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Unit Code: MN603

Unit Title: Wireless Networks and Security

Assessment Title: Evaluation of IoT networks

Melbourne Institute of Technology, Australia

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Purpose of the assessment (with ULO Mapping) - The purpose of the assignment is to compare the communication technologies for IoT and evaluate their performance. Students will be able to complete the following ULOs:

b. Compare standards-based technologies used in various networks;

c. Test and evaluate various wireless networks performance;

Assignment Description -

The assessment requires students to compare the communication technologies, which could be used with IoT enabled devices and evaluate their performance. The students are required to submit a report, which includes:

Introduction - Communication Technologies - IoT

Many associated devices are moving toward the new communication innovations due to their systems and administrations approaches as per accessible assets. The new communication innovations find a provision to give consistent availability which is the prerequisite of IoT. Communication innovations utilized in IoT has low power utilization, low bandwidth, low power consumption, consistent communication with devices because of the idea of IoT is figuring for everybody, anyplace, any system and any administration. Besides, these innovations are especially entering in e-wellbeing, e-traffic the board, e-calamity the executives and so on. In this report, we will discuss about various communication technologies that can be used in IoT, their network performance and various security challenges that can occur in these devices.

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1. Comparison of the existing communication technologies for IoT by emphasizing on the use of sensor network and wireless technologies in terms of:

a. Band of Operation

b. Modulation techniques

c. Data rates

d. Nominal range of operation

Comparison between Communication Technologies

Technology

Band of Operation

Modulation techniques

Data Rates

Nominal range of operations

ZigBee

Zigbee is the main mesh network that is appropriate for working in two ISM frequency bands, that are - sub-GHz 800-900 MHz for regional area and 2.4 GHz for worldwide acknowledgment. This type of dual band can enable adaptability and plan choice for manufacturers, as well as consumers that require to associate items crosswise over structures, urban areas and homes.

The modulation can be done by utilizing Offset Quadrature Phase Shift Key (O-QPSK) modulator, which total the in-phase signal with a half cycle deferred quadrature stage signal.

1Mbps

10m

LoRaWAN

LoRaWAN uses the sub-gigahertz unlicensed radio range spectrum to empower LPWAN communication among sensors and gateways that are associated with a system and application servers in the Cloud.

LoRaWAN provides a transmission current of 18 mA at 10 dBm and 84 mA at 20 dBm. This difference in transmission can allow LoRaWAN to be supported by minimal effort batteries, which may include coin cells.

LoRaWAN highlights an information rate of ~293 bps-50 kbps. The LoRaWAN convention adjusts information rate progressively relying upon how far the sensor is from the gateway therefore enhancing time-on-quality of the signal and diminishing any type of collision.

15Km

Z-Wave

Z-Wave utilizes the Part 15 unlicensed industrial, scientific, and medical (ISM)  band.Using source-directed mesh network innovation, Z-Wave signals can jump through other Z-Wave devices to achieve best control.

The Z-Wave PHY and MAC layers depend on the ITU-T G.9959 worldwide radio standard, and the convention utilizes GFSK modulation as well as Manchester encoding. It additionally incorporates AES 128 encryption, IPv6 and multichannel operation.

Z-Wave offers transmission rates of small information packets that utilizes throughput rates of 9.6 kbps, 40 kbps or 100 kbps.

600 feets

RFID

Radio frequency identification mainly uses radio signs to screen and recognize real time objects or individuals without requiring line of sight communication. This convention was planned going for permitting devices without batteries sending a signal. A microchip is situated in the tag and that communicates over a wireless communication utilizing distinctive frequencies in the LF (Low Frequency), HF (High Frequency), or UHF (Ultrahigh Frequency) bands.

Passive tags don't effectively transmit a signal, consequently, in the close field; tag to peruser connection can be attained by using load modulation. Load modulation can be accomplished by balancing the impedance of the tag as observed by the peruser.

100KHz to 5.8GHz

10m

Wi-Fi

Wireless communication is also known as Wi-Fi, the IEEE 802.11x standards. It is the most widely recognized approach to interface devices remotely to the Internet. WiFi interface is inbuild in PC, Smartphone and Tablet and can be used to communicate with wireless router and can have two way access to the web.

It uses adaptive modulation which implies that the transmitter will naturally move to a progressively robust, however less productive, modulation system in those antagonistic conditions.

54MB/s

4-20m

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2. Evaluate the network performance of the communication technologies for IoT and comment of how wireless technologies impact the performance.

Network Performance of Communication Technologies

As we know that, network performance of IoT network reduces with the increase in distance and also with the increase of the network traffic. The network performance in IoT falls apart by the appropriated dispute of the hubs for the mutual wireless medium in IoT. Contingent upon the unwavering quality needs of the framework, using advancements that work on unlicensed recurrence groups may trade off its performance. Choosing the advancements that less meddle with one another can help in guaranteeing the right arrangement. Wi Fi mainly uses IEEE standards that operates in the 5 GHz band, it has less obstruction levels as compared to other devices. This implies it has an high level state of execution, however it additionally implies that the chips for this standard are increasingly costly. Working in the 5 GHz band has higher proliferation loss than working in the 2.4 GHz band. These communication technologies can increase the performance of IoT network by increasing the range and minimize the noise.

