Section B: Compulsory, answer all $(10$ marks$)$

$$What is the principle of frequency reuse in the context of a cellular network $(1\mathrm{.}5$ marks$)$

$$What is the main difference between proactive and reactive routing protocols as used in Mobile Adhoc Networks $($MANETs$)/$Wireless Local Area Networks $($WLANs$)$ and give an example of each?

$(3$ marks$)$

$$List five ways of increasing the capacity of a cellular system. $(1\mathrm{.}5$ marks$)$

$$With the aid of the diagram below which shows the TEEE $802\mathrm{.}11$ architecture,

$$Identify the names of the regions labelled A$,$ B$,$ C$,$ D$,$ E and F$.(1$ mark$)$

$$Define A$,$ C$,$ D and E $(3$ marks$)$