1.1. Introduction1.2. Wireless networks and communications1.2.1. Wireless communications1.2.2. Wireless networks1.2.3. Classification of wireless networks1.2.3.1. Classification by type of network architecture1.2.3.2. Classification by extent of the zone covered1.2.3.3. Classification by means of access to the radio channel1.2.3.3.1. Time division multiple access (TDMA) networks1.2.3.3.2. Frequency division multiple access (FDMA) networks1.2.3.3.3. Code division multiplex access (CDMA) networks1.2.3.3.4. Space division multiplex access (SDMA) networks1.3. Ad hoc networks (MANET)1.3.1. Characteristics and advantages1.3.2. Applications1.4. Routing of ad hoc networks1.4.1. Hierarchical routing, flat routing and routing by geographic localization1.4.2. Link-state, distance-vector and source-routing protocols1.4.3. Proactive, reactive and hybrid routing1.5. Conclusion