WEEK 7 2022 Flashcards
(T/F)You have an IoT temperature sensor that is sensing temperature from a particular location and sending the
data over the network to a server situated far away in another city for storage. This is an example of
remote data logging.
True
For a two-way communication between a client and server, i.e both the client and the server send data to
each other, it is important that both of them knows about the following about each other
Both the IP address and port number
If you are using Raspberry Pi (RPi) to connect standard IoT sensors (such as DHT temperature sensors),
which among the following components of the Raspberry Pi do you use connect your Pi to your sensor for
data transfer.
General purpose Input Output(GPIO) pins of the RPi
(T/F)It is possible to connect a single DHT temperature sensor with a suitable number of connection wires with
two Raspberry Pis acting as a client for the same sensor.
True
Which among the following denotes the correct connection order for a standard 4-PIN DHT sensor with the
order of PIN numbers taken as 4,3,2,1 (from right to left)
Ground, Null, Data, Power
Using the matplotlib library in Python, you are plotting a graph of pressure values versus time, with
pressure taken in the vertical axis and time taken in the horizontal axis. While writing the code to plot the
graph, which among the following is the correct parameter (denoted by ‘??’) that you can write within the
function “ylabel(??)”
Pressure
(T/F)Lack of centralized control is a problem and limitation of traditional network architectures without
Software Defined Networking (SDN) support
True
(T/F)Detaching the physical hardware from the overlying software components, such as the Operating System
(OS) and applications forms an important aspect of transitioning to SDN
True
Flow rules are stored within SDN switches that run the OpenFlow protocol in the following format.
Tables
Among the following, which is the most unlikely to be considered as a suitable candidate for a match
field for flow rules in SDN
Temperature of the switch motherboard
In SDN, the central controller of one network can communicate with the central controller of another
SDN network through which of the following directional APIs
East-West bound APIs
Suppose in SDN, there are two switches S1 and S2. The same packet P arrives in both the switches, S2
does not have the appropriate flow rule to forward this particular packet, whereas S1 has. Then with
respect to the two switches, what is the correct action that is taken.
S2 sends PACKET_IN to controller, S1 forwards the packet
(T/F)No matter how big an SDN network becomes, we can never have more than one SDN controller.
False
(Y/N)With Software Defined IoT, it is possible to control the individual physical sensor and actuator nodes as
well as rule placement of the backbone network remotely by suitable orchestration and software.
Yes
Soft-WSN that has been proposed as one of the solutions to Software Defined IoT achieves the following
Both Device and Topology Management
