Coursera Answers

IoT Cloud Coursera Quiz Answers

by Niyander

Hello Friends in this article i am gone to share Coursera Course: IoT Cloud by University of Illinois at Urbana-Champaign | IoT Cloud Coursera Quiz Answers with you..

Enroll Link: IoT Cloud 

Also visit: IoT Networking Coursera Quiz Answers

 

IoT Cloud Coursera Quiz Answers

Week 1 and 2 Quiz Answers

Question 1)
What is the advantage of using a slotted chassis design for a router?

  • Enhanced airflow, simplifying ability to cool the device.
  • Improved fault-tolerance due to hot-swappable cards.
  • Ability to isolate different network segments, through the use of VLANs.
  • Ability to incorporate modular components such as SFPs.

Question 2)
Which of the following functionality does a NAT device perform?

  • Actively blocks intrusions from entering the network
  • Filters traffic, for example through via Access Control Lists (ACLs)
  • Acts as an intermediary for traffic exiting the domain
  • Forwards and performs lookups at layer 3
  • Performs translation (e.g., downsampling) on data contained in the packet
  • Forwards and performs lookups at layer 4
  • Detects and signals alarms on intrusions entering the network
  • Forwards and performs lookups at layer 2
  • “Translates” addresses, for example from public to private address space

Question 3)
Which of the following functionality does a Firewall device perform?

  • Forwards and performs lookups at layer 3
  • Performs translation (e.g., downsampling) on data contained in the packet
  • Forwards and performs lookups at layer 4
  • Detects and signals alarms on intrusions entering the network
  • Actively blocks intrusions from entering the network
  • Filters traffic, for example through via Access Control Lists (ACLs)
  • “Translates” addresses, for example from public to private address space
  • Forwards and performs lookups at layer 2
  • Acts as an intermediary for traffic exiting the domain

Question 4)
Which of the following device types forwards and performs lookups at layer 4?

  • Reverse Proxy
  • NAT
  • Switch
  • Router
  • None of the options are correct

Question 5)
Which of the following functionality does a Transcoder device perform?

  • “Translates” addresses, for example from public to private address space
  • Detects and signals alarms on intrusions entering the network
  • Forwards and performs lookups at layer 4
  • Filters traffic, for example through via Access Control Lists (ACLs)
  • Forwards and performs lookups at layer 2
  • Performs translation (e.g., downsampling) on data contained in the packet
  • Acts as an intermediary for traffic exiting the domain
  • Actively blocks intrusions from entering the network
  • Forwards and performs lookups at layer 3

Question 6)
In the Healthcare network example we went over, what was a key purpose of using all those VLANs?

  • To enable Cisco equipment to be used, as VLANs are a Cisco-proprietary technology.
  • To prevent data packets from “mixing”, so a client’s request doesn’t get directed to the wrong server’s data.
  • To allow voice, video, and regular data to all share the same network, so applications can access all three together.
  • To keep adversaries and malware out of critical data.
  • To allow virtualization of the IP core.

Question 7)
You just got a job at Comcast working on their new machineQ Enterprise IoT service. In an effort to improve service for customers, they are asking you to deploy firewall/IDS/IPS technology into their network. Their initial test deployment will focus on smaller customers getting service through their broadband access network. Where would you deploy these technologies and why?

  • Hub (layer 2 termination).
  • PSTN.
  • Headend (layer 3 termination).
  • NAS.
  • Node terminating coax into fiber.
  • Optical/wireline physical-layer amplifier.

Question 8)
Where do routing protocols run within a router architecture?

  • ASIC
  • Data Plane
  • Router CPu
  • Switching Fabric
  • Backplane
  • SRAM/TCAM
  • Queues

Question 9)
What is the component in a router that moves packets from the input queue to the output queue?

  • SRAM/TCAM
  • Data Plane
  • Backplane
  • Router CPU
  • ASIC
  • Queues

Question 10)
What component within a router is responsible for storing forwarding tables?

