Which layer of the OSI model is responsible for data encryption and decryption ?
Presentation Layer
Transport Layer
Application Layer
Session Layer
Answer : A
Explain : The presentation layer is the sixth layer in the Open System Interconnection (OSI) model.The presentation layer performs functions such as: Translation, Encryption and decryption, Compression and decompression.
Which layer of the OSI model ensures that data packets are delivered in the correct order ?
Presentation Layer
Transport Layer
Application Layer
Session Layer
Answer : B
Explain : The transport layer is Layer 4 of the Open Systems Interconnection (OSI) communications model. It's responsible for: Managing network traffic between hosts and end systems, Ensuring complete data transfers, Providing transparent transfer of data between end users, etc. The transport layer uses protocols such as: TCP, UDP, DCCP, SCTP.
How many layers are there in the TCP/IP model?
8
6
7
4
Answer : D
Explain : The TCP/IP model has four layers: Network Access Layer, Internet Layer, Transport Layer and Application Layer.
Which of the following layer is also known as 'Port Layer' in OSI Model ?
Presentation Layer
Transport Layer
Application Layer
Session Layer
Answer : D
Explain : The session layer in the Open Systems Interconnection (OSI) model is also known as the "port layer". The session layer is responsible for: Setting up and taking down connections between two endpoints,Ensuring sessions remain open and functional while data is being transferred and Closing sessions when communication ends. It uses the ports defined in layer 4 to create sockets and sessions between communicating devices.
Which of the following is IEEE of wifi max ?
800.11
800.16
802.16
802.12
Answer : C
Explain : WiMAX is based on the IEEE 802.16 standard. IEEE 802.16 is the IEEE standard for Wireless Metropolitan Area Network (Wireless MAN).
Which environment does Global Sensor Network work on ?
C++
JAVA
HTML
C
Answer : B
Explain : GSN stands for Global Sensor Network. GSN works on JAVA language because JAVA language is portable in nature. The other language (such as C, C++, Python, and HTML) is not portable in nature.
Which of following allows the user to control electronic components.
MQTT API
RESTful API
RETful API
CoAP API
Answer : C
Explain : RETful API allows the user to control the electronic components.
What does the acronym "REST" stand for in RESTful APIs ?
Rapid Extraction of Stateful Text
Resource Extraction and State Transfer
Representational State Transfer
Remote Endpoint Security Technique
Answer : C
Explain : A RESTful API is an application programming interface (API) that uses HTTP requests to access and use data. REST stands for representational state transfer.
The examples of Open-loop system in control system are:
Traffic Light, Toaster
Traffic Light, Temperature Controller
Traffic Light, Washing machine
All of these
Answer : A
Explain : Open loop system are system which is not depend on feedback. Examples of open-loop control systems include: Traffic signals, Washing machines ( simple ), Volume on stereo systems, Electrical clothes dryers, Electric lamps, Bread toasters, Hand dryers, Coffee makers etx.
The differences in an open-loop and a closed-loop systems are based on:
Feedback
Stability
Complexity
All of these
Answer : A
Explain : The main difference between open-loop and closed-loop control systems is feedback. Open-loop systems do not use feedback to control the process. Closed-loop systems use feedback to continuously adjust the control inputs to maintain the desired output.
What is ESP8266 used in IoT applications?
Low-cost Wi-Fi module
In-build HTTP software
Microprocessor on a chip
High-cost Wi-Fi module
Answer : A
Explain : The ESP8266 is a Wi-Fi module that is used to develop Internet of Things (IoT) applications. It is a system on a chip (SOC) microchip that is produced by Espressif Systems. The ESP8266 is a standalone wireless transceiver that is available at a low price.