Although network security technology improves and evolves as the methods for both attack and defense grow more sophisticated, implement a few security basics to further protect your privacy and data.
Security is an essential aspect of networking, and no single process can safeguard networks fully against intruders; security requires a combination of approaches.
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Physical Network Security
One overlooked element of network security involves protecting hardware devices from theft and physical intrusion. Corporations lock network servers, network switches, and other core network components in well-guarded facilities. These measures aren't practical for homeowners, but you can keep your password-protected broadband routers in a private location, away from neighbors and houseguests.
If the possibility of data theft through physical means — stealing a computer or router — is a concern, one solution is to not store your data locally. Online backup services and cloud storage sites store sensitive files offsite at secure backup locations so that, even if the local hardware is stolen or compromised, the files are still secure.
Widespread use of mobile devices makes physical security important. Smartphones fall out of pockets, are easy to leave behind, and are stolen. A few precautions will keep your devices safe:
- Be alert to your physical surroundings whenever you use mobile devices and put them away when you're finished.
- If your device supports software that allows you to track the device or remotely erase its data, activate it, and use a password with the device to prevent a coworker or acquaintance from looking at your files when you're out of the room.
- Stay in visual contact with your phone if you loan it to someone. A malicious person can steal personal data, install monitoring software, or otherwise hack a phone in just a few minutes when it's left unattended.
Password Protection
If applied properly, passwords are extremely effective in improving network security. Take password management seriously, and don't use weak, easy-to-guess passwords such as 123456. A few other best practices in password management go a long way toward network and device security, too:
- Set strong passwords or passcodes on all devices that join the network.
- Change the default administrator password of network routers.
- Don't share passwords with others unless absolutely necessary.
- Set up guest network access for friends and visitors, if possible.
- Change passwords frequently, especially if you've shared them or they've been discovered.
To make it easier to find and use passwords, store them in a password manager.
Network Security Definition
Spyware
Even without physical access to a device or knowing any network passwords, illicit programs such as spyware can infect computers and networks. This happens when you visit malicious websites accidentally or through a link in a phishing email.
Spyware takes many forms. Some types monitor computer usage and web-browsing habits to report the data to corporations, who then use it to create targeted advertising. Other kinds of spyware attempt to steal personal data.
One of the most dangerous forms of spyware, keylogger software, logs and sends the history of all keyboard actions, capturing passwords and credit card numbers along the way.
All spyware attempts to function without the knowledge of anyone who uses the infected computer, thereby posing a substantial security risk to the computer and the network to which it's connected. Because spyware is difficult to detect and remove, security experts recommend installing and running reputable anti-spyware software on computer networks. Lego stars wars 3 cheats.
Online Privacy
Personal stalkers and identity thieves monitor people’s online habits and movements well beyond the scope of basic spyware.
Wi-Fi hotspot usage on commuter trains and automobiles reveal your location, for example. Even in the virtual world, much about a person’s identity can be tracked online through the IP addresses of their networks and their social network activities.
Privacy protection tools include anonymous web proxy servers and VPN services. Though maintaining completeprivacy online is not fully achievable, those methods protect privacy to a certain degree. Bottom line: Be careful what you share online and with whom.
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Network security consists of the policies and practices adopted to prevent and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the 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 authenticating information that allows them access to information and programs within their authority. Network security covers a variety of computer networks, both public and private, that are used in everyday jobs; conducting transactions and communications among businesses, government agencies and individuals. Networks can be private, such as within a company, and others which might be open to public access. Network security is involved in organizations, enterprises, and other types of institutions. It does as its title explains: It secures the network, as well as protecting and overseeing operations being done. The most common and simple way of protecting a network resource is by assigning it a unique name and a corresponding password.
- 2Security management
Introduction To Network Security Tutorial
![Network Network](/uploads/1/2/3/7/123704687/624438929.jpg)
Network security concept[edit]
Network Security Tutorials
Network security starts with authentication, commonly with a username and a password. Since this requires just one detail authenticating the user name—i.e., the password—this is sometimes termed one-factor authentication. With two-factor authentication, something the user 'has' is also used (e.g., a security token or 'dongle', an ATM card, or a mobile phone); and with three-factor authentication, something the user 'is' is also used (e.g., a fingerprint or retinal scan).
Once authenticated, a firewall enforces access policies such as what services are allowed to be accessed by the network users.[1] Though effective to prevent unauthorized access, this component may fail to check potentially harmful content such as computer worms or Trojans being transmitted over the network. Anti-virus software or an intrusion prevention system (IPS)[2] help detect and inhibit the action of such malware. An anomaly-based intrusion detection system may also monitor the network like wireshark traffic and may be logged for audit purposes and for later high-level analysis. Newer systems combining unsupervised machine learning with full network traffic analysis can detect active network attackers from malicious insiders or targeted external attackers that have compromised a user machine or account.[3]
Communication between two hosts using a network may be encrypted to maintain privacy.
