Name the anti-virus programs which are applied now on computers
Antivirus or anti-virus software (often abbreviated as AV), sometimes known as anti-malware software, is computer software used to prevent, detect and remove malicious software. Antivirus software was originally developed to detect and remove computer viruses, hence the name. However, with the proliferation of other kinds of malware, antivirus software started to provide protection from other computer threats. In my point of view, there are three most popular anti-virus programs, nowadays: Avira, Avast and Kaspersky.
Avira Operations GmbH & Co. KG is a multinational and family-owned company based in Germany that provides antivirus software, Internet Security, Privacy, Identity and Performance tools for computers, smartphones, servers and networks, delivered as both software and cloud-based services. Today it is serving for more than 300 million customers worldwide.
Avast Antivirus is a family of internet security applications developed by Avast Software for Microsoft Windows, macOS and Android. The Avast Antivirus products include free and proprietary cross-platform versions that provide computer security, browser security, antivirus software, firewall, anti-phishing, anti-spyware and anti-spam among other services. As of 2015, Avast is the most popular antivirus on the market, and it had the largest share of the market for antivirus applications. On its website you can see the writing protecting 400 million people worldwide makes us world number one in the market.
Kaspersky Anti-Virus (Russian: АнтивирусКасперского (Antivirus Kasperskogo); formerly known as AntiViral Toolkit Pro; often referred to as KAV) is an antivirus program developed by Kaspersky Lab. It is designed to protect users from malware and is primarily designed for computers running Microsoft Windows and Mac OS X, though a version for Linux is available for business consumers.
Describe is technologies of the parallel and distributed calculations. Wireless network technologies. Mobile applications
Distributed systems are groups of networked computers, which have the same goal for their work. The terms "parallel computing» and "distributed computing" have a lot of overlap, and no clear distinction exists between them. The same system may be characterized both as "parallel" and "distributed"; the processors in a typical distributed system run concurrently in parallel. Parallel computing may be seen as a particular tightly coupled form of distributed computing, and distributed computing may be seen as a loosely coupled form of parallel computing. Nevertheless, it is possible to roughly classify concurrent systems as "parallel" or "distributed" using the following criteria:
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In parallel computing, all processors may have access to a shared memory to exchange information between processors.
In distributed computing, each processor has its own private memory (distributed memory). Information is exchanged by passing messages between the processors.
Distributed algorithms
The algorithm designer only chooses the computer program. All computers run the same program. The system must work correctly regardless of the structure of the network.
A commonly used model is a graph with one finite-state machine per node.
Parallel algorithms
The algorithm designer chooses the structure of the network, as well as the program executed by each computer.
Models such as Boolean circuits and sorting networks are used.[29] A Boolean circuit can be seen as a computer network: each gate is a computer that runs an extremely simple computer program. Similarly, a sorting network can be seen as a computer network: each comparator is a computer.
A wireless network is any type of computer network that uses wireless data connections for connecting network nodes. Wireless networking is a method by which homes, telecommunications networks and enterprise (business) installations avoid the costly process of introducing cables into a building, or as a connection between various equipment locations. Wireless telecommunications networks are generally implemented and administered using radio communication. This implementation takes place at the physical level (layer) of the OSI model network structure. Examples of wireless networks include cell phone networks, Wireless local networks, wireless sensor networks, satellite communication networks, and terrestrial microwave networks. Simple example of wireless technology: Wi-Fi uses radio waves (RF) to allow two devices to communicate with one another. The technology is most commonly used to connect Internet routers to devices like computers, tablets and phones; however, it can be used to connect together any two hardware components. Another example: Bluetooth technologies are used to transfer data over short distances. The technology is frequently used in small consider devices that connect to users phones and tablets. For instance, the technology is used in many speaker systems.
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Mobile telephones applications of wireless networks- One of the best-known examples of wireless technology is the mobile phone, also known as a cellular phone, with more than 4.6 billion mobile cellular subscriptions worldwide as of the end of 2010. These wireless phones use radio waves from signal-transmission towers to enable their users to make phone calls from many locations worldwide. They can be used within range of the mobile telephone site used to house the equipment required to transmit and receive the radio signals from these instruments.
What is Cloud Computing?
Cloud Computing is a general term used to describe a new class of network based computing that takes place over the Internet,
–basically a step on from Utility Computing
– a collection/group of integrated and networked hardware, software and Internet infrastructure (called a platform).
–Using the Internet for communication and transport provides hardware, software and networking services to clients
These platforms hide the complexity and details of the underlying infrastructure from users and applications by providing very simple graphical interface or API (Applications Programming Interface).
•Cloud computing is an umbrella term used to refer to Internet based development and services
A number of characteristics define cloud data, applications services and infrastructure:
–Remotely hosted: Services or data are hosted on remote infrastructure.
–Ubiquitous: Services or data are available from anywhere.
Commodified: The result is a utility computing model similar to traditional that of traditional utilities, like gas and electricity - you pay for what you would want
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