University Computer Network Assignment: Solutions and Analysis

This document presents solutions to a computer network assignment, addressing key concepts in networking. It begins with an explanation of the AMPS system's frequency allocation and cell patterns. The assignment then delves into the LLC layer, its architecture, and its role in handling frame control information and logical addresses, contrasting it with HDLC. The solution further explores the challenges posed by asynchronous devices in LAN environments, including login issues and troubleshooting steps. It also discusses the use of Power over Ethernet (PoE) in the context of the Internet of Things. Finally, the assignment provides a detailed comparison between wired and wireless LANs, highlighting their respective advantages, disadvantages, and security considerations, as well as unique concerns for WLAN network designers. References are included for further study.

Running head: COMPUTER NETWORK
COMPUTER NETWORK
Name of Student
Name of University
Author’s Note

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Answer 10.1: The very initial generation in AMPS system had used a frequency
allotment of various k frequencies along with a cell pattern that is basic in nature of around N=7,
suppose the N cells have been using the similar number of frequencies. K is considered as the
overall number of frequencies that is used in the system. Every cell has K/N frequency bands. In
AMPS, k- 395 and N=7 provides 57 frequency bands every cell in an average.
Answer 11.1: The LLC layer is usually on architecture in particular manner, along with
this it is similar to all the LANs that are defined in IEEE manner. The LLC protocol usually
handles the portion of end user of the frame, control information, logical address and data.
HDLC consists of only one field of address (Stallings, 2018). This is usually utilized for the
purpose of secondary station in a secondary as well as primary configuration. In a particular
LAN any station can be transmitted to any station which is not similar to the previous one. The
receiving station would require seeing its address for knowing the fact that the data is intended
for its own purpose (Li, Lei, 2016). It would also need to check the sending address, the address
that requires to be sent for the purpose of replying.
Answer 11.2: In case an asynchronous device such as teletype, is used for the purpose of
transmitting characteristics one at a time with numerous unpredictable delays between various
characters there are numerous problems that are faced. The issues are also faced in case the
device is connected to LAN. The issues include problems faced during logging in. in numerous
cases, the logging in is not actually successful even if they have the valid WLAN PEAP
password. Sometimes the user does not check the settings on the first page especially the settings
related to the third and sixth screen shots (Belt, Ahmadi and Doyle 2017). In some case the user
also does not change the default options of the device or machines. Sometimes settings usually
appear to be alright but the LAN does not seem to function effectively. In some cases when

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teletype is connected to LAN for transmission, the power over Ethernet can be developed into a
particular key technology for the purpose of using Internet of Things. This happens because the
third PoC generation makes use of four wire pairs and supports outputs till 90 watts with the
current of around 1 ampere every wire pair in order to power numerous terminals.
These problems can be resolved by using various ways, these ways are as follows
 The testing of endpoint network- using this particular configuration, the tester
would act like a specific device on the network and it would have the capability to
detect and monitor problems which might not be visible during the use of
software troubleshooting tools (Ghassemlooy, Popoola and Rajbhandari 2017).
An important part of identifying the source of errors understands the network of
Ethernet.
 VoIP- the diagnostic options for the VoIP connections could also be helpful for
the purpose of troubleshooting. The tester usually connected between VoIP
telephones as well the network, measuring call quality of service (QoS) metrics
for confirming the reported call quality issues and then identifies the issues.
Answer 13.10: The compare and contrast of wired and wireless LANs are as follows
Wired network
 Wired network needs cables for carrying out a connection to every computer
network.
 The cost of a particular wired network is less than the ones charged in wireless
networks such as Ethernet, switches; cables are not at all expensive.

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 Wired LANs offers good performance when compared to various wireless LANs.
Networks that are wired in nature can offer around 100Mpbs bandwidth along
with the usage of technology called Fast Ethernet.
 The Ethernet cables various switches are used in the wired network and these are
very reliable was well.
 Various security considerations for a specific wired network that is connected to
the internet like firewalls. The software of firewall is usually installed on every
computer.
Wireless network
 Wireless network is usually configured in only two ways. These ways are Adhoc
or the infrastructure mode (Ghassemlooy, Popoola and Rajbhandari 2017). The
wireless devices need WLAN cards as well as access points for the
communication.
 The maximum amount of band width provided by the wireless networks are of
around 11Mbps.
 The actual reliability of provided bandwidth of the wireless network is usually
less if compared with the wired network.
 WLANS usually utilize wired equivalent privacy encryption for protecting their
information. This secures the wireless networks similar to the wired networks.
 Various computing devices can be moved or are mobile with the use of wireless
network; this is because the mobility of wireless network is far better as compared
to the wired networks.

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There are various unique concerns that must be addressed by the designer of a particular
WLAN Network; some of these include size of sthe physical location, number of the devices,
intended use of the network and the capabilities of the client devices.

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Refrences
Ghassemlooy Z, Popoola W, Rajbhandari S. Optical wireless communications: system and
channel modelling with Matlab®. CRC press; 2017 Jul 12.
Li Z, Lei Y. Analysis and Discussion about Wireless LAN Technology. In2016 2nd Workshop
on Advanced Research and Technology in Industry Applications (WARTIA-16) 2016 May 14.
Atlantis Press.
Stallings W. Data and computer communication. Tenth edition, 2018.
van de Belt J, Ahmadi H, Doyle LE. Defining and surveying wireless link virtualization and
wireless network virtualization. IEEE Communications Surveys & Tutorials. 2017 Jan
1;19(3):1603-27.