CompTIA A+ Notes

RAM

Random access memory allows cpu to store temporary data to make logical decisions… RAM is volatile which means info stored on ram disappeaars as soon as comp is switched off CPU stores a tiny bit of info on a ram called SRAM or static ram..more [view]

By: justincruiz | Related Lesson: RAM | Modified: June 20, 2016

USB

USB 1.1-12MBS-5 METER LENGTH USB 2.0-48MBS-5 METER (HIGH SPEED ) USB 3.0- 5 GB- 5 METER (SUPER SPEED) LOW POWER USB -1.5MBS- 3M COMMON type A TYPE B SQUARE TYPE B3.0 STANDARD AND MICRO + FOR 2.0 AND SS FOR 3.0 [view]

By: Jithinshr | Related Lesson: USB Universal Serial Bus | Modified: June 20, 2016

BIOS

BIOS Basic Input output system lets computer understand commands. [view]

By: tanerr | Related Lesson: BIOS - Basic Input Output System | Modified: June 20, 2016

Fans

Fans suck cool air in and push out hot air outside with a window oppsite to fan..dust and heat are enemies….Check thermal paste which is on metal components like metal cover of cpu which helps better convection of heat and helps fan eliminate t [view]

By: justincruiz | Related Lesson: Fans | Modified: June 20, 2016

jumpers and power connectors

Jumpers are small pins located around the mb…they can be in sets of 2 or large bunches….they can change different changes of comp….different power to power buttons…front panel displays..depends on mb which each jumpers control [view]

By: justincruiz | Related Lesson: Jumpers & Power Connectors | Modified: June 20, 2016

BIOS Security

Security for the BIOS can help to lockdown your BIOS, preventing people from re-configuring it , sticking a drive or disk in it to add another operating system etc. this can be done using  – S.password = supervisor password – u.password [view]

By: toffee | Related Lesson: Security | Modified: June 20, 2016

module 1.1 security

locking down bios. s-password/u-password – lojac – installed on OS but has a persistence module that allows it to be reinstalled. TPM – trusted platform module holds encryption keys –  [view]

By: zanott | Related Lesson: Security | Modified: June 20, 2016

diagnostics

POST – Power On Self Test – CPU & POST test – System Timer -Video Card -Memory -Keyboard -Disk Drives beeps come from motherboard – these are signs there is a problem depends on motherboard manufacturer. error codes on scr [view]

By: zanott | Related Lesson: Diagnostics | Modified: June 20, 2016

SUMMARY

>>POST-POWER,ON,SELF,TEST = TEST WHEN TURNING ON >>IF ERROR == COMPLETELY STOP -CPU -SYSTEM TIMER -VIDEO CARD -MEMORY -KEYBOARD -DISK DRIVES >>POST CARD – IF EVERYTHING FAILS [view]

By: dongu | Related Lesson: Diagnostics | Modified: June 20, 2016

BIOS Security

Security: supervisor passwords -vs- user passwords supervisor can make changes; user is given privileges by supervisor in the event of theft, can use ”Lojac” has certain actions; find location, remotely erase info, etc TPM – [view]

By: | Related Lesson: Security | Modified: June 20, 2016

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