Wireless Networks & Communication Answer 2022

WIRELESS NETWORKS &
COMMUNICATION

Answer 1
Difference between Network access layer and IP layer of TCP protocol
Network Access layer is the first layer in the TCP/IP model that determines flow of the data to
the network physically. It defines signaling of bits optically or electrically by the hardware
devices such as optical fiber, twisted pair copper wire, coaxial cable etc. On the other hand
Internet layer is just another layer after the network access layer in the TCP model which packs
the data into IP datagrams. It performs the task of routing this IP datagrams across network
between participant nodes. The datagram contains the source and destination address which
helps in the transfer of these packets from source to destination.
Answer 2
The following is the flow of interaction between the Chinese and French Prime Minister:
Both the Chinese and French PM would carry the telephone discussion as they are talking in
front of one another. When the Chinese PM converse his message will be passes legitimately to
French PM on the other side. The communication will be passed through the translators at each
end. When the message reaches the other end, the translator at the French PM Telephone
translates the message into French which can be heard and understand by the French Prime
minister.
Answer 3
In figure 1
Maximum Amplitude is 15
Time Period is 8.3-5.3= 3
Frequency 1 / t = 1 / 3= 0.333 Hz
Phase is zero.

In Figure 2
Maximum Amplitude is 4
Time Period is 8.3-1.7= 6.6 sec
Frequency 1 / t= 1 / 6.6 = 0.15 Hz
Phase is zero.
In figure 3
Maximum Amplitude is 7.8
Time Period is 3.5-1.2 = 2.3 sec
Frequency 1 / t = 1 / 2.3 = 0.43 Hz