RAID levels, and the array that is not a backup
Objective 3.1 · Hardware · 25% of the exam Why this matters RAID is a small topic with one large misconception attached, and the exam tests the misconception...
CompTIA A+ Core 1 220-1201 Lessons
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Storage: spinning disks, solid state, and the interfaces they arrive on
Objective 3.1 · Hardware · 25% of the exam Why this matters Storage is the component that most changes how a machine feels, the component that fails most...
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RAM: types, channels, and what actually fails
Objective 3.1 · Hardware · 25% of the exam Why this matters Memory is the upgrade most often recommended and most often recommended wrongly. It transforms a machine...
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CPUs: sockets, cores, and the thermal limit that decides real speed
Objective 3.1 · Hardware · 25% of the exam Why this matters Processors are the component people are most confident about and most often wrong about. The confidence...
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Network tools: what a tester, a toner and an analyser each actually prove
Objective 2.3 · Networking · 23% of the exam Why this matters Every tool in this lesson answers exactly one question, and the skill being examined is choosing...
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Copper, fibre, and terminating a cable that actually works
Objective 2.3 · Networking · 23% of the exam Why this matters Cabling is the layer everything else sits on, and it is the layer that gets blamed...
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VPNs and remote access for the small office
Objective 2.2 · Networking · 23% of the exam Why this matters Remote access is where small networks get compromised. The pattern is always the same: somebody needed...
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Setting up a small office network: the router, the wireless and the defaults
Objective 2.2 · Networking · 23% of the exam Why this matters This is the job. A technician working with small businesses and home users sets up small...
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IPv6, APIPA, and choosing between static and dynamic addressing
Objective 2.2 · Networking · 23% of the exam Why this matters Two of the three things in this lesson are diagnostic gifts. An APIPA address is a...
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IPv4 addressing, subnets, and why the mask matters more than the address
Objective 2.2 · Networking · 23% of the exam Why this matters Addressing is where candidates lose the most marks in domain 2, and almost always for the...
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DNS, DHCP and the services a network cannot run without
Objective 2.1 · Networking · 23% of the exam Why this matters If you had to pick the two services whose failure produces the most support calls, it...
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Wireless standards, frequencies and the channel plan nobody made
Objective 2.1 · Networking · 23% of the exam Why this matters Wireless is where most modern support calls start, and it is the part of networking where...
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