TCP, UDP, and what the transport layer decides for you
Objective 2.1 · Networking · 23% of the exam Why this matters Every port number from lesson 8 comes with a protocol attached, and candidates routinely memorise the...
CompTIA A+ Core 1 220-1201 Lessons
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The ports and protocols you have to know cold, and how to learn them once
Objective 2.1 · Networking · 23% of the exam Why this matters This is the only part of Core 1 that is straight memorisation, and candidates either accept...
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Mobile fault finding: separating hardware, software and account problems
Objective 1.4 · Mobile devices · 13% of the exam Why this matters Mobile devices are the hardest things in this exam to diagnose, for one structural reason:...
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Accounts, mail and synchronisation, and what 'synced' actually means
Objective 1.3 · Mobile devices · 13% of the exam Why this matters Adding a mail account to a phone is the single most common configuration task in...
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Mobile connectivity: Wi-Fi, cellular data, tethering and hotspots
Objective 1.3 · Mobile devices · 13% of the exam Why this matters A phone has two independent routes to the internet and switches between them constantly without...
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USB, Bluetooth, NFC and docking: connecting a mobile device to everything else
Objective 1.2 · Mobile devices · 13% of the exam Why this matters This objective looks like a list of technologies and is really a list of negotiations....
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Displays, cameras and the antennas hidden in the lid
Objective 1.1 · Mobile devices · 13% of the exam Why this matters The lid of a laptop contains four separate systems that share one hinge: the panel,...
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A bench you can actually build, and what it costs to prove each thing
Supplementary This lesson maps to no 220-1201 objective. CompTIA does not examine "build a bench", and nothing in it will be asked of you. It exists because the...
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Inside a laptop: what comes out, what does not, and the order it comes out in
Objective 1.1 · Mobile devices · 13% of the exam Why this matters The exam calls this domain mobile devices, and most candidates read that as phones. It...
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