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Elena L [17]
2 years ago
11

What is the difference between referential and entity integrity

Computers and Technology
1 answer:
Lisa [10]2 years ago
3 0

Answer:

Explanation:

Referential integrity is the state in which all values of all foreign keys are valid. Referential integrity is based on entity integrity . Entity integrity requires that each entity have a unique key.

Hope this helped and have a good day

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sasho [114]

Answer:

Cool

Explanation:

7 0
3 years ago
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My home PC has IP address 192.168.1.22 and connects to the Internet through a NAT router. Assume I am downloading a web page fro
alekssr [168]

Answer and Explanation:

There are three sections to the inquiry.  

1. what occurs inside the PC or host when a bundle is produced by an application.  

2.how it goes from one host that is a source to another host that is a goal with numerous switches sitting in the middle.  

3.what goes inside goal have when it gets a parcel on the system.  

how about we examine individually  

Handling bundle at source machine:  

The application creates a bundle to be sent on the system and sends it to the layer beneath.  

The following layer is known as a vehicle layer which oversees start to finish correspondence between two machines. The convention utilized can be TCP or UDP. What is the contrast between these two conventions is another subject by and large.  

When the parcel is framed at the vehicle layer, it is sent to the system layer which includes source and goal IP in the bundle. A most significant field which is included at IP or system layer is Time To Live (TTL) which is utilized by middle switches/changes to choose if a parcel should be sent or not. (How goal IP is found?)  

After the system layer, the parcel arrives at the information connection or MAC layer, where the source and goal MAC address of machines are included. We will perceive how these fields change between each two neighbors. (How goal MAC is found?)  

The information interface layer pushes this bundle to the physical layer where it is sent as a flood of "0" and "1" on the physical medium accessible.  

Preparing a bundle at switch:  

Steering  

There are three cases which may happen when the switch investigates the directing table for goal IP  

1. On the off chance that there is a section relating to goal IP, we get the interface name the parcel ought to be sent to.  

2. On the off chance that there is no immediate passage, at that point IP is changed over into organize IP utilizing the veil and afterward checked once more. It ought to be noticed that the longest prefix match to locate the best sending interface.  

3. In the case of nothing matches, at that point the switch just advances it to the default goal designed.  

Sending  

Epitome  

Preparing parcel at the goal have  

The parcel is gotten at arrange card, physical layer, which produces a hinder to CPU and CPU peruses bundle in,  

At the information connect layer, goal MAC address is verified whether the parcel is bound to this machine, If indeed, the bundle is sent up to the system layer.  

At the IP layer, parcel approval like checksum confirmation, and so on is done and afterward gave to the applicable vehicle layer.  

Transport later at that point gives it to the fitting port with the goal that it arrives at the right application.

5 0
3 years ago
While troubleshooting a network connection problem for a coworker, you discover the computer is querying a nonexistent DNS serve
tatuchka [14]

Answer:

nslookup ifconfig.

Explanation:

The nslookup is used a number of times by network admins to troubleshoot DNS related problems. In addition, this command finds IP addresses and name servers of hosts. This utility command queries the DNS database tables from every host in a network. It then determines the host name and issues an IP. It sort of converts your domain name into an IP addresses. This command combined with ifconfig finds the correct DNS servers and assigns the correct DNS server IP.

6 0
3 years ago
Write a C++ Programm in which inheritance is used
geniusboy [140]

Answer:

// C++ program to demonstrate inheritance

#include <iostream>

using namespace std;

// base class

class Animal {

  public:

   void eat() {

       cout << "I can eat!" << endl;

   }

   void sleep() {

       cout << "I can sleep!" << endl;

   }

};

// derived class

class Dog : public Animal {

  public:

   void bark() {

       cout << "I can bark! Woof woof!!" << endl;

   }

};

int main() {

   // Create object of the Dog class

   Dog dog1;

   // Calling members of the base class

   dog1.eat();

   dog1.sleep();

   // Calling member of the derived class

   dog1.bark();

   return 0;

}

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What is the HTML tag used to define a block of content?<br> O <br> O class<br> O #id<br> O
allsm [11]
Are there any other options
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