Address bus

Carries addresses from the processor to memory and input/output devices.

Accumulator

The accumulator is a part of the CPU.  It temporarily stores the results of calculations and data.

Wi-Fi

This is a method of connecting devices in a network wirelessly using radio waves.

TCP/IP

Stands for Transmission Control Protocol / Internet Protocol.  This protocol governs and enables communication over the internet.

Star topology

A network layout where each device in the network is connected to a central switch.

SMTP

Stands for Simple Mail Transfer Protocol.  It governs the sending of email over a network to a mail server.

Protocols

Network protocols are a set of pre-defined rules that govern how devices communicate with each other over a network.

POP

Stands for Post Office Protocol.  It governs the retrieving of emails from email servers.