Part I $[$True$/$ False$](10$ Points$)$:

In cellular networks, high frequencies have shorter range compared to low frequencies.

In IEEE $802\mathrm{.}11,$ devices can't detect collision, but they are able to avoid it$.$

ARP protocol map the IP address to MAC address.

In IEEE $802\mathrm{.}11$ AP send periodically Beacon frames to enable mobiles association.

Ethernet and IEEE $802\mathrm{.}11$ use the same frame structure.

In streaming stored video, UDP is recommended as it offers low end to end delay

In Voice Over IP$,$ to maintain the conversational aspect of the communication, a delay of $150$msec is considered good and accepted.

The SIP protocol is used to establish and maintain communication sessions in multimedia.

In physical layer, the selected modulation scheme affects the data rate at the physical layer.

In Voice Over IP$,$ a packet received after its scheduled playout time is considered lost.