👉Subscribe to our new channel:null Varun sir explains What is Firewalls and How it Works is described in this video. A Firewall is a network security device that monitors and filters incoming and outgoing network traffic based on an organization's previously established security policies. Firewalls(Network Security) 1) Monitors and controls Incoming and outgoing traffic based on predefined rules. 2) Acts like a barrier. 3) Host based and Network based firewall. 0:00 - Firewall 5:05 - Packet Filtering Firewall ►Computer Networks (Complete Playlist):    • Computer Networks (Complete Playlist)   Other subject-wise playlist Links: -------------------------------------------------------------------------------------------------------------------------------------- ►Design and Analysis of algorithms (DAA):    • Design and Analysis of algorithms (DAA)   ►Database Management System:    • DBMS (Database Management system) Com...   ► Theory of Computation    • TOC(Theory of Computation)   ►Artificial Intelligence:    • Artificial Intelligence (Complete Pla...   ►Computer Architecture:    • Computer Organization and Architectur...   ►Operating System:    • Operating System (Complete Playlist)   ►Structured Query Language (SQL):    • Structured Query Language (SQL)   ►Discrete Mathematics:    • Discrete Mathematics   ►Compiler Design:    • Compiler Design (Complete Playlist)   ►Number System:    • Number system   ►Cloud Computing & BIG Data:    • Cloud Computing & BIG Data   ►Software Engineering:    • Software Engineering   ►Data Structure:    • Data Structure   ►Graph Theory:    • Graph Theory   ►Programming in C:    • C Programming   ►Digital Logic:    • Digital Logic (Complete Playlist)   --------------------------------------------------------------------------------------------------------------------------------------- Our social media Links: ► Subscribe to us on YouTube: null ►Subscribe to our new channel: null ► Like our page on Facebook: https://www.facebook.com/gatesmashers ► Follow us on Instagram: https://www.instagram.com/gate.smashers ► Follow us on Instagram: https://www.instagram.com/varunainashots ► Follow us on Telegram: https://t.me/gatesmashersofficial ► Follow us on Threads: https://www.threads.net/@gate.smashers -------------------------------------------------------------------------------------------------------------------------------------- ►For Any Query, Suggestion or notes contribution: Email us at: gatesmashers2018@gmail.com #Firewalls#NetworkSecurity