Fiber Fun

Fiber Fun

Saturday, June 15, 2019

MCSA For Windows 10 Badge & Just Passed MCP For windows Server 2012 Install & Configure

Microsoft no longer issues certifications for MCP - the two I have from before February of 2019 are grandfathered. You have to complete a full MCSA series of exams before a Microsoft certificate is issued. You CAN, however, get badges via Acclaim based on the email address you registered with Microsoft for your exams. Reference THIS ARTICLE: 

Wednesday, March 6, 2019

Explanation Of What IP Broadcast Messages Are Actually USED For...

I have had a really tough time finding a decent and easily-understood explanation of how broadcast messages are actually used in IP networking. Most articles online simply explain what broadcast messages are, but leave how they are used up to the imagination.

This article from Homenet How-To is the best I have found to-date:


Tuesday, October 2, 2018

Why Is A power Button Symbol A Zero With A One Stuck In It?

"For a CMOS gate operating at a power supply voltage of 5 volts, the acceptable input signal voltages range from0 volts to 1.5 volts for a “low” logic state, and 3.5 volts to 5 volts for a “high” logic state."

HIGH = 1 = ON
LOW  = 0 = OFF

Binary 1 = +3.5 - +5 VDC = ON = HIGH
Binary 0 = 0 VDC - + 1.5 VDC = OFF = LOW

000|000|000|000|000|000|000|000 = 0
000|000|000|000|000|000|000|001 = 1 ("One" bit is turned on)
000|000|000|000|000|000|001|000 = 2 ("Two" bit is turned on)
000|000|000|000|000|001|000|000 = 4 ("Four" bit is turned on)
000|000|000|000|001|000|000|001 = 9 ("One" bit + "Eight" bit turned on) (1+8)
000|001|000|000|001|000|000|000 = 72 ("Sixty Four" bit + "Eight" bit turned on)(64+8)

If you were to read the voltages in a memory chip address, there would be a series of 1's & 0's, with the 1's represented by a voltage of +3.5 to +5 volts, and the zeroes represented by a voltage of 0 to + 1.5 Volts. You would need a REALLY tiny voltmeter probe, but that's what would be in the chip.

Ones are ON, zeroes are OFF.

Now look at the symbol on your power button. You have the choice of ON or OFF. One or Zero.