helpdeskdan
Technical User
I got killed on troubleshooting section on the #*@& CIT. (803/804 for those who didn't hear)
Let's say you are telnetting to port 25 to test your email server connectivity. (NOT an actual question on the exam - pls no sue me, no $ anyway - all gone on exam retake) What did you just test - layer 4 right? It's a TCP port. Or, did you? Telnet is layer 7 application - so maybe you just tested through layer 7. See how confusing it gets? I understand the layers and the protocols well, but, a question like this really gets me. It's easy to say that this will verify connectivity to the mail server and that success would mean a defective client. But the answer to a question like this.... ARG!
Let's say you are telnetting to port 25 to test your email server connectivity. (NOT an actual question on the exam - pls no sue me, no $ anyway - all gone on exam retake) What did you just test - layer 4 right? It's a TCP port. Or, did you? Telnet is layer 7 application - so maybe you just tested through layer 7. See how confusing it gets? I understand the layers and the protocols well, but, a question like this really gets me. It's easy to say that this will verify connectivity to the mail server and that success would mean a defective client. But the answer to a question like this.... ARG!