A group of computers that are interconnected in order to share information or documents is called a ____

Each row in a database is a set of unique information called a(n) (A.)table,(B.)record,(C.)object,(D.)field

sashaice [31]

Answer:

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4 0

3 years ago

Read 2 more answers

Explain SATA peripheral bus operation?

grin007 [14]

Peripheral Bus is not associated with the SATA function on a computer as they are not universal to each other. If you can go more into context, that would be great.

3 0

3 years ago

Consider the following general code for allowing access to a resource:

Margaret [11]

Answer:

a) The code allows access even when IsAccessAllowed(...) method fails.

b) Either use If

(dwRet = ACCESS_ALLOWED)

or use

if (dwRet == NO_ERROR)

to avoid flaw

Explanation:

Lets first see what the code chunk does:

DWORD dwRet = IsAccessAllowed(...);

if (dwRet == ERROR_ACCESS_DENIED) {

// Security check failed.

// Inform user that access is denied.

} else {

// Security check OK.

}

In the given code, DWORD is basically a data type for double word type integers and this is defined in windows.h

So there is DWORD type variable dwRet that is assigned a method calls.

The method is IsAccessAllowed() which checks if the access is allowed to user.

if (dwRet == ERROR_ACCESS_DENIED) condition basically checks if the value of DWORD type variable dwRet is equal to ERROR_ACCESS_DENIED

If this condition evaluates to true then the security checks fails and user is informed via some message or action that the access is denied. But when the if condition evaluates to false then the else part executes which allows access.

So basically this chunk of code checks if the error ERROR_ACCESS_DENIED is returned.

Now the flaw in this program is what if the method IsAccessAllowed() by any reason. The reasons can be system failure or the memory failure. In memory failure case for example, the system returns out of memory error. So this means that the error is not ERROR_ACCESS_DENIED. Instead it is out of memory error. So in such a case the user is allowed access as the if condition evaluates to false and else part executes. So if any other error is produced due to some reason like mentioned above, then user has unrestricted access.

This shows that the doe should not check for the failure or rely on checking ERROR_ACCESS_DENIED to allow access but instead it should check for success. Code should only give access privilege if access is allowed successfully or no error is produced.

So to avoid this flaw the code is altered as:

DWORD dwRet = IsAccessAllowed(...);

If (dwRet = ACCESS_ALLOWED) {

//Security check OK.

} else {

//Security check failed.

//Inform user that access is denied.

}

This will only allow access if ACCESS_ALLOWED evaluates to true and success is checked instead of failure here

You can also alter the if condition as:

If (dwRet = No_Error)

or

If (dwRet = 0)

The above if conditions checks if the access is allowed or if no error is produced. Only then it will allowed access otherwise not. So the access check is a success is checked first and failure (for any reason). The user is allowed access only if there is no error otherwise user is not allowed access.

6 0

3 years ago

The 6 steps for PowerPoint competency from the TED talk in the module "How to Avoid Death by PowerPoint."?

KIM [24]

Answer:

1. Do some presentation preparation work

2. Set the right tone and end on a high note.

3. Create sleek and stylish slides.

4. Get your audience to focus.

5. Its all about you.

Explanation:

1. Do some presentation preparation work:

A good presentation begins, not with slides, but with a pencil and paper. Research your audience’s background, interests and capabilities. What do they already know, for instance, and what can they learn from you?

2. Set the right tone and end on a high note:

You have no more than 30 seconds to secure your audience’s attention. So, what attention-grabbing opener will you use?

Visual communications expert Curtis Newbold suggests “a fascinating quote; an alarming or surprising statistic; asking your audience a question; telling a relevant and funny joke… an imaginary scenario; or a demonstration''.

3. Create sleek and stylish slides:

Once you have your story down, you can start to design your slides.

Before you do, it’s important to think about the practicalities. Will they, for instance, be displayed Widescreen with a 16:9 ratio? Or Standard with 4:3? This might seem like a small detail, but it can make a huge difference in terms of visual impact.

4. Get your audience to focus:

The most important thing is to grab your audience’s attention straight away – and then maintain it! You want your audience to go away having learned something. So, make it as easy as possible for people to grasp your message “from the off”!

5. Its all about you:

Finally, remember that, ultimately, it’s you that the audience should be paying attention to, not your slides!

PowerPoint can be used to create great visual aids, but the success of your presentation is determined by the way you deliver them. So, tell your story with a confident, compelling physical presence, and master it by rehearsing it 10 to 15 times.

6 0

3 years ago

A computer is not connecting to certain network devices properly. the ip address information is as follows: ip address: 192.168.

larisa [96]

192.168 suggests class C networks which have a 24 bit netmask (255.255.255.0) but you haven't provided enough info, like the netmask of a working machine, to be definite.

3 0

3 years ago

A group of computers that are interconnected in order to share information or documents is called a _____.