Wireless Ad Hoc Networks:

A wireless ad hoc network is also known as wireless mesh network or mobile ad hoc network (MANETs). It is a wireless network made up of radio nodes organized in a mesh topology. Each node forwards messages on behalf of the other nodes and each node performs routing. Ad hoc networks can "self-heal", automatically re-routing around a node that has lost power. Various network layer protocols are needed to realize ad hoc mobile networks, such as Distance Sequenced Distance Vector routing, Associativity-Based Routing, Ad hoc on-demand Distance Vector routing, and Dynamic source routing.

Wireless MAN:

Wireless metropolitan area networks are a type of wireless network that connects several wireless LANs.

• WiMAX is a type of Wireless MAN a

• Wireless WAN:nd is described by the IEEE 802.16 standard.^[8]

Wireless wide area networks are wireless networks that typically cover large areas, such as between neighbouring towns and cities, or city and suburb.

 These networks can be used to connect branch offices of business or as a public Internet access system. 

The wireless connections between access points are usually point to point microwave links using parabolic dishes on the 2.4 GHz band, rather than omnidirectional antennas used with smaller networks.

 A typical system contains base station gateways, access points and wireless bridging relays. Other configurations are mesh systems where each access point acts as a relay also.

 When combined with renewable energy systems such as photovoltaic solar panels or wind systems they can be stand alone systems.

Global area network:

A global area network (GAN) is a network used for supporting mobile across an arbitrary number of wireless LANs, satellite coverage areas, etc. 

The key challenge in mobile communications is handing off user communications from one local coverage area to the next. In IEEE Project 802, this involves a succession of terrestrial wireless LANs.

Space network:

Space networks are networks used for communication between spacecraft, usually in the vicinity of the Earth. The example of this is NASA's Space Network.,