Explain the working principle of firewall & Router.

Question

Accepted Answer

Firewall filters network traffic based on predefined security rules, while router forwards data packets between computer networks.

Firewall acts as a barrier between internal network and external network, filtering incoming and outgoing traffic based on security rules.
Router forwards data packets between different computer networks, determining the best path for the packets to reach their destination.
Firewall can block specific ports or IP addresses to prevent unauthorized access, while router uses routing tables to determine the next hop for data packets.
Firewall can be hardware-based or software-based, while router is a hardware device that connects multiple networks together.
Examples: Cisco ASA firewall, Juniper SRX firewall, Cisco ISR router, Juniper MX router.

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