To answer this question, you need to understand the different router series and how they address their port numbers.
Option A) 1000 - This option is incorrect because the 1000 router series does not require the port numbers to be addressed in the format of slot/adapter/port number.
Option B) 2600 - This option is incorrect because the 2600 router series does not require the port numbers to be addressed in the format of slot/adapter/port number.
Option C) 2500 - This option is incorrect because the 2500 router series does not require the port numbers to be addressed in the format of slot/adapter/port number.
Option D) 7500 - This option is correct because the 7500 router series does need its port numbers to be addressed in the format of slot/adapter/port number. In this series, the port numbers are specified using the format of slot/adapter/port number.
Option E) none of the above - This option is incorrect because the correct answer is D, the 7500 router series.
The correct answer is D. The 7500 router series needs its port numbers to be addressed in the format of slot/adapter/port number.