Choose the correct answer:

i$.$ The second generation of mobile communication phones was

a$)$ digital

b$)$ analog

c$)$ semi analog

d$)$ radio frequency

ii$.$ Enhance data rate for GSM evolution $($EDGE$)$ is a system, with a data rate of $384kbps.$

a$)1G$

b$)2\mathrm{.}5G$

c$)3\mathrm{.}5G$

d$)4G$

iii. This is due to reflection of radio signals by solid objects, which results in signals being received along multiple paths.

a$)$ Infrared systems

b$)$ Carrier sense multiple access

c$)$ Multipath fading

d$)$ Orthogonal frequency division multiplexing

iv$.$ Which of the following is the IEEE standard for Wi Max?

a$)802\mathrm{.}3$

b$)802\mathrm{.}11$

c$)802\mathrm{.}15$

d$)802\mathrm{.}16$

v$.$ has a data rate of $23\mathrm{.}5mbps,$ with coverage of $50m$ and low mobility of

a$)$ HiperLAN$/1$

b$)$ HiperLAN$/2$

c$)$ IrDA

d$)$ Bluetooth

vi$.$ Wireless communication suffers from frequent disconnection and slow speeds, as compared with wired communication due to

a$)$ Ubiquitous computing

b$)$ Wireless connectivity

c$)$ Weak connectivity

d$)$ Pervasive Computing.

vii. cellular systems were the first generation of mobile telephone communication systems.

a$)$ Analog

b$)$ Digital

c$)$ Semi analog

d$)$ Radio frequency

viii. MAC sub layer of $802\mathrm{.}11$ supports two modes of operation.

e$)$ Association & Disassociation

f$)$ Distributed & Point Coordination Function

g$)$ IEEE $802\mathrm{.}3$& IEEE $802\mathrm{.}16$

h$)$ Infrared System & HyperLAN