Data Communication


Data Communication
Data communication is the exchange of information(or data) between two or more devices by some transmission medium such as wire cable. There are following components of data communication:-
1.      Message- The message is the data or information to be communicated. Some forms of data are text, numbers, pictures, audio, video etc.
2.      Sender- The sender is the device that sends the information.  It can be telephone handset, mobile, computer etc.
3.      Receiver- The receiver is the device that receives the message. It can be a computer, mobile, telephone, television etc.
4.      Transmission Medium- The transmission medium is the physical path by which a message travels from sender to the receiver. It can be twisted pair wire, coaxial cable, fiber optic cable, radio waves etc.
5.      Protocol- A protocol is a set of rules that govern the data communication.  It is  an agreement between the communicating devices. Without a protocol, two devices may be connected but not communicating, just as a person speaking Hindi can not be understood by a person who speaks only English.    

Comments

Post a Comment

Popular posts from this blog

Program for calculating Simple Interest using the concept of Default Arguments

//Program for Interest calculation using the concept of default arguments #include<iostream.h> #include<conio.h> void main() { float amount, principal; int time; float interest(float p, int n, float r=0.15); cout<<"Program for simple interest calculation"<<endl; cout<<"Please enter principal amount:"; cin>>principal; cout<<"Please enter Time: "; cin>>time; amount=interest(principal, time); cout<<"\nThe amount is:"<<amount; cout<<"\nPress any key to continue..."; getch(); } float interest(float p, int n,float r) { return (p+((p*r*n)/100.0)); }
Read more

Program: Maximum number in three numbers in visual basic

Image
Program: Maximum number in three numbers User Interface   Coding: Function calMax(x, y, z As Variant) If x > y And x > z Then calMax = Str(x) ElseIf y > x And y > z Then calMax = Str(y) ElseIf z > x And z > y Then calMax = Str(z) End If End Function Private Sub Command1_Click() Dim a, b, c a = Val(Txt_Num1.Text) b = Val(Txt_Num2.Text) c = Val(Txt_Num3.Text) Lbl_Display.Caption = calMax(a, b, c) End Sub Private Sub Label5_Click() End Sub Private Sub Form_Load() End Sub
Read more

Program for Checking whether the given number is Palindrome or not

Palindrome means a number which remains same if positions of its digits is reversed i.e., 1221 #include<stdio.h> #include<conio.h> void main() { int n,digit,rev=0,num; printf("enter the number"); scanf("%d",&num); n=num; do { digit=num%10; rev=rev*10+digit; num/=10; }while(num!=0); printf("reverse number is=%d\n",rev); if(n==rev) { printf("number is palindrome"); } else { printf("number is not palindrome") ; } getch(); }
Read more