ITF+ Using Computers L1-5

A worldwide network of networks based on the TCP/IP protocol.

• Internet
• LAN
• Intranet
• Extranet

This network of networks is not owned by a single company or organization. At the heart of this are high-speed data communications lines between major host computers, consisting of thousands of commercial, government, educational, and other computer systems that route data and messages.

• Extranet
• Internet
• Intranet
• Local Area Network

A small coin "cell" is also used in a computer to power CMOS RAM.

• Adapter
• Battery
• Power Supply
• Power Adapter

Power source for a portable computer, typically a rechargeable Lithium-ion (Li-ion) type.

• Power Adapter
• PoST (Power-On Self-Test)
• Battery
• Power Supply

This network can be used for voice and data communications. Data communications are divided into 2G (GSM; up to about 14 Kbps), 2.5G (GPRS, HSCSD, and EDGE; up to about 48 Kbps), 3G (WCDMA; up to about 2 Mbps), 4G (LTE; up to about 150 Mbps), and 5G (up to 1 Gbps).

• Cell Phone
• Intranet
• Embedded System
• Internet

Mobile telephony works through a series of base station transmitters (cells) that connect to the cellular and telephone networks.

• Internet of Things (IoT)
• Cell Phone
• Intranet
• Local Area Network

A computer system that is designed to perform a specific, dedicated function, such as a microcontroller in a medical drip or components in a control system managing a water treatment plant.

• Firmware
• Internet of Things (IoT)
• Laptop/Notebook
• Embedded System

This refers to software instructions stored semi-permanently (embedded) on a hardware device (BIOS instructions stored in a ROM chip on the motherboard for instance).

• Mobile Device
• Firmware
• Embedded System
• Laptop/Notebook

The global network of personal devices (such as phones, tablets, and fitness trackers), home appliances, home control systems, vehicles, and other items that have been equipped with sensors, software, and network connectivity.

• Internet of Things (IoT)
• Intranet
• Firmware
• iPhone

These devices usually have peripheral devices typically connected via USB, PCMCIA, or ExpressCard adapters.

• Laptop/Notebook
• Desktops
• Projector
• Tablets