Practical Wireless Ethernet and TCP/IP Networking | My Assignment Tutor

Advanced Diploma of IndustrialAutomation DIA Module 17: Practical Wireless Ethernet and TCP/IP Networking Written Assessment Version 5.5 Student Full name:I certify that the attached assignment is my own work and that any material drawn from other sources has been acknowledged. Copyright in assignments remains my property. I grant permission to the Engineering Institute of Technology (EIT) to make copies of assignments for assessment, review and/or record keeping purposes. I note that the EIT reserves the right to check my assignment for plagiarism. Should the reproduction of all or part of an assignment be required by the EIT for any purpose other than those mentioned above, appropriate authorization will be sought from me on the relevant form.Please place a tick () in the box below to indicate that you have read, understood, and certify the above statement.  Please include this page in/with your submission.   Any electronic responses to this submission will be sent to your Moodle account. 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Cutting and pasting from Internet sites or the study material does not enhance that learning process. However, appropriate diagrams can be pasted if you cannot draw them.Attempt ALL questions.Use this document for furnishing your answers by typing the answers after each question in the space provided. Use this Microsoft Word document as it stands, i.e. do not convert it to PDF format. Make sure that you preserve the original question numbers and that you don’t change the question numbers by adding extra lines or deleting existing ones.Do not add extra pictures, etc. as annexures, but add them directly into this main answer sheet. Hand-drawn sketches can be inserted after scanning, but please ensure that the assignment file size does not exceed 10 MB.Refer in the text to diagrams and pictures that you have drawn or pasted in. Do not simply paste them into the document without referring to them in the text.Finally, when saving your document (in WORD FORMAT), ensure you edit the title to include your name: COURSECODE_MODULE#_ASSIGNMENT_VERSION#_YOURNAME E.g. DIA03_Module17_Assignment_v5.5_BOB_BROWN All answers must be in your own words. Copying and pasting is not allowed.Please ensure that you sign and date the statement below to verify your assessment submission as your own material. Module 17: Practical Wireless Ethernet and TCP/IP Networking Written Assessment Total marks: 170 marks Sections in Assessment: Written SectionMultiple-choice Questions INSTRUCTIONS: You may download Wireshark directly from the Internet. Make sure that you include ‘winpcap’ during installation. Numerous YouTube videos are available on the use of Wireshark. Alternatively, you may use Wireshark installed on the remote laboratory machines. Either way, in order to present your results, take judicious screenshots of the appropriate part of the screen (as .jpg or similar files). There are many ‘snag’ programs available on the Internet. The free version of “Screenhunter” works well, as does the built-in “Snipping Tool” in Windows 10 – see logo. Copy & paste these into your answer script with an appropriate description of what you want to illustrate. Now continue to answer all questions. Q1View the series on VLANs and trunks: Explain the differences between (i) access ports and (ii) trunks. Refer to the IEEE 802.1Q VLAN standard. (2 marks) Give a concise description, with graphic illustration, of an IEEE 802.1Q field added to an Ethernet packet. (2 marks)(4 marks)A1Student AnswerF1Assessor Feedback(marks awarded)Q2Explain the following layer-2 (LAN) network concepts: CSMA/CD in a scenario with 4 x PCs connected to a hub. (3 marks) Why does a full-duplex switch behave like a shared hub immediately after start-up? (2 marks) How does auto-negotiation function on a switch port and what are its advantages? (3 marks)(8 marks)A2Student AnswerF2Assessor Feedback(marks awarded)Q3Determinism. Explain the importance of determinism in an industrial LAN. (1 mark) Explain why a lightly loaded Fast- or Gigabit Ethernet (‘as is’, without IEEE 1588 or VLANs), can be considered deterministic enough for most industrial systems. (2 marks)(3 marks)A3Student AnswerF3Assessor Feedback(marks awarded)Q4NetID Explain the role that the NetID plays in routing an IP packet on the LAN of origin, from the originating host to the default gateway. (1 mark) Explain the concept of subnetting a network. (2 marks) Why is the number of available HostIDs on a subnet always two less than the maximum? (2 marks) Illustrate this by calculating the amount of HostIDs on a default class C subnet. (2 marks)(7 marks)A4Student AnswerF4Assessor Feedback(marks awarded)Q5Subnet