Types of Network

• LAN – Local Area Network – is a computer network that connects computers and devices in a limited geographical area such as home, school, computer laboratory or office building.
• WLAN – Wireless Local Area Network – links two or more devices using some wireless distribution method (typically spread-spectrum or OFDM radio), and usually providing a connection through an access point to the wider internet. This gives users the mobility to move around within a local coverage area and still be connected to the network. Most modern WLANs are based on the 802.11 (WiFi) standard.
• WAN – Wide Area Network – is a computer network that covers a broad area (i.e., any network whose communications links cross metropolitan, regional, or national boundaries). This is in contrast withpersonal area networks (PANs), local area networks (LANs), campus area networks (CANs), or metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area (e.g., a city) respectively.
• MAN – Metropolitan Area Network – a data network designed for a town or city. In terms of geographic breadth, MANs are larger than local-area networks (LANs), but smaller than wide-area networks (WANs). MANs are usually characterized by very high-speed connections using fiber optical cable or other digital media.
• SAN – Storage Area Network, System Area Network, Server Area Network, or sometimes Small Area Network – is a dedicated storage network that provides access to consolidated, block level storage. SANs primarily are used to make storage devices (such as disk arrays, tape libraries, and optical jukeboxes) accessible to servers so that the devices appear as locally attached to the operating system. 
• CAN – Campus Area Network, Controller Area Network, or sometimes Cluster Area Network – is a vehicle bus standard designed to allow micro controllers and devices to communicate with each other within a vehicle without a host computer.
• CAN – is a message-based protocol, designed specifically for automotive applications but now also used in other areas such as industrial automation and medical equipment.
•  PAN – Personal Area Network – is a computer network used for communication among computer devices, including telephones and personal digital assistants, in proximity to an individual's body. The devices may or may not belong to the person in question. The reach of a PAN is typically a few meters. PANs can be used for communication among the personal devices themselves (intra-personal communication), or for connecting to a higher level network and the Internet
• DAN – Desk Area Network