100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
NCOI IT INFRASTRUCTUUR - H4 AVAILABILITY CONCEPTS EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED GRADED A+ LATEST UPDATED $9.99   Add to cart

Exam (elaborations)

NCOI IT INFRASTRUCTUUR - H4 AVAILABILITY CONCEPTS EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED GRADED A+ LATEST UPDATED

 9 views  0 purchase
  • Course
  • Institution

NCOI IT INFRASTRUCTUUR - H4 AVAILABILITY CONCEPTS EXAM QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED GRADED A+ LATEST UPDATED Is 100% availability possible? No this is not possible. no matter how much effort is spent on creating high available infrastructures, there is always a chance of downtime ...

[Show more]

Preview 2 out of 15  pages

  • July 23, 2024
  • 15
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers
avatar-seller
NCOI IT INFRASTRUCTUUR - H4 AVAILABILITY CONCEPTS EXAM

QUESTIONS WITH COMPLETE SOLUTIONS VERIFIED GRADED

A+ LATEST UPDATED


Is 100% availability possible?

No this is not possible. no matter how much effort is spent on creating high available

infrastructures, there is always a chance of downtime

Can availability be calculated upfront?

No, it can only be reported on afterwards, when a system has run for some years. But

much knowlegde and experience is gained over the years on how to develop high

available systems

What can be used to achieve higher availability?

- Failover

- Redundancy

- Structured programming

- avoiding Single Points of Failure (SPOF)

- implementing sound systems management

How is the availability of a system usually expressed?

as a percentage of uptime in a given time period (usually 1 year or 1 month)

What are typical requirements for availability?

, 99,8% or 99,9% for a full IT system. To meet this, the availability of the underlying

infrastructure must be much higher (>99,99%)

What is carrier grade availability?

99,999% availability. (originates from telecommunication systems that needed

extremely high availability). Higher than this is very uncommon (and almost impossible)

What are other requirements on the availability?

The max downtime per year for example should not occur in 1 event, nor should a short

downtime occur very often. Therefore it is good to agree on the max. frequency of

unavailability. You can use a frequency table. (see blz 54)

What are the factors involved in calculating availability?

- Mean Time Between Failures (MBTF)

- Mean Time To Repair (MTTR)

What is MTBF (mean time between failures)?

The average time that passes between failures

What is MTTR (mean time to repair)?

The time it takes to recover from a failure

what does the word 'mean' mean in MBTF and MTTR?

It means that the numbers expressed by MBTF and MTTR are statistically calculated

values

The MTBF is expressed in....?

hours (how many hours will the component or service work without failure)

How do manufacturers test the MTBF for their components?

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller NurseAdvocate. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $9.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

80461 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$9.99
  • (0)
  Add to cart