  • Control Plane
  • Backplane
  • Router CPU
  • Queues
  • SRAM

Question 11)
What is a swappable physical port of a router called

  • SFP
  • Chassis
  • Console Port
  • Line Port
  • Case
  • Ethernet Interface
  • Line Card

Question 12)
What is the physical casing of the router called?

  • Coating
  • Chassis
  • Case
  • Body
  • Casing

Question 13)
What is the purpose of the router’s console port?

  • To enable configuration of the router.
  • To directly attach a video display.
  • To connect the router to a network.

Question 14
Routing protocols run in the ______ of the router.

  • Device Plane
  • Data Plane
  • Network Plane
  • Control Plane
  • ASIC

Question 15)
What effect would excessive head-of-line blocking have on a switch’s performance?

  • Excessive packet fragmentation.
  • Longer queues.
  • CPU overload.
  • Slower packet processing time.
  • Control-plane slowdowns.

Question 16)
Why are packets fragmented into fixed-size cells within routers?

  • To allow them to be encased with headers, so later hardware components know what output port to send them to.
  • To simplify hardware design of the backplane.
  • To accelerate speed of the control-plane, by forwarding smaller-sized packets.
  • To allow the ASIC to be implemented using smaller lithography techniques.
  • To simplify hardware design of input/output ports.

Question 17)
Suppose you have a router with 24 1Gbps ports connected across a 5Gbit backplane. Queue-to-backplane bandwidth is 0.8Gbps. You want to provision for any 8 ports being fully utilized.

What part of your router comprises the performance bottleneck?

  • Queue-to-backplane bandwidth.
  • Port bandwidth, by 1.4Gbps.
  • Backplane, by 1.4Gbps.
  • Backplane, by 5Gbps.
  • Port bandwidth, by some other amount.
  • Port bandwidth, by 5Gbps.
  • Backplane, by some other amount.

Question 18)
Suppose you have a router with 24 1Gbps ports connected across a 5Gbit backplane. Queue-to-backplane bandwidth is 0.8Gbps. You want to provision for any 8 ports being fully utilized.

Given the bottleneck of this router, what components could you reduce bandwidth of, to save costs?

  • Backplane
  • Network
  • Port bandwidth
  • Queue-to-backplane bandwidth
  • None of the options are correct

Question 19)
What is an advantage of input-queued over output-queued device architectures?

  • Enables a slower backplane to be used.
  • Malicious traffic can be filtered at device inputs, before it can traverse through and congestion the device’s backplane.
  • Reduces queue sizes, reducing amount of high speed expensive memory needed.
  • Eliminates need for distributed QoS algorithms to be implemented inside the router.
  • None of the options are correct

Question 20)
Which of the following statements are true?

  • Routing takes place in the data plane, forwarding takes place in the control plane.
  • Routing takes place in the control plane, forwarding takes place in the data plane.
  • Routing and forwarding are synonymous, both used to refer to the same thing.
  • None of the options are correct

 

Week 3 and 4 Quiz Answers

Question 1)
What material has valence electrons so attracted to the nucleus that they don’t hop between atoms, and it’s not easy to dope them to do otherwise?

  • Semiconductor
  • Proconductor
  • Conductor
  • Insulator
  • All of the options are correct

Question 2)
Which of these materials are conductive, yet have the most strength?

  • Epoxy
  • Aluminum
  • Latex
  • Tin
  • Silver
  • Copper

Question 3)
What are some reasons we coat metal wires with other conductors?

  • To protect against the elements.
  • To make the wiring more difficult to tap.
  • To prevent someone handling the wires from getting electrocuted.
  • To leverage the skin effect to improve transmission properties.

Question 4)
You are building an IoT device that has a moveable arm, which bends back and forth. You need to run a wire up the arm to supply a sensor at the endpoint with power. Which stranding type is best for wires that get flexed back and forth a lot like that?

