What does output interface mean?

The output interface refers to the output interface, which refers to the output interface mode of the switcher, usually a BNC plug or a composite video interface; for the matrix switcher, because it selects two or more from multiple signal sources Output to different display devices, so the matrix switcher has multiple input interfaces and multiple output interfaces.

The operating environment of this article: windows7 system, DELL G3 computer

output, English words, nouns, transitive verbs, when used as nouns, it means "Output, output; output; production." When used as a transitive verb, it means "output".

The output interface refers to the output interface mode of the switcher, usually a BNC plug or composite video interface. For matrix switchers, because it selects two or more types of signal sources to output to different display devices, the matrix switcher has multiple input interfaces and multiple output interfaces.

The most common output interfaces now include: VGA interface, DVI interface, S-video, and HDMI.

Extended information

We know that a host with an IP address can provide many services, such as Web services, FTP services, SMTP services, etc. These The service can be implemented entirely through 1 IP address. So, how does the host distinguish between different network services? Obviously you cannot rely solely on IP addresses, because the relationship between IP addresses and network services is a one-to-many relationship. In fact, different services are distinguished by "IP address and port number".

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

The role of ports in intrusion

Someone once compared the server to a house and the ports to doors leading to different rooms (services). If you don’t consider the details, this is a Not a bad metaphor. If an intruder wants to occupy this house, he must break in (physical intrusion is another matter). So for the intruder, it is important to know how many doors are opened in the house, what kind of doors they are, and what is behind the door. It's important.

Intruders usually use a scanner to scan the ports of the target host to determine which ports are open. From the open ports, the intruder can know roughly what services the target host provides, and then guess what services may exist. Vulnerabilities, so port scanning can help us better understand the target host. For administrators, scanning the open ports of the local machine is also the first step to take security precautions.

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