What is Firewall? In English

A firewall is a software or hardware system designed to prevent unauthorized access to an individual computer or network of computers. They are used mostly as a first line of defense to protect your device or network from online threats such as hackers, viruses, Trojans, and worms.Every time you are connected to the Internet, your computer is exposed to all sorts of dangerous programs and malicious people that want to infiltrate your computer to steal your personal information, send spam emails to your inboxes, or use your computer to launch attacks on other computers.A good firewall system blocks attackers from trying to infiltrate your system and prevents your data and information from flowing out to the bad guys. Like a brick wall, a firewall acts as a barrier to protect your computer from online threats Fire walls have a similar function as the drawbridge and the portcullis grate in front of the entrance on a medieval castle-controlling who can go in and out.While a castle has its fortified entrance through which both the defenders and attackers have topass, a computer either a standalone machine or computer network -has its firewall at the access point for connecting to the outside world.Fire walls essentially work by examining data packets entering and leaving your computer or network.

The primary purpose of a firewall is to allow non-threatening traffic and prevent malicious or unwanted data traffic for protecting the computer from viruses and attacks. A firewall is a cyber security tool that filters network traffic and helps users block malicious software from accessing the Internet in infected computers.

Hardware vs. Software Firewalls

A firewall can be implemented using either software or a separate physical device (usually for large networks) or a combination of both Hardware fire walls are built into the routers. They are designed to protect all the devices connected to a network. If you are connecting to the internet through a broadband router, the router's firewall is already protecting your device.oftware fire walls are included in Microsoft operating systems such as Windows XP, Vista, 7, 8 and 10 and it is turned on by default. Window's fire walls generally provide less protective features than those purchased from anti virus vendors. One notable feature missing from Windows has been two-way controls to restrict what travels out from your device as well as what comes in.Fire walls made by internet security companies can provide two-way protection and may also block malware and other malicious programs.

What are life process?

WHAT ARE LIFE PROCESSES? The maintenance functions of living organisms must go on even when they are not doing anything particular. Even when we are just sitting in class even if we are just asleep, this maintenance job has to go on The processes which together perform this maintenance job an We processes . Since these maintenance processes are needed to prevent damage and break-down energy is needed for them. This energy comes from outside the body of the mdhadual organism. So there must be a process to transfer a source of energy from outside the body of the organism which we call food, to the inside, a process we commonly call nutrition If the body size of the organisins is to grow, additional raw material wit also be needed from outside. Since life on earth depends on carbon- based molecules most of these food sources are also carbon-based Depending on the complexity of these carbon sources, different organisms can then use different kinds of nutritional processes The outside sourc...

Nutrition in human being?

Nutrition in Human Beings The alimentary canal is basically a long tube extending from the mouth to the anus. we can see that the tube has different parts. Various regions are specialised to perform different functions. What happens to the food once it enters our body? We shall discuss this process here. We eat various types of food which has to pass through the same digestive tract, Naturally the food has to be processed to generate particles which are small and of the same texture. This is achieved by crushing the food with our teeth, Since the lining of the canal is soft, the food is also wetted to make its passage smooth. When we eat something we like, our mouth waters. This is actually not only water..but a fluid called saliva secreted by the salivary glands. Another aspect of the food we ingest is its complex nature. If it is to be absorbed from the alimentary canal, it has to be broken into smaller molecules. This is done with the help of biological catalysts called enzyme...

Adaptation in lion & adaptation in deer

A large area of land covered mainly with trees and plants is called alaust And a large area of grass covered land used for grazing is called grassland There are few trees or places for animals to hide gland habitats. Due to this speal is important for the animals which live in grassland habitats (so they can nits away from their enemies) For most common purposes, however, the wrous forest and and are used in the same sense. The forest (or grassland) is a habitat Many animals such as lon som elephants deer, en live in forest habitats. There are many features of a lion, a deck, other animals and plant which help them to survive in the forest habitat. The adaptations in lion and deer to the forest habitat are described below. Adaptation of lion The lion is a camivorous animal which eats only the meat (or flesh) of oder animals. The lion lives in a forest habitat The adapted to the forest habitat in the following ways: 1.The lion is a strong, fast and agile animal which can hunt and ...

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