  • Plated
  • Shielded
  • Solid
  • Stranded

Question 5)
You are building an IoT device that has a mount that rotates back and forth. You need to run a wire up that is used to collect data from the sensor. What stranding type is best for wires that twist back and forth like that?

  • Solid
  • Bunched
  • Concentric Unilay
  • Concentric Contra-Helical

Question 6)
What are some ways you can build a device that is resilient to catching fire or burning?

  • Used twisted-pairing.
  • Infuse components with capsaicin or denatonium benzoate.
  • Use components with materials that reduce smoke and toxic gasses.
  • Incorporate time-domain reflectometry.
  • Jacket it with fire-retardant plastic.

Question 7)
Why do we use twisted pairing in Ethernet cable? Select all that are true:

  • Noise tends to affect both wires together, allowing receiver to read information as difference between wires.
  • EMI produced from one wire doesn’t tend to affect the other wire, as they are at right angles to each other.
  • One wire tends to act as a shield for the other, blocking noise from reaching it.
  • Noise affecting one direction of the twist tends to affect the other direction in an opposite way, causing much of the noise to cancel out.

Question 8)
What is the purpose of surrounding a cable or device with braided shield?

  • Increasing frequency of signal carried in the cable
  • Enhancing electromagnetic induction
  • Reducing noise
  • Protection from compression forces

Question 9)
What is the technology/technique used to isolate problems in outdoor cable runs and other situations where you can’t easily observe the entire cable?

  • Enter answer here

Question 10)
When a wave pulse encounters a hard (fixed) boundary, what happens to it?

  • It returns back, inverted.
  • It returns back, reduced in amplitude.
  • It does not return back.
  • It returns back.
  • It returns back, reduced in amplitude and inverted.

 

Week 1 Honors Checklist Quiz Answers

Question 1)
Check what applies to you (pick all that apply).

  • I have finished the lab assignment for week 1 honors section.
  • I have posted the discussion forum entry for week 1 honors section and responded to at least two entries of my peers.
  • I certify that I have completed these tasks to my own and best efforts, and that I am able to explain what I did.

Question 2)
If you did the lab, you should know the answer to this question. In the lab description, what is called DISCO?

  • An automated tracking service
  • A dispatch and supply service
  • A cloud storage service
  • A navigation service

 

Week 2 Honors Checklist Quiz Answers

Question 1)
Check what applies to you (pick all that apply).

  • I have finished the lab assignment for week 2 honors section.
  • I have posted the discussion forum entry for week 2 honors section and responded to at least two entries of my peers.
  • I certify that I have completed these tasks to my own and best efforts, and that I am able to explain what I did.

Question 2)
If you did the lab, you should know the answer to this question. In the lab a software package is mentioned. Which one?

  • Anaconda
  • Cobra
  • Rattle Snake
  • Water Moccasin

 

Week 3 Honors Checklist Quiz Answers

Question 1)
Check what applies to you (pick all that apply).

  • I have finished the lab assignment for week 3 honors section.
  • I have posted the discussion forum entry for week 3 honors section and responded to at least two entries of my peers.
  • I certify that I have completed these tasks to my own and best efforts, and that I am able to explain what I did.

Question 2)
If you did the lab, you should know the answer to this question. In the lab a software package called Pandas is mentioned. What is it used for?

  • Smart devices controlling
  • Encryption and data security
  • Manipulation and analysis of data
  • Interaction Design for Virtual Reality

 

Week 4 Honors Checklist Quiz Answers

Question 1)
Check what applies to you (pick all that apply).

  • I have finished all the lab assignments of the entire course.
  • I have posted the discussion forum entry for week 4 honors section and responded to at least two entries of my peers.
  • I certify that I have completed these tasks to my own and best efforts, and that I am able to explain what I did.

Question 2)
If you did the lab, you should know the answer to this question. In step 4 of the lab, the concept of machine learning is explained. Which one of the functions listed below is NOT an activation function?

  • Relu
  • Sigmoid
  • Softplus
  • Cosh
  • Tanh