What is the history of telecommunication​

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Answer 1
Answer:

Answer:

The history of telecommunication began with the use of smoke signals and drums in Africa, Asia, and the Americas. In the 1790s, the first fixed semaphore systems emerged in Europe. However, it was not until the 1830s that electrical telecommunication systems started to appear.

Explanation:

Answer 2
Answer:

Answer:

The history of telecommunication began with the use of smoke signals and drums in Africa, Asia, and the Americas.

Explanation:


Related Questions

. One of the vulnerabilities the Morris worm used was a networking service called finger. The purpose of the finger service is to:A. report which device drivers a computer usesB. determine which ports are open on a computerC. report the status of individual computer usersD. determine which operating system is running on a computer
You use utility software to_____. Select all that apply.A play video games B reformat a hard disk drive C manage fonts on a computer D write and edit documents
So, I have strict parents & need help, if u don’t know how to fix this after u read it, leave. I don’t want u getting points for nothing I’m deleting ur answer if u do it for points. Anyways, I want to get Spotify on my phone, but it says “Enter the password for (my email)”. How do I sign back into it if I don’t know the password. My dad has the password, but I don’t want to get in trouble for stealing his phone to fix mine. Please help, I’ll give the brainliest!
The utilization of a subset of the performance equation as a performance metric is a pitfall. To illustrate this, assume the following two processors. P1 has a clock rate of 4 GHz, average CPI of 0.9, and requires the execution of 5.0E9 instructions. P2 has a clock rate of 3 GHz, an average CPI of 0.75, and requi res the execution of 1.0E9 instructions. One usual fallacy is to consider the computer with the largest clock rate as having the largest performance. Check if this is true for P1 and P2.
How many generations of computer languages have there been since the middle of the 20th century?

An analyst receives an alert from the SIEM showing an IP address that does not belong to the assigned network can be seen sending packets to the wrong gateway. Which of the following network devices is misconfigured and which of the following should be done to remediate the issue? A. Firewall; implement an ACL on the interface B. Router; place the correct subnet on the interface C. Switch; modify the access port to trunk port D. Proxy; add the correct transparent interface

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Answer: (A)  Firewall; implement an ACL on the interface

Explanation:

 According to the question, for re-mediate the issue firewall should be implemented the ACL (Access control list) on the given interface. The access control list is one of the type of logic which selectively give permission or deny the number of packet in the system which to through the interface.

Firewall is the type of device that basically examine the traffic in the network system and also make several decisions in the system. ACL is the set of rule which mainly define the route of the packet in the router interface state.

To define constructors and member functions outside of a class's original scope, the operator can be used.

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Answer: Scope resolution operator(::)

Explanation: A member function and the constructor can be called within the function easily but for the execution of the these components outside the class , a special operator is required to call the functions. The scope resolution operator(::) preceding with the name of class is thus used for defining of the function outside class.This operator maintains the cope of the function and constructor outside the class.

Corey set up his presentation for delivery to his team.

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Answer:

If Corey wants to control the pacing of his presentation, he should adjust his playback settings. In the playback settings, he should select the default setting under "type;" this will allow him to change slides anytime. He should also click the check box under "options" that says "Change slides manually" so he can simply click on the slide whenever he is ready to move on to another slide.

Explanation:

If you don't like that answer, here's another one:

Corey knew he would need a lot of time to explain each point and that his team members would have lots of comments and questions. The best way that Corey should set up his slide show would be to make sure that he has an outline. Also, there should only be one thought per slide (never mix it). It has to be taken into account that he should have fewer words and more images/graphs.

Write a java program that use multiple arrays This is a simple array program which does not use an "external class & demo program" If you wish, you may break it down into methods, but that is not required. a. Set up 4 arrays which hold data about 6 items you want to sell: [make them up] int[ ] itemnum int[ ] quantity double[ ] price double[ ] sales b. Set up loops to load the itemnum, quantity and price arrays c. Set up another loop to calculate values for the sales array. [= price * quantity] d. Set up another loop to print the item number and sales amount for each transaction . e. Set up another loop to calculate the total sales of all 6 items f. print the total sales amount

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Answer:

Explanation:

import java.util.Array;

public class Items{

public static void main (String {} args){

// a. Set up 4 arrays which hold data about 6 items you want to sell

int [] itemnum = new int[](1,2,3,4,5,6);

int [] quantity = new int[](500,200,350,100,270,300);

double [] price = new double [](10000, 50000,30000, 22000, 26000,100200);

double[] sales = new double [6];

//b. Set up loops to load the itemnum, quantity and price arrays

for(int I=0;I<6;I++)

{

System.out.println("Item "+itemnum[I]);

System.out.println("Item "+quantity[I]);

System.out.println("Item "+price[I]);

}

//c. Set up another loop to calculate values for the sales array.

for(int j=0;j<6;j++)

{

sales[j] = quantity[j] * price[j];

}

//d. Set up another loop to print the item number and sales amount for each transaction

for(int k=0;k<6;k++)

{

System.out.println("Item Number "+itemnum[k]);

System.out.println("Sales Amount "sales[k]);

}

//e. Set up another loop to calculate the total sales of all 6 items

double totalsales = 0;

for(int l=0;l<6;l++)

{

totalsales+=sales[l];

}

//f. print the total sales amount

System.out.print("Total Sales: "+totalsales);

}

}

The sql standard prescribes three different types of __________ operations: left, right, and full.

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The sql standard prescribes three different types of JOIN operations: left, right, and full.
 
The LEFT [OUTER] JOIN yields all rows with matching values in the join columns, plus all ofthe unmatched rows from thelefttable.
The RIGHT [OUTER] JOIN yields all rows with matching values in the join columns, plus all ofthe unmatched rows from therighttable.
 The FULL [OUTER] JOIN yields all rows with matching values in the join columns, plus all theunmatched rows from both tables named in the FROM clause.

What is probably the most revolutionary innovation since the printing press?

Answers

Answer:

The Internet

Explanation:

Why? The internet has done twice if not thrice what the printing press has done. The printing press allowed for dissemination of information and knowledge to the population through its mechanical movable printing capability and speed of book publishing. However its reach was highly limited by the physical attributes of the machines and having to transfer books and papers in spreading them to certain destinations. This limitation has been eliminated by the internet as one is able to receive a book written today in seconds and not physically but through electronic means. In other words, information need not be transferred physically, also accessbility and cost of getting information has been highly improved with the internet.