A computer network, always referred to as a network, is a collection of computers and devices that are connected to each other through communication channels that facilitate communication and allow the sharing of resources and information between connected devices. Networks is classified according to different characteristics, such as the media used to transfer data with pyher computer, the communication protocol used, scale, topology, organizational scope, etc. Computer networks are now increasingly used by all levels of society, such as government agencies, schools. Schools and the private sector, etc. There are many types of computer networks, some of which are described below:
1. Local Area Network (LAN) :
Local area network is limited to a small geographical area, such as a building or a group of buildings. The data transfer rate is even faster than the data transmitted over phone lines. It is a group of computers that belong to the same organization and are connected in a small geographical area using a network. At the security level, it is not reliable because, for example, an organization's employee can alter important organization data. Due to its small size, one can manage a local area network. Defined characteristics of L area, in contrast to Wide Area Network (WNS), usually require higher data transfer rate, smaller geographical area and leased telecommunication lines. LANs are usually used for a single site where people need to share resources with each other but not with the rest of the world. Think of an office fee building where everyone should be able to access files on a central server or print a document on one or more central printers. Those tasks should be easy for everyone working in the same office fee, but you don't want someone running from outside to be able to send a document to the printer from their cell phone. If the local area network, or LAN, is completely wireless, it is called a wireless local area network or WLN.
2. Metropolitan Area Network (MAN) :
The Metropolitan Area Network or MAN is basically spread over a city, university campus or small area. Humans are larger than LANs and allow users to share information across the city. It is commonly used by schools, campuses, hospitals, large universities, large companies, etc.
3. Wide Area Network (WAN) :
A wide area network covers a relatively large geographical area than LAN and Maine, for example, an entire country. Use public network phone lines and lease lines. This type of network is also spread all over the world. WAN provides network to LAN and MAN. This is very fast and expensive. Wide area networks use fiber optics as a means of communication. The Internet is a well-known example of public WAN.
Malware
Malware is short for malicious software and is used as a single term to refer to viruses, spyware, worms, etc. Some examples of wareware threats are: 1. Virus: A virus is a program written to infect your computer and damage / modify your files / data. Viruses can also mimic themselves. 2. Spam: Spam is a method of flooding the Internet with copies of a single message. Most spam is commercial advertising that is sent to users as spam. Spam is also known as spam emails. P. Piracy: Computer piracy is the practice of modifying computer hardware and software to achieve a goal beyond the original purpose of the manufacturer. In computer security, a hacker is one who detects and exploits vulnerabilities in a computer system or computer network. Hackers can be encouraged for a number of reasons, such as evaluating those vulnerabilities for help, challenges, fun, or helping to overcome them.
Security Concept
1.Network devices :
Such as routers, firewalls, gateways, switch hubs and more, make up the infrastructure of the local area network and the Internet. Protecting such devices is fundamental to protecting the environment and outgoing / incoming communications. Here are some safety tips. Firewall provides protection from outside attacks.
2. Antivirus :
The term 'antivirus' refers to a group of features designed to prevent unwanted and potentially malicious files in your network. These features all work differently, including checking for the presence of a file, size, name or type or virus or graver signature.
Cyber Ethics, IT and new rules of cyber security
Cyber ethics is the philosophical study of computer ethics, which includes user behavior and what computers are programmed to do, and how it affects individuals and society.
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