Tech Docs
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Learn how C variables and fundamental types work, including declarations, initialization, integer and floating-point types, char, const, sizeof, limits, and portable type choices.
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Learn how C variables connect names to typed memory: char, int, signed and unsigned integers, literals, sizeof, limits.h, binary representation, portability, compiler warnings, exercises, and troubleshooting.
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Learn how Windows services work, what the Service Control Manager does, how startup types and dependencies behave, and how to inspect services safely with services.msc, sc.exe, and PowerShell.
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OSFEC.007 teaches I²C bus engineering: addressing, open-drain signaling, pull-up resistor sizing, clock stretching, repeated START, bus recovery, and firmware diagnostics.
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OSFTC.007 teaches safe SPI NOR flash diagnostics: identify the device, confirm voltage, read identification data, save repeatable backups, inspect protection, and verify authorized service work.
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IBM and Red Hat say Lightwell has fixed more than 400 previously unknown Java security flaws and opened its dependency-remediation clearinghouse.
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Learn inter-VLAN routing at the technician level: router-on-a-stick, 802.1Q subinterfaces, Layer 3 switch SVIs, default gateways, routing verification, and troubleshooting.
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A foundational networking lesson on 802.1Q VLAN trunks, tagging, native VLANs, allowed VLANs, verification, and troubleshooting.
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Python logging filters let an application decide which records reach a logger or handler. After OSPython.032: Custom Log Formatting, the next practical step is learning to select records without changing their display format. A filter can enforce a precise policy, such as accepting records from one subsystem or excluding known-noisy messages. Learning objectives Explain where…
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OSFOEC.007 explains fiber nonlinearities in optical networks: Kerr effect, SPM, XPM, FWM, SBS, SRS, aggregate WDM power, effective area, and launch-power optimization.
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Learn coherent optical transmission engineering from the ground up: I/Q modulation, QPSK and QAM, dual polarization, coherent receivers, DSP, OSNR, FEC, and the capacity-versus-reach tradeoff.
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OSFOTC.007 teaches fiber cable installation and routing: bend radius, pulling tension, conduit and tray handling, figure-eight staging, slack, strain relief, labeling, inspection, and acceptance testing.
