October 2019
Beginner to intermediate
1040 pages
27h 25m
English
Content preview from CompTIA A+ Core 1 (220-1001) and Core 2 (220-1002) Cert Guide, 5th Edition
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Appendix C. Memory Tables
Chapter 1
Table 1-2 Comparison of HDD, SSD, and SSHD
Type of Hard Drive |
Cost |
Capacity |
Speed |
Reliability |
|---|---|---|---|---|
HDD |
|
|
|
|
SSD |
|
|
|
|
SSHD |
|
|
|
Table 1-4 SODIMM Features
Memory Type |
Number of Pins |
Notch Location |
Notes |
|---|---|---|---|
DDR |
|
|
67.6mm long and 30mm high Notch closer to short end* than with DDR2 |
DDR2 |
|
|
Notch closer to long end* than with DDR |
DDR3 |
|
|
Same dimensions as DDR, DDR2 |
DDR4 |
|
|
69.7mm long and 30mm high |
* Short end = left side (20 pins); long end = right side (80 pins) front view
Chapter 2
Table 2-2 Common Protocols and Their Ports
Port Number(s) |
Protocol |
Port Type |
|---|---|---|
21 |
|
|
22 |
|
|
23 |
|
|
25 |
|
|
53 |
|
|
80 |
|
|
110 |
|
|
143 |
|
|
443 |
|
|
3389 |
|
|
137–139 |
|
|
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