CompTIA A+ Notes

Twisted Pair Cables – RJ45 Straight, Crossover & T2

RJ45-100 meters Straight (computer to router)(same color Scheme) Crossover (T568A to T568B)(connect two similar devices/computer to computer) T1 Crossover(T1 router to T1 switch) (Pin 1 to pin 4, 2 to 5, 4 to 1, and 5 to 2 [view]

By: landonrh | Related Lesson: Twisted Pair Cables - RJ45 Straight, Crossover & T2 Crossover | Modified: April 3, 2018

1.5 - Floppy Drive & Tape Drives

3.5 inch Floppy: the standard floppy disk Floppy Sizes: DSDD: Stores up to 720KB DSHD: Stores up to 1.44MB DSED: Stores up to 2.88MB Floppys are only used now in emergency recovery situations.  When using, make sure the Floppy drive is enabled in th [view]

By: asahendrix | Related Lesson: Floppy Drives & Tape Drives | Modified: April 3, 2018

Twisted Pair Cables – RJ45 Categories & Network Types

RJ45 -100 Meters Cable Strand Cat3 -10 MBs-16 MHz(frequency) Cat5-100mbs- 100MHz-155 Mbs ATM(Asynchronous Transfer Mode) Cat5e-100mbs- 100 MHz-155 MBs ATM Cat6-1GBS-1000mbs-250 MHz\ Cat6a-10GBs-550MHz Network 10baseT- 10 MBs(Ethernet)CAT3 100baseT [view]


Twisted Pair Cables – RJ45 Color Patterns, UTP & Max

 Unlike the Rj11, the Rj45 cable has an 8-pin connector a multi-color wiring scheme.  You’ll learn what TS68A & B are and why there is a difference in how the color patterns are used. 100 Meter max [view]

By: landonrh | Related Lesson: Twisted Pair Cables - RJ45 Color Patterns, UTP & Max Length | Modified: April 3, 2018

1.5 - RAID

RAID: Redundant Array Independent Disks – allows us faster read/write speeds or extra security with your data. Multiple types. Basic Types of RAID (in this demonstration): RAID0 – Striping – at least 2 hard drives that you can write [view]

By: asahendrix | Related Lesson: RAID | Modified: April 3, 2018

RAID

redundant Array of Independent Disks RAID O- Striping- At least (2) drives that write simultaneously at the same time- Speed only RAID 1- Mirroring- Having DATA that is more stable RAID 10- Thats 1 & 0 put together- It has at least 4 drives. It c [view]

By: natechaloux100 | Related Lesson: RAID | Modified: April 5, 2018

Flash Memory

USB device- Compact Flash card- high end cameras. SD card- mini- micro- Flash Drives XD cards [view]

By: natechaloux100 | Related Lesson: Flash Memory | Modified: April 3, 2018

Course references

Hardware exam objectives site https://certification.comptia.org/docs/default-source/exam-objectives/comptia-a-220-901-exam-objectives.pdf   Operating systems https://certification.comptia.org/docs/default-source/exam/objectives/comptia-a-220-902-exa [view]

By: beckbrian | Related Lesson: Overview of Changes 801 vs 901 Part 1 | Modified: April 3, 2018

twisted pair- rj11 and rj45

RJ11 6 pin/ 2 wire RJ45 8 wire/8 connector [view]

By: landonrh | Related Lesson: Twisted Pair Cables - RJ11 vs RJ45 | Modified: April 3, 2018

Twisted Pair Cables – STP vs UTP

Twisted Pair Protects against EMI(Electro magnetic interference) STP(shielded for protection) vs UTP(Less expensive and not as bulky) [view]

By: landonrh | Related Lesson: Twisted Pair Cables - STP vs UTP | Modified: April 3, 2018

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