Data and network Answer 2022

Running Head: Data and Network 0
Data and Network
Task
Student name

Data and Network 1
Table of Contents
Answer 1......................................................................................................................................................1
1.1............................................................................................................................................................1
1.2............................................................................................................................................................1
1.3............................................................................................................................................................1
1.4............................................................................................................................................................1
Answer 2......................................................................................................................................................1
2.1............................................................................................................................................................1
2.2............................................................................................................................................................2
2.3............................................................................................................................................................2
Answer -3....................................................................................................................................................2
3.1............................................................................................................................................................2
3.2............................................................................................................................................................2
Answer-4.....................................................................................................................................................3
4.1............................................................................................................................................................3
4.2............................................................................................................................................................3
4.3............................................................................................................................................................3
References...................................................................................................................................................4

Data and Network 2
Answer 1
1.1
Data transfer rate in a second is known as bit rate. It can be measured in such as bps, Mbps, and
others. It is the way to identify a number of bits transfer in the channel. Most of the network is
based on the speed on the channel. In addition, organizations have selected network based on
the bit rate (Tanenbaum, 2014).
1.2
We can calculate the bit rate using this formula, which is s:
Signal per level * bandwidth = bit rate
Therefore, according to provide data,
Bitrate = 8*3 = 24
1.3
We can calculate the channel
C = B log2(1+SNR)
SNRdB = 6 dB
Therefore,
SNR= 10 log10(S/R)  SNR = 4
C = 3*106 x 1og2(1+4) ≈ 8 Mbps.
C= 2 Mbps
1.4
In a network, a channel is used for the data transfer. A channel is used to transfer the data using
a medium. In addition, the channel has used for making a connection between different nodes.
We can provide the actual transfer rate of that medium using data rate. It is a speed of data
transfer in a medium between two workstations (Tanenbaum, 2014).

Data and Network 3
Answer 2.
2.1
Multiplexing: it is a way to combine analog or digital signal into one signal and transfer it over a
shared medium. It is necessary to secure the signal with a high level of frequency and it is also
secure the signal from distortion, attenuation, and noise (Mitchell, 2018).
When analog or digital signals combined in a single signal and transfer it with a career frequency
then this process is known as multiplexing. It has used to secure the signal from various
transmission impairments, such as attenuation, distortion, and noise (Kenneth C. Mansfield &
Antonakos, 2009). In addition, demultiplexing is the reverse process of multiplexing in which
combined signals are separated at the end of the workstation.
2.2
1. Packet switching can further be divided into two subcategories – virtual circuit approach and
the datagram approach.
2. Circuit switching takes places at the physical layer.
3. In packet switching the resources need to be reversed during the setup phases.
2.3
Host A has three options, which are 3, 0, 1. Therefore, it chose to switch 1 port 1 for outgoing so VCI is b.
after that switch 2 accept it on port 3 as b and transfer that packet from port 2. Therefore, VCI value is e.
now, switch 3 accept it on port 0 and used port 1 for packet transfer. Therefore, VCI at port 1 of switch 3
is h (Sunshine, 2013).
All the router and links are properly specified and data can be transfer using a proper channel.

Data and Network 4
Answer -3
3.1
4+1 =5 total length will be 5 bits and only one bit will be added based on the parity in the data word.
Moreover, the hamming distance will be 1 and it can correct only 1-bit error from the transfer data.
3.2
Alice and Bob communicate with the help of three frames and two routers. They should have a specific
link and IP address for the communication. This is the physical links of three frames.
1. Link-1 has L6 and L2
2. Link-2 has L4 and L2
3. Link-3 has L5 and L1
The router will provide the IP address to all the devices at the source and destination (Forouzan,
2007).
Answer-4
4.1
Are there packet
collisions
Is carrier sensing
required
Is the number of the
stations fixed
TDMA NO Yes yes
Polling No Yes No
Slotted-ALOHA Yes No Yes
CSMA/CA Yes Yes yes
4.2
These are the wireless technologies in between given choices, which are Bluetooth, 802.11n, ADSL only
(Thakur, 2018).

Data and Network 5
4.3
True or false
In AMPS, CDMA has been used for
channelization
False
Handoff is used in a cellular system to support
continuous transmission for a mobile station
True
In CDMA-based cellular systems, the
frequency-reuse factor can be 1.
False
CSMA/CD is used for wireless LAN as it can
avoid the hidden node problem (Cowley, 2012)
False

Data and Network 6
References
Cowley, J., 2012. Communications and Networking. 2 ed. kingswinford: Springer Science & Business
Media.
Forouzan, A. B., 2007. Data communications & networking. 8th ed. New Delhi: Tata McGraw-Hill
Education.
Kenneth C. Mansfield, J. & Antonakos, J. L., 2009. Computer Networking for LANS to WANS: Hardware,
Software and Security. 1 ed. Bostan(MA): Cengage Learning.
Mitchell, B., 2018. What Is Computer Networking?. [Online]
Available at: https://www.lifewire.com/what-is-computer-networking-816249
[Accessed 16 January 2019].
Sunshine, C. A., 2013. Computer network architectures and protocols. New Jersy: Springer Science &
Business Media.
Tanenbaum, A. S., 2014. Computer networks. Harlow, Essex: Pearson.
Thakur, D., 2018. Bluetooth - What is Bluetooth?. [Online]
Available at: http://ecomputernotes.com/computernetworkingnotes/communication-networks/
bluetooth
[Accessed 4 December 2018].