masks: Is the subnet mask valid in a class C network environment? (2 marks) How many HostIDs can be hosted on the above-mentioned subnet? (2 marks) A host with IP address is preparing to send a packet to Will this packet be delivered directly or via a router? Explain your answer. (2 marks)(6 marks)A5Student AnswerF5Assessor Feedback(marks awarded)Q6Static vs. dynamic routing tables: Discuss the difference between static and dynamic routing. (2 marks) List three advantages of static routing. (3 marks)(5 marks)A6Student AnswerF6Assessor Feedback(marks awarded)Q7Reserved IP addresses: Are the series of addresses contained in 192.168.0.x a part of any of the reserved (private) IP addresses? If so, in which class? Fully explain your answer. (8 marks) Which series of IP addresses are reserved in class B? (2 marks)(10 marks)A7Student AnswerF7Assessor Feedback(marks awarded)Q8Routing concepts: Study: and answer the following questions. What was the original use of NAT? Explain the concept of IP masquerading. Explain the concept of port forwarding. What is the purpose of route tracing? Which DOS utility can be used for route tracing?(10 marks)A8Student AnswerF8Assessor Feedback(marks awarded)Q92.4GHz Wi-Fi: You may read or for additional information on this question. How many non-overlapping IEEE 802.11b channels are there in the 2.4 GHz ISM band? How wide should each of these non-overlapping channels be? How far are these non-overlapping channels supposed to be spaced apart?**You may read for additional information on this question. Two IEEE 802.11b APs are in close proximity. The first is set to channel 1. Which channels could you use on the second one? Why?(5 marks)A9Student AnswerF9Assessor Feedback(marks awarded)Q105GHz Wi-Fi: You may read for additional information on this question. You have two IEEE 802.11a APs, one of them is on channel 42. Is this an indoor or an outdoor frequency in South Africa? What will be the closest channel for United States? What will be the closest channel for Australia? What form of modulation is used on this technology?(4 marks)A10Student AnswerF10Assessor Feedback(marks awarded)Q11ISM bands: What was the ISM bands originally intended for? (Tip, answer lies in the name represented by the acronym ISM) (1 mark) What additional use have they found lately? (1 mark)(4 marks)A11Student AnswerF11Assessor Feedback(marks awarded)Q12Encoding (other than Spread Spectrum): In the figure below, the number of bits encoded per symbol (vertical axis) is shown against the signal-to-noise ratio (horizontal axis) required for successful transmission. Does 16 QAM provide a significant advantage over any other encoding scheme on a noisy channel at 5dB SNR? Explain your answer. Does 16 QAM hold a significant advantage over 16 PSK on a 15 dB SNR channel? Explain your answer. What is the minimum SNR required for QPSK to work well? Would you say it can be advantageous to have an encoder which can encode any of the five schemes as well as a monitoring tool for the SNR ratio of the channel? What would you be able to do with such a setup?(8 marks)A12Student AnswerF12Assessor Feedback(marks awarded)Q13Spread Spectrum (SS) encoding: Name four spread spectrum techniques. (2 marks) Which one of them was originally devised against eavesdropping in the military environment? (2 marks)(4 marks)A13Student AnswerF13Assessor Feedback(marks awarded)Q14Radio frequency terminology: Research and concisely describe the following RF terms: Isotropic antenna Antenna gain Beam width(9 marks)A14Student AnswerF14Assessor Feedback(marks awarded)Q15Insight into RF systems Would a high-gain dish antenna be suitable for use as the antenna at the base station in a PtMP (Point to Multi-Point) setup, yes or no? Explain your answer.(3 marks)A15Student AnswerF15Assessor Feedback(marks awarded)Q16Wi-Fi setup, variants, and terminology: Describe the following typical steps for a new Wi-Fi AP rollout: (8 marks) Install set up test Compare the minimum and maximum data rate of any 4 IEEE802.11___ Wifi technologies. (8 facts = 4 marks) Explain the significance, and give examples of BSSID and SSID (2 marks) Briefly explain the concept of (Layer2) bridging. (2 marks) Briefly explain the concept of (Layer2) roaming. (2 marks) Describe the benefits of Multiuser MIMO (MU-MIMO) in modern Wifi. (2 marks)(20 marks)A16Student AnswerF16Assessor Feedback(marks awarded)Q17Medium Access Control Algorithms: Expand the acronyms and describe the basic difference in the operation between IEEE 802.3 (CSMA/CD) and IEEE 802.11 (CSMA/CA) Medium Access Control methods. Briefly describe the operation of CSMA/CA as used in Wi-Fi, in the case of a hidden node.