Network Security Definition

Network security refers to the practice of preventing and protecting against unauthorized invasion of corporate networks. It aims at complementing endpoint security, which focuses on separate devices; network security, on the other hand, focuses on how those devices interact, and on the connective tissue between them.

How Network Security Works?

Network security incorporates multiple layers of defenses at the edge and in the network. All network security layers implement controls and policies. Authorized users attain access to network resources, but unauthorized actors are blocked from executing threats and exploits.

Types of Network Security

  • Access Control
  • Application Security
  • Behavioral Analytics
  • Antivirus and Antimalware Software
  • Data Loss Prevention
  • Email Security
  • Mobile Device Security
  • Network Segmentation
  • Security Information and Event Management
  • Firewalls
  • Intrusion Prevention Systems
  • Web Security
  • Wireless Security
  • VPN

Access control

All users need not have access to your network. To keep out potential attackers, you will have to recognize each device and each user and then enforce your security policies. You can also block noncompliant endpoint devices or give them only restricted access. This process is called network access control (NAC).

Application security

Software you use for running your business will have to be protected. Unfortunately, any application may contain vulnerabilities or holes, that can be used by attackers to infiltrate your network. Application security encompasses the software, hardware, and processes you use to close those holes.

Behavioral analytics

Behavioral analytics tools have the potential to automatically discern activities that deviate from the norm. Your security team will be able to easily identify indicators of compromise that pose a potential problem and rapidly remediate threats.

Antivirus and antimalware software

Sometimes it is possible for malware to infect a network and be dormant for days or even weeks. The most efficient antimalware programs scan for malware upon entry and also continuously track files in order to find anomalies, fix damage, and remove malware.

Data loss prevention

It is essential for organizations to ensure that their staff does not send sensitive information outside the network. Data loss prevention (DLP) technologies are capable of stopping people from forwarding, uploading, or even printing vital information in an unsafe manner.

Email security

Email gateways are considered to be a leading threat vector for a security breach. Attackers use social engineering tactics and personal information to build sophisticated phishing campaigns in order to deceive recipients and direct them to sites serving up malware. An email security application can block incoming attacks and control outgoing messages to prevent the loss of sensitive data.

Mobile device security

Mobile devices and apps are now majorly being targeted by cybercriminals. You need to control which devices can access your network and also configure their connections to keep network traffic private.

Network segmentation

Software-defined segmentation places network traffic into different categories and makes implementing security policies easier. You will be able to assign access rights based on location, role, and more so that the correct level of access is given to the correct people and suspicious devices are indeed restrained and remediated.

Security information and event management

SIEM products bring together the information required by your security staff in order to identify and respond to threats. These products are available in various forms, including server software, and virtual and physical appliances.


Firewalls create a barrier between your untrusted outside networks and trusted internal network. They employ a set of defined rules to block or allow traffic.

Intrusion prevention systems

An intrusion prevention system (IPS) is responsible for scanning network traffic to actively block attacks.

Web security

A web security solution that helps to protect your own website has the potential to block web-based threats, deny access to malicious websites, and control your staff’s web use. It protects your web gateway in the cloud or on site.

Wireless security

Wireless networks are not as secure as the wired networks. You will need rigorous security measures to install a wireless LAN. Products will have to be specifically designed to protect a wireless network in order to prevent an exploit from taking hold.


A virtual private network (VPN) has the potential to encrypt the connection from an endpoint to a network, mostly over the Internet. A remote-access VPN typically uses IPsec or Secure Sockets Layer to authenticate the communication between network and device.

Importance of Network Security

Network security will allow your company to experience business benefits. It protects your company against business disruption and also helps keep employees productive. With network security, your company will be able to meet mandatory regulations. On the whole, network security is important as it reduces the risk of legal action from data theft by helping to protect your customers' data.

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