What is the difference between network security and endpoint security?

Network security focuses on controlling and inspecting traffic between devices and across infrastructure. Endpoint security focuses on protecting individual devices such as laptops, servers, and phones. The two disciplines overlap but use different tools and cover different attack surfaces.

What tools are used in network security?

Common tools include firewalls, intrusion detection and prevention systems, network access control solutions, Zero Trust Network Access platforms, VPNs, and network detection and response products. Some environments also use wireless monitoring tools and network sandboxing.

Is Zero Trust the same as network security?

Zero Trust is an approach within network security, not a replacement for it. Zero Trust Network Access (ZTNA) enforces identity-based, least-privilege access to specific resources. Network security as a whole also includes firewalls, intrusion detection, segmentation, and other controls that ZTNA does not cover on its own.

What is Network Security?

Q: What is network security?

Network security is the set of tools, policies, and controls that protect a computer network and its traffic from unauthorized access, attacks, and data theft. It includes firewalls, intrusion detection, access control, traffic monitoring, and network segmentation.

Network security is the practice of protecting computer networks and the data moving across them from unauthorized access, misuse, and attack. It covers the tools, policies, and controls that defend network infrastructure, including firewalls, intrusion detection, traffic monitoring, segmentation, and secure access.

What it does

Network security tools control, inspect, and protect traffic flowing between devices, users, and services. Depending on the product, a tool in this category may:

Block or allow traffic based on IP addresses, domains, or ports using firewall rules
Monitor network packets for signs of intrusion or malicious behavior
Enforce which users and devices can reach which resources, using identity-based allowlisting or Zero Trust principles
Segment networks so that a breach in one zone cannot spread freely to others
Detect rogue or unauthorized wireless devices operating in a physical airspace
Scan hosts for known vulnerabilities and misconfigurations
Provide encrypted tunnels for remote access via VPN

Products range from simple command-line tools that manage firewall rules on a single Linux host to cloud-delivered platforms that enforce access policy across distributed users and applications.

Why teams buy it

Networks are the path attackers use to move between systems after an initial compromise. Controlling that path limits the blast radius of any breach. Specific drivers include:

Regulatory requirements that mandate perimeter controls and audit logs
Remote workforces that need secure access without exposing internal services to the internet
Operational technology (OT) environments where uncontrolled traffic can affect physical processes
The need to replace implicit trust with verified, identity-based access

What to look for

Deployment model: on-premises appliance, software agent, open-source package, or cloud-delivered service
Protocol and traffic coverage: IPv4, IPv6, wireless RF, application-layer inspection

What is Network Security?

What it does

Why teams buy it

What to look for

Common confusions

Network Security tools

Frequently asked questions