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Network security is a field of cybersecurity that focuses on protecting computer networks and systems from internal and external cyber threats1. It involves creating a secure infrastructure for devices, applications, users, and data to operate securely23.
The main objectives of network security are:
- Preventing unauthorized access to network resources1.
- Detecting and stopping cyberattacks and security breaches in progress1.
- Ensuring secure access for authorized users to the network resources they need1.
Network security operates in several layers and includes three main areas4:
- Physical Network Security: Controls are put in place to prevent unauthorized personnel from accessing components of the network, such as routers and cable cupboards4.
Network security technologies work at two levels: at the perimeter and inside the network1. At the perimeter, security controls try to stop cyber threats from entering the network. Inside the network, controls are put around resources such as laptops and data1. This strategy of layering multiple controls between hackers and potential vulnerabilities is called "defense in depth"1.
Key tools used in network security include firewalls and network access control (NAC)1. A firewall is software or hardware that stops suspicious traffic from entering or leaving a network while letting legitimate traffic through1. Network access control solutions act like gatekeepers, authenticating and authorizing users to determine who is allowed into the network and what they can do inside1.
Network security provides advantages for various stakeholders, including your customers and employees4. It helps ensure that your internal infrastructure operates as it should4 and is essential to protecting the information of clients, as well as any data your organization shares with other entities4. As networks grow in size and complexity, so does the risk of cyberattack1. Network security safeguards the integrity of network infrastructure, resources, and traffic to thwart these attacks and minimize their financial and operational impact1.
Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.www.cisco.com/c/en/us/products/security/what-is-n…www.spiceworks.com/it-security/network-security/a…softwarelab.org/blog/what-is-network-security/www.ibm.com/topics/network-securitywww.fortinet.com/resources/cyberglossary/what-is …- People also ask
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