CompTia A+(Domain 1.0 Mobile Devices)

STUDY

what laptop comments are commonly replaced or upgraded?

Battery, keyboards/keys, RAM, hard drive/SSD, wireless cards, privacy/security hardware, wifi antenna, camera, and microphone

what should you check before replacing a laptop battery

check battery for swelling, which his dangerous and may cause fire or device damage

what type of RAM do laptops usually take

SODIMM(small outline dual in-line memory module)

what’s the difference between HDDs and SSD in laptops

HDDs are mechanical, slower and cheaper while SSDs are solid-state, faster and more reliable

what wireless modules might a laptop contain

wifi cards, bluetooth modules, and cellular modem cards

what laptop components provide privacy/ security

smart card readers, fingerprint scanners, webcams with shutters, and TPM chips

what are examples of laptop input/output comments that may need replacement

touchpads, screens, cameras, microphones, and keyboards

what types of mobile device displays are most common

LCD, OLED, and mini-LED

how do LCDs work

they use liquid crystal layer with a backlight (CCFL or LED) to produce image

what does an inverter do in older LCD laptops

converts DC to AC power for CCFL backlights

what makes OLED different from LCD

OLED pixels emit their own light, resulting in better contrast, thinner panels, and no need for backlight

what is mini-LED technology

uses many small LEDs for finer backlight control, higher brightness, and improved HDR

what is screen resolution

the number of horizontal x vertical pixels

what is pixel density and why does it matter

pixels per inch and higher density = sharper images and text

what’s the difference between a docking station and a port replicator

a docking station provides charging and extra ports while a port replicator provides extra ports

what’s the purpose of a stylus

to allow precise touch input on a capacitive screen

what types of wired connections are common in mobile devices

USB-C, micro USB, miniUSB, lightning(apple)

what types of wireless connections are common in mobile devices

bluetooth, NFC, infrared, and wifi

what’s the difference between wifi and cellular connection

WI-FI connects to local wireless networks, while cellular uses carrier’s mobile network

what is NFC used for

contactless payment, quick pairing, and short-range data transfer

what is bluetooth used for

short-range wireless connection

what is tethering

sharing a phones mobile data connection with other devices via USB, bluetooth or wifi

what is a mobile hotspot

a device that shares internet with other devices over wifi

what are common email protocols used pin mobile devices

IMAP, POP3, and SMTP

what is the role of an MDM( mobile device management) solution

enforces company polices, configures devices remotely, pushes apps, and secures data

what is the purpose of mobile device synchronization

to keep data like contacts, calendar, and files consistent across devices

what are common synchronization methods

local sync via USB or wifi direct, and cloud synchronization over the internet

what is an eSIM and how is it used

an embedded SIM card that can be reprogrammed with carrier information without swapping physical SIMs

what are common cloud services used for synchronization

apple iCloud, google drive, Microsoft one drive, and dropbox