COVID-19 is a pandemic that shake the world even harder and faster than tsunami tides. Covid-19 is a contagious disease caused by the virus named Severe Acute Respiratory Syndrome COronaVirus-2 (SARS-CoV-2). It started off from Wuhan city of Hubei province china in December 2019. Initially it was known as 2019 novel coronovirus (2019 nCoV). On 11 march WHO declared COVID-19 as pandemic. India reported its first patient on January 30 from Thrissur Kerala, a student from Wuhan. In this paper we did a survey of the outbreak and its spread in a short span and its impact on the people both physically and mentally. Also we tried to justify our survey with enough facts and statistical data.

IoT or the Internet of things refers to all the physical devices connected to the internet. IoT consists of computing devices that are web-enabled and have the capability of sensing, collecting, and sending data. IoT provides the ability to remote control appliances and has many more applications. Since IoT is becoming a big part of society, it is necessary to ensure that these devices provide adequate security measures. This paper discusses various security issues in IoT systems like threats, vulnerabilities and some countermeasures which can be used to provide some security. Developing a secure device is now more important than ever, as with the increase in digitization, much of a user’s data is available on these devices. Securing data is a primary concern in any system, as internet-enabled devices are easier to hack. The idea of this paper is to spread awareness and improve the security of IoT devices.

In this paper, we emphasize the concept of Internet of Things (IoT), in addition to reviewing the main challenges of the IoT environment by focusing on the recent research directions in this topic. With the increasing dependency of events over the smart objects which can be easily controlled and monitored, can be identified automatically and communicate with each other through internet and can make decisions by themselves, there is an urgent need of new paradigm which can connect these smart devices together and that new paradigm is Internet of Things. in fact, the IoT environment possesses a large range of challenges has a wide impact on their performance, which can be divided into two categories, that is i) General challenges: for example communication, heterogeneity, virtualization and security; plus ii) Unique challenges: for example wireless sensor network (WSN), Radio Frequency Identification (RFID), and as a final point Quality of service (QoS) which is measured as a common factor between general and special challenges. This paper highlights the major applications of the IoT. More than a small number of sectors like security and emergency, meteorology, banking, agriculture, Surveillances, health care, education, government e services, domestic appliances monitoring, traffic surveillance are integrated and a variety of objects and devices are connected using RFID technology. This paper as well describes that how various fields are connected by means of RFID technology and sensor networks.

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Wireless Sensor Networks (WSN) has vital research issues in communication. WSN network has sensor and communicating node which are placed in remote areas to sense and send the recorded data to base station. Routing protocols are network layer protocol which discovers the best available path from source node to destination node. The packet loss problem can be happen due to transmission errors, broken links and no route to the destination and these problem is analyzed using different routing and mobility parameters. In this paper, research work is to implement different routing protocol of wireless sensor network on ns-2 simulators and analyze the performance of quality of services issues in terms of performance parameters as Packet Delivery Ratio v/s routing protocol and Packet Delivery Ratio v/s mobility.