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Chapter 6 Glossary
ping
A command used to check the connection status with other network devices. Generally, it is judged
that there is a problem in the network route when there is no response to ping requests, and the
ping command is used for finding out the cause of the problem.
PoE (Power over Ethernet)
A technology to supply electricity using an Ethernet cable.
Port
A communication contact number for network communication. When multiple services are provided
by one network device, allotting an individual port number for each service allows the device to
provide multiple services simultaneously.
Resolution
The LCD panel consists of numerous pixels of specified size, which are illuminated to form images.
This monitor consists of 1920 horizontal pixels and 1080 vertical pixels. At a resolution of 1920 ×
1080, all pixels are illuminated as a full screen (1:1).
Subnet Musk
A subnet mask is a numeric value where the network address part identifying the subnet can be
specified in an IP address.
(Subnet: a divided network when controlling a large network by dividing into multiple networks)
TCP/IP (Transmission Control Protocol/Internet Protocol)
The TCP/IP is one of the network protocols for network communication. Using the TCP/IP protocols
allows communication in various OSes.
traceroute
A command used to check the routes used to connect with other network devices.
Unicast
A network communication format in which individual network devices perform one-to-one
communication. Whereas an image quality that is suitable for each individual network device can
be transmitted, the downside to this format is that transmitting devices place a high load on the
network.
