MTA certification addresses a wide spectrum of fundamental technical concepts, assesses and validates your core technical knowledge, and enhances your technical credibility. Note MTA exams do not qualify for MCP certification, nor are they a prerequisite for MCSA or MCSD certification.
The bottom number is the more important of the two. The bottom number of your BP (104) is a bit high. That's the pressure in your blood vessels after your heart has contracted and is now at momentary rest. Average is about 80. Your upper number (128) corresponds to the pressure in your vessels when your heart contracts.
When blood pressure is measured, we commonly record the pressure as two numbers, one above the other - like a fraction. The top number is the systolic blood pressure. This is the pressure in the artery during the beating of the heart (systole). This is the pressure that creates the pulse we feel in the wrist or neck. The bottom number is the diastolic blood pressure.