Wired /wireless networks; Effect of mobility on networks, & systems; impact on IP stack from MAC layer and up; ad-hoc and sensor networks; wireless broadcast. II* broadcast. Satellite broadcast; issues of information capacity; distinction between wired and wireless networks from information theory; Issues of security in wireless; issues of 802.11 protocols; routing in wireless networks, design of secure protocols: key distribution for access control, source authentication of transmissions, and non-repudiation; Power management and selfishness issues, attacks in wireless networks; DOS and DDOS attacks, reaction to attacks, information processing for sensor networks.