Computer’s overall performance is depended on processor speed. Your computer will be much faster and more powerful when it is capable of executing more work every second or in lesser time.

I know I took more time to answer your question but this information really matters to understand how processor speed matters to function computer.

A Portable computer is a computer that comes with a keyboard and display and one which can be easily relocated or transported, although less convenient compared to a notebook.
They have lower specifications and are not well suited for full-time usage as they are less ergonomic. However, they take less space than desktop computers and come with most features found on a desktop.

CPU | Central Processing Unit, or the heart and brains of the computer.The CPU is the device that controls all of the operations.
.
| ALU | Arithmetical Logical Unit, responsible for all mathematical and logical operations.The ALU adds the binary numbers and returns the answer to the CPU, which transfers the answer to an output device.

Detailed information on the Functions of a CPU

Fetch: Each instruction is stored in memory and has its own address. The processor takes this address number from the program counter, which is responsible for tracking which instructions the CPU should execute next.

Decode: All programs to be executed are translated to into Assembly instructions. Assembly code must be decoded into binary instructions, which are understandable to your CPU. This step is called decoding.

Execute: While executing instructions the CPU can do one of three things: Do calculations with its ALU, move data from one memory location to another, or jump to a different address.

Store: The CPU must give feedback after executing an instruction, and the output data is written to the memory.

 
Done By : Jerome Sohan

https://turbofuture.com
 

Short for digital versatile disc or digital video disc, a DVD or DVD-ROM is a disc capable of storing a significant amount more data than a standard compact disc. DVDs are widely used for storing and viewing movies and other data. 

DVDs have differing capacities: 

· One of the most common DVDs is the single-sided, single-layer disc, capable of holding 4.7 GB. 

· The single-sided, double-layer disc is capable of holding between 8.5-8.7 GB. 

· The double-sided, single-layer disc is capable of holding 9.4 GB. 

· Although rare, the double-sided, double-layer disc is capable of holding up to 17.08 GB. 

The function of an input device is to communicate information to a computer or other sort of information processing equipment. Input devices are types of peripheral devices that communicate with processing units.
Ref: https://www.enotes.com › homework-help › what-function-an-input-device-...

Cloud storage is the stashing of data on hardware in a remote physical location, which can be accessed from any device via the internet. Clients send files to a data server maintained by a cloud provider instead of (or as well as) storing it on their own hard drives.

ref:  https://www.howitworksdaily.com/cloud-storage-what-is-it-and-how-does-it-work/ 
-kiron

Not all cloud hosting solutions and cloud computing services are made equal. Many cloud solutions do not provide the necessary security between clients, leading to shared resources, applications, and systems. In this situation, threats can originate from other clients with the cloud computing service, and threats targeting one client could also have an impact on other clients.

Employee negligence and employee mistakes remain one of the biggest security issues for all systems, but the threat is particularly dangerous with cloud solutions. Modern employees may log into cloud solutions from their mobile phones, home tablets, and home desktop PCs, potentially leaving the system vulnerable to many outside threats.

Inadequate data backups and improper data syncing is what has made many businesses vulnerable to ransomware, a specific type of cloud security threat. Ransomware "locks" away a company's data in encrypted files, only allowing them to access the data once a ransom has been paid. With appropriate data backup solutions, companies need no longer fall prey to these threats.

Due to the openness of a cloud computing system, phishing and social engineering attacks have become particularly common. Once login information or other confidential information is acquired, a malicious user can potentially break into a system with ease -- as the system itself is available from anywhere. Employees must be knowledgeable about phishing and social engineering enough to avoid these types of attackS.

Cloud computing systems can still contain system vulnerabilities, especially in networks that have complex infrastructures and multiple third-party platforms. Once a vulnerability becomes known with a popular third-party system, this vulnerability can be easily used against organizations. Proper patching and upgrade protocols -- in addition to network monitoring solutions -- are critical for fighting this threat.

Cloud computing security issues are not insurmountable; in fact, many of the risks above can be protected against through the use of a dedicated data protection service. Cloud data protection solutions will both protect data from loss and against cyber security threats, allowing businesses to leverage the power of the cloud without the association

https://www.cwps.com/blog/cloud-computing-security-issues

And the thing about local storage is that it is not secure! Not at all! Everyone who uses local storage to store sensitive information such as session data, user details, credit card info (even temporarily!) and anything else you wouldn't want publicly posted to Facebook is doing it wrong.

Local storage wasn't designed to be used as a secure storage mechanism in a browser. It was designed to be a simple string only key/value store that developers could use to build slightly more complex single page apps. That's it.

What's the most dangerous thing in the entire world? That's right! JavaScript.

Think about it like this: when you store sensitive information in local storage, you're essentially using the most dangerous thing in the world to store your most sensitive information in the worst vault ever created: not the best idea.

What the problem really boils down to is cross-site scripting attacks (XSS). I won't bore you with a full explanation of XSS, but here's the high level:

If an attacker can run JavaScript on your website, they can retrieve all the data you've stored in local storage and send it off to their own domain. This means anything sensitive you've got in local storage (like a user's session data) can be compromised.

https://dev.to/rdegges/please-stop-using-local-storage-1i04

local storage
Local storage wasn't designed to be used as a secure storage mechanism in a browser. It was designed to be a simple string only key/value store that developers could use to build slightly more complex single page apps.

From the flexibility they get of accessing their data anytime and from anywhere to increased cooperation and productivity, not to mention additional security, cloud storage offers a host of distinct advantages.

In the following paragraphs we shall look at different important features and benefits offered by cloud storage that makes such an attractive option for storing digital data.
https://www.go4hosting.in/blog/cloud-storage/cloud-storage-offers-better-security-and-accessibility

local storage
Local storage provides at least 5MB of data storage across all major web browsers, which is a heck of a lot more than the 4KB (maximum size) that you can store in a cookie
https://dev.to/rdegges/please-stop-using-local-storage-1i04