This website is in a testing phase and may contain errors. If any error is detected, please send an email to jaime.garciareinoso@uah.es
The fields requested in these exercises are a subset of those defined in the IP header and DNS messages.
It is recommended to do the exercise on paper first and then transfer it to the exercise form.
Once your answer is submitted, correct fields are marked in green and incorrect ones in red. If you have three or more errors, correction will stop and unchecked answers will be marked in yellow.
If you have any errors, it is recommended to click the "back" button in your browser and correct the incorrect fields.
Remember that you have the Augmented Mental Map of DNS here in case something is unclear.
The format of the messages requested in these exercises is unrelated to what might be asked in an AR1 exam.