Question:

(a) Spreading the spectrum for signal transmission helps alleviate the narrow band interference problem. What is narrow band interference? State and describe 2 different techniques that can be used to spread the spectrum.

(b) Describe the following terms in the Bluetooth architecture:
(i) Piconet
(ii) Master
(iii) Slave
(iv) Parked Devices
(v) Standby Devices
(vi) Scatternet

(c) IEEE802.11 supports two types of network architectures, describe these architectures with the support of diagrams detailing the network components.

(d) New types of computer based devices arise from:

(i) Specialisation
(ii) Convergence
(iii) Disaggregation and decentralization

Explain each of the term above and provide an example for each of these cases.

(e) A key component to the success of Ubiquitous computing is sustainability. What is meant by sustainability when associated with Ubiquitous Computing and what are the main sustainability concepts associated with Ubiquitous Computing?