UDP Vs TCP (Powercert animated videos)

TCP

This article is derived from the subtitles of the following video links ：
UDP Vs TCP(Powercert animated videos)

No matter when , When a computer wants to communicate with other computers , The link between the two needs to be good and stable , To ensure that the data is correctly received .

TCP Transmission control protocol , This is TCP/IP The most commonly used protocol in the network ,TCP It is used to ensure that all data is received in sequence .

Communication between two computers requires “ good ” And reliable , To ensure that the data is correctly received .

without TCP Words , Some data may be lost Or out of order . Because if you don't TCP When browsing a web page , Your web page will be a mess , The picture will disappear , Words will be confused , Completely out of order .
Or if you download files , It may also be incomplete , Or the documents are out of order , Make the file useless , So this is TCP When it comes to use .

TCP Is a connection oriented protocol
This means that it must first confirm the dialogue between the two computers to be exchanged , So they can verify the connection before any communication , It is achieved by three handshakes .

So the first step of a computer is to send a message called SYN The news of , The computer receiving the message sends back a confirmation message , Tell the sender that it has received the message , Finally, the sender will send back a confirmation message to the receiver . When received , Data can be transmitted .

Another important thing is TCP Ensure data transmission . If a packet gets lost , Didn't arrive , that TCP Will resend

UDP

• UDP Also for sending and receiving data , The main difference is USP It's disconnected , This means that it does not establish a dialogue and does not guarantee data delivery .
• So when a computer sends their data , It doesn't really care if the data is received by another computer , That's why UDP It is called a send and discard agreement , Because it sends data regardless of what happens later
• Another thing to know , Because data transmission is not guaranteed , Less consumption ,UDP Than TCP Much faster