Name: date: 4/5/2018 CSC355 Ch-11-15_Spring2018 Short Answer 1.Describe at least

Question

Name: date: 4/5/2018 CSC355 Ch-11-15_Spring2018 Short Answer 1.Describe at least one circumstance where you would want to run commands in background mode. ANS: 2.Explain in your own words the importance of monitoring system performance. Discuss how you would gather the necessary information. Also list which elements are most important, and in your own words, explain why. 3. Linux is open source sofware. Using your own words describe the essence of open source software and how it differs from proprietary software, and explain which kind of software offers its users the most consistent experience? 4. Describe the advantages and disadvantages of password generator software. Would you recommend the use of such software for your own system? Explain why or why not.

Explanation / Answer

2)Answer:

System performance is the measure of how fast a computer executes application and system tasks. System performance may be limited by the access speed of the physical hard disks, the amount of memory available to running processes, the overall speed of the processor, or the limitations between network interfaces.

It is vital during the execution phase to monitor all aspects of the website. This includes measuring and monitoring the CPU usage and performance aspects of the various components of the website, i.e. not just the webserver, but the database and other parts aswell (such as firewalls, load balancing tools etc.)
For example, one e-tailer, whose site fell over (apparently due to a high load), when analysing the performance bottlenecks on their site discovered that the webserver had in fact only been operating at 50% of capacity. Further investigation revealed that the credit card authorisation engine was the cause of failure - it was not responding quick enough for the website, which then fellover when it was waiting for too many responses from the authorisation engine. They resolved this issue by changing the authorisation engine, and amending the website coding so that if there were any issues with authorisation responses in future, the site would not crash.
Similarly, another e-commerce site found that the performance issues that they were experiencing were due to database performance issues, while the webserver CPU usage was only at 25%, the backend db server CPU usage was 86%. Their solution was to upgrade the db server.
Therefore, it is necessary to use (install if necessary) performance monitoring tools to check each aspect of the website architecture during the execution phase.

3)Answer:

Opensource software:

Open-source software (OSS) is software that is distributed with source code that may be read or modified by users.

The OSS community generally agrees that open-source software should meet the following criteria:

As well, an open-source software license must not require the exclusion of, or interfere with, the operation of other software.

Unlike traditional software distributed in an unchangeable compiled format, open-source software is delivered with both compiled and non-compiled formats, allowing open code modification. In traditional software licenses, this privilege would be reserved for copyright holders.

Not all software developers favor the use of open-source software, but many have accepted it because it allows for quicker repair of software issues and may ultimately lead to higher quality applications.

opensource software diffrent from prpreary software:

->Propretary software is also known as the Closed Source Software means the company that develop the software owns the software and no one may duplicate it or distribute it without the companies permission.

Open Source

Proprietary software

4)Answer:

Advantages:

Chooses from high set of potential passwords.

A huge pool of high securitypasswords.

Beneficial for one time authentication for applications.

More difficult passwords not just a name and number

Disadvantage:

Can be more difficult to memorizeAnother

disadvantage of password generators is that a lot of the software require a cash fee for the applications

I would not recommend using password generator software in one of the systems I've designed.

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