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.
The top number in a blood pressure reading refers to the systolic pressure. It measures the pressure inside your blood vessels at the moment your heart beats. The bottom number represents your diastolic pressure. It measures the pressure in your blood vessels when your heart is resting between heartbeats.