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20-05-2017, 11:59 AM

Hello sir, I'm Vishwanath Hiremath pursuing final year Engg in ECE.
I need Network Security and RTOS notes of your's handwriting notes.
Please sir, send it soon.
vishu7037[at]gmail.com

jaseela123d · 22-05-2017, 10:20 AM

Network security consists of policies and practices adopted to prevent and monitor unauthorized access, misuse, modification or denial of a computer network and accessible network resources. Network security involves authorization of access to data in a network, which is controlled by the network administrator. Users choose or are assigned an ID and password or other authentication information that allows them to access information and programs within their authority. Network security encompasses a variety of computer networks, both public and private, used in day-to-day work; Transactions and communications between businesses, government agencies and individuals. Networks can be private, such as within a company, and others that may be open to public access. Network security is involved in organizations, companies and other types of institutions. He does as his title explains: Secures the network, as well as the protection and supervision of the operations being carried out. The most common and easy way to protect a network resource is to give it a unique name and a corresponding password.

Network security starts with authentication, commonly with a username and password. Because this requires only one detail that authenticates the user name, that is, the password, it is sometimes called a one-factor authentication. With two-factor authentication, something the user 'has' is also used (for example, a security token or dongle, ATM card or mobile phone); And with three-factor authentication, something that the user 'is' is also used (for example, a fingerprint or retinal scan).

Once authenticated, a firewall enforces access policies, such as which services users can access on the network. Although effective in preventing unauthorized access, this component may fail to check for potentially harmful content, such as computer worms or Trojans that are transmitted over the network. Antivirus software or an intrusion prevention system (IPS) helps to detect and inhibit the action of such malware. An anomaly-based intrusion detection system can also monitor the network as wireshark traffic and can be registered for auditing purposes and for subsequent high level analysis. Newer systems that combine unattended auto-learning with full analysis of network traffic can detect active network attackers against malicious intruders or external attackers who have committed to a machine or user account.

Communication between two hosts using a network can be encrypted to maintain privacy. Honeypots, essentially attracting resources accessible to the network, can be deployed on a network as monitoring tools and early warning, since honeypots are not normally accessed for legitimate purposes. The techniques used by attackers attempting to compromise these decoy resources are studied during and after an attack to keep an eye on new exploiting techniques. This analysis can be used to further strengthen the security of the actual network protected by the honeypot. A honeypot can also direct the attention of an attacker away from legitimate servers. A honeypot encourages attackers to spend their time and energy on the lure server while distracting their attention from the data on the actual server. Like a honeypot, a honeynet is a network configured with intentional vulnerabilities. Its purpose is also to invite attacks so that the methods of the attacker can be studied and that information can be used to increase the security of the network. A honeynet normally contains one or more honeypots.

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