cyberya

  Network security 1.Firewall  • A firewall is a security system that controls the flow of incoming and outgoing network traffic based on a set of rules and restrictions. Firewalls are an essential element of an organization's security infrastructure and are used to protect networks and systems from unauthorized access and malicious attacks. Types of Firewalls •  Network Firewalls:  Network firewalls are the most common type of firewall and are used to protect an entire network or organization. They are typically installed at the network perimeter and can be either hardware-based or software-based. •  Host-based Firewalls:  Host-based firewalls are installed on individual computers or servers and are used to protect those specific systems. They are typically used in addition to network firewalls to provide an additional layer of security. •  Application Firewalls:  Application firewalls are used to protect specific applications or services, such as a web server or a database. They