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CompTIA Security+ 3.1
TechKnowSurge Catalog Interactives Hard, Firm or Soft Real-Time?
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Hard, Firm or Soft Real-Time?

Harm, a dropped result, or just a pause? Sort each system as hard, firm or soft real-time.

⚑ Complete this interactive to capture a CTF flag worth 5 points.

About this interactive

In a typical computer, inputs wait in RAM until the CPU gets to them, so there can be a delay before the output. Most programs are built to expect that. Where a delay could be catastrophic, a real-time operating system keeps the time between input and output as short as processing allows. Real-time systems are classed by how much a missed deadline costs. Hard real-time: missing a deadline is a failure, and it can cause harm. The lesson's examples are an airplane's controls and a car's brakes. Firm real-time: a result that arrives late is worthless and thrown away, but occasional misses are tolerated. The lesson's example is a phone call. Soft real-time: a late result is still used, just with lower quality. The lesson's example is streaming a movie, where buffering covers the delay. To sort a card, ask what happens to the late result.

What you'll learn

Aligned to

CompTIA Security+
3.1 Compare and contrast security implications of different architecture models.

Key terms

Real-time Operating System
RTOS
Real-time Operating System is an OS designed for deterministic, time-critical embedded applications; RTOS security is vital in industrial, medical, and automotive systems where vulnerabilities can have physical consequences.
Hard Real-Time
A real-time classification where missing a timing deadline is completely unacceptable and can result in catastrophic failure, such as in flight control systems.
Firm Real-Time
A real-time classification where occasional missed deadlines degrade system usefulness but do not cause catastrophic harm, such as in voice communication systems.
Soft Real-Time
A real-time classification where timing deadlines are desirable but the system remains functional if they are occasionally missed, such as in media streaming.

Topics

Interactive Categorize

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