Honeypots, essentially decoy network-accessible resources, may be deployed in a network as surveillance and early-warning tools, as the honeypots are not normally accessed for legitimate purposes. Techniques used by the attackers that attempt to compromise these decoy resources are studied during and after an attack to keep an eye on new exploitation techniques. Such analysis may be used to further tighten security of the actual network being protected by the honeypot. A honeypot can also direct an attacker's attention away from legitimate servers. A honeypot encourages attackers to spend their time and energy on the decoy server while distracting their attention from the data on the real server. Similar to a honeypot, a honeynet is a network set up with intentional vulnerabilities. Its purpose is also to invite attacks so that the attacker's methods can be studied and that information can be used to increase network security. A honeynet typically contains one or more honeypots.[4]
Security management[edit]
Security management for networks is different for all kinds of situations. A home or small office may only require basic security while large businesses may require high-maintenance and advanced software and hardware to prevent malicious attacks from hacking and spamming.
Types of attacks[edit]
Networks are subject to attacks from malicious sources. Attacks can be from two categories: 'Passive' when a network intruder intercepts data traveling through the network, and 'Active' in which an intruder initiates commands to disrupt the network's normal operation or to conduct reconnaissance and lateral movement to find and gain access to assets available via the network.[5]
![Introduction Introduction](/uploads/1/2/3/7/123704687/479532204.jpg)
Types of attacks include:[6]
- Passive
- Network
- Traffic analysis
- Network
- Active:
- Virus
- Data modification
See also[edit]
References[edit]
- ^A Role-Based Trusted Network Provides Pervasive Security and Compliance - interview with Jayshree Ullal, senior VP of Cisco
- ^Dave Dittrich, Network monitoring/Intrusion Detection Systems (IDS)Archived 2006-08-27 at the Wayback Machine, University of Washington.
- ^'Dark Reading: Automating Breach Detection For The Way Security Professionals Think'. October 1, 2015.
- ^'''Honeypots, Honeynets''. Honeypots.net. 2007-05-26. Retrieved 2011-12-09.
- ^Wright, Joe; Jim Harmening (2009) '15' Computer and Information Security Handbook Morgan Kaufmann Publications Elsevier Inc p. 257
- ^'BIG-IP logout page'(PDF). Cnss.gov. 1970-01-01. Retrieved 2018-09-24.
Further reading[edit]
- Case Study: Network Clarity, SC Magazine 2014
- Cisco. (2011). What is network security?. Retrieved from cisco.com
- Security of the Internet (The Froehlich/Kent Encyclopedia of Telecommunications vol. 15. Marcel Dekker, New York, 1997, pp. 231–255.)
- Introduction to Network Security, Matt Curtin.
- MPLS, SD-WAN and Network Security', Yishay Yovel.
- Security Monitoring with Cisco Security MARS, Gary Halleen/Greg Kellogg, Cisco Press, Jul. 6, 2007.
- Self-Defending Networks: The Next Generation of Network Security, Duane DeCapite, Cisco Press, Sep. 8, 2006.
- Security Threat Mitigation and Response: Understanding CS-MARS, Dale Tesch/Greg Abelar, Cisco Press, Sep. 26, 2006.
- Securing Your Business with Cisco ASA and PIX Firewalls, Greg Abelar, Cisco Press, May 27, 2005.
- Deploying Zone-Based Firewalls, Ivan Pepelnjak, Cisco Press, Oct. 5, 2006.
- Network Security: PRIVATE Communication in a PUBLIC World, Charlie Kaufman | Radia Perlman | Mike Speciner, Prentice-Hall, 2002. ISBN .
- Network Infrastructure Security, Angus Wong and Alan Yeung, Springer, 2009.
Retrieved from 'https://en.wikipedia.org/w/index.php?title=Network_security&oldid=903607020'
Network Security deals with all aspects related to the protection of the sensitive information assets existing on the network. It covers various mechanisms developed to provide fundamental security services for data communication. This tutorial introduces you to several types of network vulnerabilities and attacks followed by the description of security measures employed against them. It describes the functioning of most common security protocols employed at different networking layers right from application to data link layer. After going through this tutorial, you will find yourself at an intermediate level of knowledge regarding network security.
This tutorial is prepared for beginners to help them understand the basics of network security. The ones who are keen on taking up career in the field of Information and Network security, this tutorial is extremely useful. For all other readers, this tutorial is a good learning material.
We assume the reader has a basic understanding of computer networking and cryptography. Knowledge about communication protocols is a plus.