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3. Identify and analyse the security and privacy issues in IoT, particularly the issue of securing its wireless system.

Security & Privacy Issues

Security requirements are very necessary for measuring security and that can be characterized as a lot of conditions that depict properties of IoT security objective. Security objectives like confidentiality, integrity, accessibility, as well as non-notoriety are considered as properties to accomplish security goals. The main security issues include:

The perception layer is very vulnerable against a wide range of physical assaults, like malicious altering of devices and their communication links, and Denial-of-Service (DoS) assaults. The system layer is presented to a few dangers found in the conventional system networks; it likewise has a few vulnerabilities that are increasingly explicit to the IoT, which include system convention issues, privacy disclosure, and similarity issues. Like some other IT customer with Human-Machine Interface (HMI), the application layer additionally has some vulnerabilities like information access, security validation, and malware.

As different RFID tags can transmit information data to the peruser at the equivalent time and that can cause the peruser not ready to get information effectively. Having the counter impact procedure can keep different tags from transmitting data to the peruser simultaneously. WSNs have constrained assets which include very small storage, poor estimation capacity, restricted sensing range, which prompts an arrangement of system security threats. One focus of perception layer is to actualize the environment. Constrained scope of a solitary hub makes network structure complex with a vast number of sensing hubs.

Also, in the IoT, Ad hoc network structure is a distributed non-center network, which can reduce heterogeneous between the perception layer hubs by Ad hoc network routing protocol. To a specific degree, if the system hubs change, it can adjust to these changes, facilitate between hub powerfully and perception layer network communication in the center system and won't influence the task of the whole system. Security risks of conventional Ad hoc network in IoT are from the radio channel and systems. Wireless channel is vulnerable against eavesdropping as well as impedance. In expansion, non-focus and self-organizing systems endure from vulnerable presenting, tricking and various other types of assault.

DoS Attack in Network Layer - Spoofing, replaying and confusion of traffic can occur in network layer. Flood assault causes high traffic in channels by clogging the channel with a strangely high number of pointless messages. Here a solitary vindictive hub sends a pointless message which is then replayed by the assailant to make a high traffic.

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4. Propose a communication technology for IoT enable devices in a home network.

Proposed Communication Technology for Home Network

I would like to propose LoRaWAN communication technology for home network. Long Range Area-Wide Networks i.e LoRaWAN is a protocol which is explicitly worked for IoT applications on wide area network systems. It is intended to empower data communication at low rates in low power wide area network systems associating IoT devices with a centralized network server. LoRaWAN (IEEE 802.15.4g) works in unlicensed range beneath 1 Ghz and offers information rates of 0.3-50 kbps.

It is secured as compared to other wireless advancements for IoT on the grounds that it can transmit encoded information at various frequencies and bitrates. This communication technology has numerous modern and smart home applications, and with a scope of up to 20 km, is a key innovation that empowers IoT smart cities projects to push ahead and execute as productively as could be expected under the circumstances.

Evaluation of IoT Networks.png

LoRa WAN communication guarantees dependable, secured communication process that adds extra headers to the information packets. The LoRaWAN systems spread out in a star-of-stars topology have base stations transferring the information between the sensor hubs and the system server. The communication process between the sensor hubs and the base stations goes over the remote channel using the LoRa physical layer, while the association between the gateways and the central server are taken care of over a IP-based system. The sensors may interface with the LoRa transponder chip, or the sensor might be a coordinated unit with the LoRa transponder chip which is installed.

It can be possible to program the small scale controllers in miniaturized scale Python or smaller scale Javascript. This enables engineers to utilize the information from sensors like accelerometers, temperature, and so forth and execute certain utilization cases eg. Fall identification algorithms might be executed by programming the small scale controller dependent on the contributions from the accelerometer as well as the sensors.

Conclusions -

To empower the IoT vision of enhanced communication to the devices, the Internet must help interfacing things utilizing an assortment of wireless as well as mobile advancements. In this paper, we have discussed five communication technologies, that are - ZigBee, LoRaWAN, Wi Fi, RFID and Z-Wave. This paper also analyzed these advancements and assessed their abilities and practices with respect to different measurements counting the information range and rate, network size, RF channels and transfer speed, control utilization, furthermore, the IoT ecosystem. The paper featured the unique qualities of these wireless low power innovations and the issues about their fuse in the IoT. Also, it discussed various security and privacy issues that can occur in IoT network.

It ought to be noted, that the low-power and low cost qualities of these innovations and their combination in the IoT demand new administration, security, as well as privacy strategies or moving toward the common administration and security assurance frameworks in an unexpected way. There is a need to deal with a remarkable number of things associated with the Internet producing a large measure of traffic crosswise over heterogeneous systems, especially those with low-control capacities In this manner, the challenge will be in supporting secure and interoperable data communication between these different advances developing an eco-system of coincided devices instead of separated islands of network systems.

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