computer science

IT network assurance

IT network assurance is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand IT network assurance rather than just read about it. In short: IT network assurance quantifies risk from an IT network perspective, based on analysis of network facts. Examples could be identifying configuration errors in network equipment, which may result in loss of connectivity between devices, degradation of performance or network outages.

Key takeaways

IT network assurance belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect IT network assurance to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of IT network assurance from memory before moving on to harder problems.

Reference excerpt

IT network assurance quantifies risk from an IT network perspective, based on analysis of network facts. Examples could be identifying configuration errors in network equipment, which may result in loss of connectivity between devices, degradation of performance or network outages. Relevant facts about the network that could be analyzed would include not only network configuration files, but current network state, network traffic analysis, error logs or performance data. Network Assurance is closely related to the topic of Service assurance, which is primarily for service providers and telecommunication networks to ensure the proper level and quality of network service are delivered to customers. IT network assurance is generally for corporate networks and enterprise IT departments. Network assurance involves the engineering process of formal verification, which specifically contrasts with design testing. Verification of network design compares the policy requirements of the network with the actual implementation under all conditions, rather than testing specific test scenarios under a finite number of conditions. A complement to IT application-level security and data-level security solutions, and a sub-set of Network management, Network assurance measures the impact of network change on security, availability, and compliance. Network assurance helps companies keep policies and defences correctly implemented during times of rapid network change. It also helps organizations prioritize remediation efforts and validate network policies and controls. Colleges are now offering classes specifically for this Network Management sub-domain under IT Forensics. The capabilities of a network assurance solution also overlap closely with the technology category of intent-based networking, which also compares network intent and required policies with actual network designs and configurations to provide assurance of network functions.

Vendors IP Fabric introduced a software platform in 2017 which seeks to improve the reliability and security of enterprise networks through continuous network assurance. Cisco introduced a network assurance solution in January 2018 called Network Assurance Engine. Veriflow Systems is another vendor that claims to provide network assurance capabilities in its platform through continuous network verification. All three of these systems rely on a mathematical model of the network, rather than monitoring of live network traffic, to analyze and verify behavior in comparison to network intent and desired policies.

See also Gordon–Loeb model for cyber security investments

References

Worked examples

Example 1 — a first encounter with IT network assurance

Start with the simplest possible case. Write down what IT network assurance claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to IT network assurance before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about IT network assurance ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of IT network assurance

In research: IT network assurance appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses IT network assurance in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: IT network assurance is common in secondary-school and first-year university syllabi. It links to neighbouring topics Computing stubs, Network management, Quality assurance, so understanding it makes those chapters shorter.
In everyday life: Look for IT network assurance outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study IT network assurance in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what IT network assurance means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain IT network assurance out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is IT network assurance in simple terms?

Why does IT network assurance matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study IT network assurance?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on IT network assurance.