the greeting banner), so C pairs with I. Code 554 indicates that the transaction has failed, so D pairs with II. The match is therefore A-III, B-IV, C-I, D-II.More Data Communication and Computer Networks questions
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