Glossary 61
• Port Forwarding — A process that allows remote devices to
connect to a specific computer within a private LAN.
• Port Number — A 16-bit number used by the TCP and UDP
protocols to direct traffic on a TCP/IP host. Certain port
numbers are standard for common applications.
• Protocol — A standard that enables connection,
communication, and data transfer between computing
endpoints.
• Proxy — A firewall mechanism that replaces the IP address
of a host on the internal (protected) network with its own IP
address for all traffic passing through it.
• Router — A device that directs traffic from one network to
another.
• SIM — Subscriber Identification Module. Found in LTE and
GSM network technology, the SIM is a card containing
identification information for the subscriber and their account.
The SIM card can be moved to different devices.
• SSID — Service Set IDentifier. The name assigned to a Wi-Fi
network.
• TCP/IP — Transmission Control Protocol/Internet Protocol. The
set of communications protocols used for the Internet and
other similar networks.
• USB — Universal Serial Bus. A connection type for computing
device peripherals such as a printer, mobile modem, etc. USB
connectors may be used for data transfer or charging.
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