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Security has become one of the essential aspects of networking. No one process fully safeguards networks against intruders — security requires a combination of approaches. Although network security technology improves and evolves as the methods for both attack and defense grow more sophisticated, there are security basics that everyone should be aware of to protect their privacy and data.

Physical Network Security

One often overlooked element of network security involves keeping your hardware devices protected from theft or physical intrusion. Corporations spend large sums of money to lock their network servers, network switches and other core network components in well-guarded facilities.

While these measures aren't practical for homeowners, households should still keep their password-protected broadband routers in private locations, away from nosy neighbors and house guests.

If data theft through physical means — stealing a computer or router — is a concern, one solution is to stop storing your data locally. Online backup services and cloud storage sites keep sensitive files stored off-site at a secure backup location so that even if the local hardware is stolen or compromised, the files are still secure elsewhere.

Widespread use of mobile devices makes physical security much more important. Smartphones are especially easy to leave behind or have fall out of a pocket. News stories in the press abound of people who have their smartphones stolen in public places, sometimes even while they are using them. Be alert to the physical surroundings whenever you use mobile devices and put them away when you are 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 co-worker or acquaintance from snooping when you are out of the room.

Stay in visual contact with a phone when 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 is left unattended. An alarming number of ex-boyfriends/girlfriends, spouses, and neighbors are accused of such acts.

Password Protection

If applied properly, passwords are an extremely effective system for improving network security, but some people don't take password management seriously and insist on using weak, easy-to-guess password like “123456” on their devices and networks.

Follow a few common sense best practices in password management to greatly improve the security protection on a computer network:

• Set strong passwords or passcodes on all devices that join the network.
• Change the default administrator password of network routers.
• Do not share passwords with others more often than necessary. Set up guest network access for friends and visitors, if possible.
• Change passwords when they may have become known.

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If you avoid using strong passwords because they're harder to remember, store them in a password manager.

Spyware

Even without physical access to a device or knowing any network passwords, illicit programs called spyware can infect computers and networks. This happens when you visit malicious websites accidentally or through a link in a phishing email.

Lots of spyware exists. Some monitor a person’s computer usage and web-browsing habits to report the data to corporations who 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, captures and sends the history of all keyboard key presses a person makes, which captures passwords and credit card numbers.

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All spyware on a computer attempts to function without the knowledge of people using it, thereby posing a substantial security risk. Because spyware is notoriously difficult to detect and remove, security experts recommend installing and running reputable anti-spyware software on computer networks.

Online Privacy

Personal stalkers, identity thieves, and perhaps even government agencies, monitor people’s online habits and movements well beyond the scope of basic spyware.

Wi-Fi hotspot usage on commuter trains and automobiles reveal a person’s 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.

Techniques to protect a person’s privacy online include anonymous web proxy servers and VPN services. Though maintaining completeprivacy online is not fully achievable, those methods protect privacy to a certain degree.

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

Network security concept[edit]

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. Download devexpress 12.2.5 full crack. 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.

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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]

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Merriam webster dictionary premium apk full download. Types of attacks include:^[6]

• Passive
  • Network
    • Traffic analysis
• Active:
  • Virus
  • Data modification

See also[edit]

References[edit]

1. ^A Role-Based Trusted Network Provides Pervasive Security and Compliance - interview with Jayshree Ullal, senior VP of Cisco
2. ^Dave Dittrich, Network monitoring/Intrusion Detection Systems (IDS)Archived 2006-08-27 at the Wayback Machine, University of Washington.
3. ^'Dark Reading: Automating Breach Detection For The Way Security Professionals Think'. October 1, 2015.
4. ^'''Honeypots, Honeynets''. Honeypots.net. 2007-05-26. Retrieved 2011-12-09.
5. ^Wright, Joe; Jim Harmening (2009) '15' Computer and Information Security Handbook Morgan Kaufmann Publications Elsevier Inc p. 257
6. ^'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.