(10 marks)A17Student AnswerF17Assessor Feedback(marks awarded)Q18Wi-Fi sign-on, authentication and security issues: With reference to Wi-Fi, expand the acronyms AES and RADIUS and explain what they are, and how they are used in authentication.(4 marks)A18Student AnswerF18Assessor Feedback(marks awarded)Q19How does the WPA (or WPA2) authentication implementation differ for: Home users (WPA-Personal)? Corporate users (WPA-Enterprise)?(6 marks)A19Student AnswerF19Assessor Feedback(marks awarded)Q20Wi-Fi site surveys List the steps involved in performing a site survey for Wi-Fi. (6 marks) Name four measurements taken during an active Wi-Fi site survey. (4 marks)(10 marks)A20Student AnswerF20Assessor Feedback(marks awarded)Q21Industrial RF technologies Give a brief technical description of Wireless HART. (2 marks) List four differences between Wireless HART and ISA100.11a. (4 marks) What is ISA 100.11a? (2 marks) Why was the ISA100 committee formed? (2 marks)(10 marks)A21Student AnswerF20Assessor Feedback(marks awarded) END OF WRITTEN SECTION – MULTIPLE CHOICE SECTION ON FOLLOWING PAGE. MULTIPLE-CHOICE QUESTIONS Please answer the following multiple-choice questions by selecting the correct line(s) and change the colour of the correct answer(s) to blue: Q22Which 802.11 standard has the best performing parameters in terms of data rate, range, channel separation issues and interoperability? 802.11a 802.11b 802.11g 802.11n(1 marks)F22Assessor Feedback(marks awarded)Q23WPA2 uses IEEE 802.X with the Extensible Authentication Protocol (EAP) to perform mutual authentication, either via a… server or by means of a changing key generated based on a shared secret passphrase. AES WEP RADIUS Common(1 marks)F23Assessor Feedback(marks awarded)Q24At the MAC level, 802.3 LANs involve the use of__for medium access control. CSMA/CD CSMA/CA BSSIDs and SSIDs Bridging and Roaming(1 marks)F24Assessor Feedback(marks awarded)Q25Which two answers are true? Auto negotiation is mandatory for a 1000BASE-T LAN The IP Masquerade server acts as a router Port forwarding; referred to as tunnelling NAT is an acronym for Network Address Token Determinism has no pre-determined or fixed timing The default gateway performs bridging functions(2 marks)F25Assessor Feedback(marks awarded)Q26How many hosts are possible on each subnet of a class B network if the subnet mask is 8192 and 8 62 and 16 30 and 14 8190 and 6(1 marks)F26Assessor Feedback(marks awarded)Q27Which two answers are TRUE for Ethernet (IEEE802.3) Frames? The Source and Destination Address fields carry 6 bytes in total The payload data field is a variable length field and depend on the data carried No CRC is used as the frames are inherently reliable The Preamble and SFD fields contain 8 bytes each The Source and Destination Address fields carry 6 bytes each(2 marks)F27Assessor Feedback(marks awarded)Q28Which two answers are TRUE for the setup of new AP’s in a new building? There is no reason for IT professionals and architects to consult about building design when as building layout doesn’t influence Wi-Fi coverage at all A large of amount of work goes into planning the positions of AP’s in new buildings Architects and IT professionals should team up when planning AP’s in new buildings as little design changes can have a profound influence on coverage Radius servers are not required in corporate Wi-Fi systems It is not required to plan where AP’s are to be installed in a new building(2 marks)F28Assessor Feedback(marks awarded)Q29Which three answers are TRUE for Wi-Fi? Roaming is best carried out by giving each AP its own SSID An AP can either be a bridge or an AP, never both simultaneously The BSSID of AP’s are often taken from the MAC address of the radio Corporate roaming requires a RADIUS server to invisibly hand users over between stations When AP’s are used in bridge + AP mode, they easily become bottlenecks as load increases(3 marks)F29Assessor Feedback(marks awarded)Q30Which three of the following statements are true? Voltage gain is expressed as Power gain is expressed as Gain in dB can be simply added and subtracted Voltage gain is expressed as Power gain is expressed as(3 marks)F30Assessor Feedback(marks awarded)Q31Which three of the following statements are true? dBm is an absolute value dBm is a relative value Positive dB represents gain Positive dB represents a loss dBi is used exclusively to indicate antenna gain relative to a theoretically ideal isotropic radiator.(3 marks)F31Assessor Feedback(marks awarded)Q32Which line indicates antenna types with ever-decreasing gain, correctly? Isotropic, Yagi, Dipole, Parabolic Dipole, Yagi, Dipole, Parabolic Parabolic, Yagi, Dipole, Isotropic Isotropic, Dipole, Yagi, Parabolic Isotropic, Parabolic, Dipole, Yagi(1 marks)F32Assessor Feedback(marks awarded) END OF ASSESSMENT


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