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Editor to share with you what the output interface refers to, I believe that most people do not know much about it, so share this article for your reference, I hope you will learn a lot after reading this article, let's go to know it!

The output interface refers to the output interface of the switch, which is generally BNC plug or composite video interface. For the matrix switch, because it outputs two or more kinds of signal sources to different display devices, the matrix switch is multi-input interface and multi-output interface.

Operating environment of this article: windows7 system, DELL G3 computer

Output, an English word, noun, transitive verb, when used as a noun, means "output, output; output; production". As a transitive verb, it means "output".

The output interface refers to the output interface mode of the switch, which is generally BNC plug or composite video interface. For the matrix switch, because it outputs two or more kinds of signal sources to different display devices, the matrix switch is multi-input interface and multi-output interface.

Now the most common output interfaces are: VGA interface, DVI interface, S terminal, HDMI.

Extended data

We know that a host with an IP address can provide many services, such as Web services, FTP services, SMTP services, etc., which can be implemented through an IP address. So, how do hosts distinguish between different network services? Obviously you can't rely solely on IP addresses, because the relationship between IP addresses and network services is an one-to-many relationship. Different services are actually distinguished by "IP address + port number".

It should be noted that ports do not correspond one to one. For example, when your computer visits a WWW server as a client, the WWW server uses port "80" to communicate with your computer, but your computer may use a port like "3457".

The role of Port in intrusion

Someone once compared a server to a house and a port to a door to different rooms (services), which is a good metaphor without considering the details. If the intruder wants to occupy the house, he is bound to break into the house (another physical invasion), so it is very important for the intruder to know how many doors the house has opened, what kind of door is open, and what is behind the door.

Intruders usually use scanners to scan the ports of the target host to determine which ports are open. From the open ports, the intruder can know what services the target host provides, and then guess the possible loopholes. Therefore, port scanning can help us better understand the target host, and for administrators, scanning the local open port is also the first step in security precautions.

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