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bytebar

About bytebar

  • ByteBar — no-fluff IT certification study guides.
  • Cheatographer since 14 September, 2026.

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  • 13 Cheat Sheets
  • 27 Cheat Sheet Pages
  • 4,930 Cheat Sheet Views

Cheat Sheets By bytebar

2 Pages
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The must-know acronyms and key terms for CompTIA Security+ (SY0-701) — one-page rapid review.
7 Oct 26
1 Page
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What the top IT certs pay in 2026 — approximate US salary ranges, exam costs, and who each cert is for, one page.
7 Oct 26
1 Page
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The core SAA-C03 services with exam framing — what each service is and when the exam asks about it, one page.
7 Oct 26
9 Pages
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The commands, tables, and exam traps from the CCNA 200-301 blueprint — subnetting, VLANs, STP, OSPF, ACLs, NAT, wireless, and automation on one page.
24 Sep 26, updated 1 Oct 26
2 Pages
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Core AWS services for the CLF-C02 exam: compute, storage, databases, networking, security, and pricing — in one glanceable reference.
24 Sep 26, updated 25 Sep 26
2 Pages
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High-yield NCLEX-RN lab values with normal ranges, critical values, and what to do — one-page rapid review.
20 Sep 26, updated 21 Sep 26
1 Page
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TCP vs UDP, side by side: reliability, speed, headers, the three-way handshake, and real-world use cases — when to use each and why the exam loves asking. Answer the classic comparison questions with confidence. More free study resources at bytebarhq.com.
14 Sep 26, updated 20 Sep 26
1 Page
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Every major Wi-Fi standard from 802.11a to Wi-Fi 7 (802.11be): frequencies, max speeds, channel widths, and key features in one glanceable reference. Perfect for Network+ wireless topics and real-world network planning. More free study resources at bytebarhq.com.
14 Sep 26, updated 20 Sep 26
2 Pages
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The essential Linux commands for files, permissions, networking, processes, and package management — with syntax and the flags you'll actually use. Handy for CompTIA Linux+ prep, sysadmin work, and daily terminal life. More free study resources at bytebarhq.com.
14 Sep 26, updated 20 Sep 26
1 Page
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The 7-layer OSI model in one clear, exam-ready reference: each layer's name, function, key protocols, and devices — plus how data flows down the stack from application to physical. A must-have for Network+ and CCNA candidates. More free study resources at bytebarhq.com.
14 Sep 26, updated 20 Sep 26
2 Pages
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The essential network ports every IT pro needs at their fingertips: HTTP/HTTPS, DNS, DHCP, SSH, FTP, SMTP, RDP, and more — with port numbers, TCP vs UDP, and what each service actually does. Built for CompTIA A+, Network+, and Security+ exam prep. More free study resources at bytebarhq.com.
14 Sep 26, updated 20 Sep 26
2 Pages
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Key PowerShell cmdlets for Windows administration: files, processes, services, networking, and Active Directory basics — with practical examples. Built for Windows admins and certification study. More free study resources at bytebarhq.com.
14 Sep 26, updated 20 Sep 26
1 Page
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14 Sep 26, updated 21 Sep 26