--- title: "Network / IP glossary" description: "Technical terms used when setting up your sensor network." url: https://help.flow-insight.com/en/articles/228-network-ip-glossary collection: "Sensors & Data Sources" updated: 2026-08-06 language: en alternates: [ja] --- # Network / IP glossary Technical terms used when setting up your sensor network. The technical terms you may be asked about when setting up your sensor network, and what each one means. Confirming and sharing these values in advance helps the installation go smoothly.

Term

What it is

Example

Store router / HUB / PoE install location

Measurement data is sent to the Flow server through the store's existing internet connection, via the store router. The measurement device connects to that router over PoE — let us know the router's install location in advance.

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Router / HUB port number

The open port number used to connect to the store network. If none is specified, an available port is used.

NTT ABC-DFG, port 4 or later

Router / HUB model

The brand and model of the store router/HUB, and how many open LAN ports it has.

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DNS

The DNS setting used for the network connection. (reference)

8.8.8.8

Default gateway

The IP address of the device that relays data when the destination route is unknown. (reference)

192.168.1.1

Subnet mask (global)

Subnet info checked alongside the global IP address. Required if installing an IP camera solution.

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IP address range (local)

The range of local IP addresses to assign, one per measurement device.

192.168.1.10-50

Subnet mask (local)

The subnet mask setting used for the network connection. (reference)

255.255.255.0

DDNS

Only needed if the install requires port mapping, or if the global IP address is dynamic. Not needed for a standard Traffic counter install. (reference)

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Communication port

The TCP port that needs to be allowed through the firewall. (reference)

TCP 80 allowed

Global IP address

Checked for security purposes. Required if installing an IP camera solution. (reference)

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## If the router has no open LAN port If the store router's LAN ports are all in use, we handle it one of two ways: - If our PoE HUB can be used: we temporarily unplug the LAN cable from a laptop or multifunction printer at the store router, and connect our PoE HUB instead. - If our PoE HUB can't be used: during the connection and function check, we temporarily unplug the LAN cable from a laptop or multifunction printer at the store's existing HUB. After the check, we reconnect that device and leave with the measurement system's LAN cable unplugged. Once you arrange an open LAN port, we'll ask for your help connecting the measurement system's LAN cable. * * * If you have any questions or feedback, please contact support at [support@flow-solutions.com](mailto:support@flow-solutions.com).