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1. networks

   • LAN
     • is a computer network that spans a relatively small area. Most often, a LAN is confined to a single room, building or group of buildings, however, one LAN can be connected to other LANs over any distance via telephone lines and radio waves
   • WAN
     • is a telecommunications network that extends over a large geographical area for the primary purpose of computer networking.
   • WPAN
     • is a personal area network - a network for interconnecting devices centered around an individual person's workspace - in which the connections are wireless.

2. connection types

   • bluetooth
     • refers to a wireless technology which allows digital devices to easily transfer files at high speed. Bluetooth is common in many portable devices such as laptops, PDAs, mobile phones, smartphones and tablets
   • wifi
     • a facility allowing computers, smartphones, or other devices to connect to the Internet or communicate with one another wirelessly within a particular area.
   • ethernet
     • is the traditional technology for connecting wired local area networks (LANs), enabling devices to communicate with each other via a protocol -- a set of rules or common network language.
   • GPRS
     • is a packet-based wireless communication service that promises data rates from 56 up to 114 Kbps and continuous connection to the Internet for mobile phone and computer users.

3. computer hardware

   • CPU
   • RAM
   • virtual memory