Today, nearly all strategic decision-making, confidential business-critical information, and sensitive data travel across networks and systems. Modern enterprises heavily rely on networks for swift communication, collaboration, and serving customers across borders.
The ever-expanding threat landscape that’s riddled with cyberattacks, evolving threats, and regulatory pressure demands that business executives understand the crucial need to fortify network defense. This is where network security becomes essential to protect digital infrastructure, secure sensitive data flows across networks, and ensure operational continuity.
What is Network Security?
Gartner defines network security as measures taken to protect a communications pathway from unauthorized access to, and accidental or willful interference with, regular operations.
Network security is a multi-layered approach that integrates modern tools, automated processes, and industry-wide best practices to protect the confidentiality, integrity, and availability of the organization’s digital infrastructure and sensitive data flows across the network from unauthorized access, misuse, or cyberattacks.
A robust network security ensures that sensitive data is protected at all times when it is being relayed through the network’s endpoints and connected devices. This is crucial to comply with regulatory requirements, ensure cyber resilience, maintain business continuity without disruptions and improve stakeholder confidence.
How Does Network Security Work?
Network security works by utilizing multiple layers of privacy controls that are applied on the network and the internal business environment. These layers are a set of rules and controls that work together to regulate secure access and transfer on the network. They also provide network operators with transparency and visibility into network traffic and user identity.
Core components of network security include:
a. Deploying a Secure Network Architecture
The network isn’t a single standalone system but a complex web of interconnected devices with multiple hooks and endpoints. A secure network architecture deploys layer-wise controls across interconnected systems, ensuring that if one is compromised, others don’t follow the same route.
b. Real-Time Network Traffic Inspection
Network security is nothing without real-time threat detection and remediation. It works by analyzing incoming and outgoing traffic, detecting abnormal patterns, and setting dynamic rules to assess whether a particular network traffic is authorized.
c. Authenticate and Authorize Sessions
Humans are the weakest link in the cybersecurity chain. Network security bypasses this shortcoming by adopting a strict role-based access protocol that verifies identities and limits access to resources based on operational requirements.
Types of Network Security
There are several types of network security categories designed to protect an organization’s digital infrastructure from cyber threats, unauthorized access, and operational disruptions. When deployed together, these security categories build a multi-tiered data security posture that minimizes risk, navigates the threat vector, and ensures the secure flow of information across on-premises, cloud, and hybrid environments.
Among several types of network security, the most common include:
a. Network Firewall
A firewall is a barrier that monitors and filters any incoming and outgoing traffic based on security rules. It blocks harmful data from entering the network to keep it secure from malicious actors.
b. Data Encryption
Encryption scrambles data into gibberish information in transit and at rest so that even if it’s intercepted, it can’t be read without the proper decryption key. Protocols like SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are commonly used to secure data.
c. Access Control
Based on the zero-trust model, access control ensures that only authorized individuals and authorized devices can access specific network resources. This can be done typically via Identity and Access Management (IAM).
d. Threat Detection and Prevention
A secure network is nothing without real-time monitoring for malicious activity and engaging in threat detection and prevention. Tools like Endpoint Detection and Response (EDR) and Intrusion Detection/Prevention Systems (IDS/IPS) monitor network traffic and keep it secure.
e. Network Segmentation
Network Segmentation secures network traffic by dividing a computer network into small, isolated segments or subnetworks to minimize the dissemination of a cyberattack. This process significantly enhances network security as well as improves network performance.
Benefits of Network Security
Network security isn’t just about securing the network. It extends to providing businesses with scalability, network stability, and long-term stakeholder confidence. A modern, well-governed network security provides businesses with several benefits, including:
a. Securing Critical Business Assets
When a network is secure, any and all information flowing through the network is at reduced risk of exposure. Businesses can confidently engage in data flows, including sensitive data, across on-premises, cloud, and hybrid environments.
b. Improved Operational Continuity & Visibility
Network security prevents operational disruptions caused by cyberattacks such as DDoS attacks and malicious interceptors hogging network traffic, and causing network outages. Centralized monitoring provides network operators with improved visibility to detect anomalies and address incoming threats in real-time.
c. Strengthens Regulatory and Compliance Posture
Data privacy laws are evolving at unprecedented speeds, necessitating organizations to be better custodians of consumer data by implementing adequate security measures that minimize the chances of inadvertent data exposure. Laws like GDPR, CCPA/CPRA, HIPAA, PCI-DSS, and others impose severe noncompliance penalties.
5 Best Practices for Network Security
A robust network security program requires the implementation of best practices to strengthen the organization’s overall network security posture. Although several, among the top 5 include:
a. Implement a Zero Trust Security Model
This is by far the most underrated practice, but the most crucial one. Begin by keeping a mindset and general practice of never trusting and always verifying, regardless of whether it's coming from in-house traffic or outside the network.
b. Strict Access and Authentication Protocols
A detailed log of access activity should be maintained, and access should be granted based on role-based and the principle of least privilege. Multi-factor authentication should be enabled along with strong password policies requiring frequent password updates.
c. Network Segmentation and Firewalls
The entire network and network traffic should be divided into smaller networks, isolating critical network traffic and limiting the impact vector. Firewalls should be established to control network traffic, detect anomalies and behavior patterns that jeopardize security.
d. Keep Systems and Software Updated
Outdated systems and software are susceptible to attacks. Updates carry the necessary patches that reduce vulnerability exposure. Updates should be made across the board on devices connected to the network. Regular audits should be conducted to address risks.
e. Encrypt Data in Transit and at Rest
Part of network security is ensuring sensitive data is encrypted to prevent it from being intercepted by malicious actors. Utilize state-of-the-art Advanced Encryption Standard (AES) 256-bit to secure data both in transit and at rest.
Amplify Your Data Security Posture with Securiti
Securiti’s Data Security Posture Management provides holistic insight into the security posture of your multicloud, SaaS, on-prem, data lakes and warehouses and data streaming environments.
With Securiti, organizations can swiftly discover data assets, classify data, detect risk, and automatically remediate misconfigurations, gain insights through proactive intelligence and adopt controls safely, ensuring that sensitive data stays protected.
Request a demo to see Securiti in action.
