Network security involves a combination of measures and processes that include security measures for both software and hardware aspects of networking. It aims to protect the network infrastructure from unauthorized access, misuse, damage, or disruption. This includes implementing firewalls, intrusion detection systems (IDS), intrusion prevention systems (IPS), antivirus software, and applying encryption to ensure that data transmitted over the network is secure. Network security also involves regular monitoring of network traffic and vulnerability assessments to mitigate risk and respond to potential threats before they can be exploited.