The Eduladder is a community of students, teachers, and programmers just interested to make you pass any exams. So we help you to solve your academic and programming questions fast.
In eduladder you can Ask,Answer,Listen,Earn and Download Questions and Question papers.
Watch related videos of your favorite subject.
Connect with students from different parts of the world.
Apply or Post Jobs, Courses ,Internships and Volunteering opportunity. For FREE
See Our team
Wondering how we keep quality?
Got unsolved questions? Ask Questions

You are here:Open notes-->Seminar-topics-and-ppt-for-engineering-->firewall


How to study this subject

A firewall provides a single point of defense between two networksóit protects one network from the other. Usually, a firewall protects the company's private network from the public or shared networks to which it is connected. A firewall can be as simple as a router that filters packets or as complex as a multi-computer, multi-router solution that combines packet filtering and application-level proxy services.

Firewall technology is a young but quickly maturing industry. The first generation of firewall architectures has been around almost as long as routers, first appearing around 1985 and coming out of Cisco's IOS software division. These firewalls are called packet filter firewalls. However, the first paper describing the screening process used by packet filter firewalls did not appear until 1988, when Jeff Mogul from Digital Equipment Corporation published his studies. During the 1989-1990 timeframe, Dave Presotto and Howard Trickey of AT&T Bell Laboratories pioneered the second generation of firewall architectures with their research in circuit relays, which are also known as circuit level firewalls. They also implemented the first working model of the third generation of firewall architectures, known as application layer firewalls.

However, they neither published any papers describing this architecture nor released a product based upon their work. As is often the case in research and development, the third generation of firewall architectures was independently researched and developed by several people across the United States during the late 1980's and early 1990's. Publications by Gene Spafford of Purdue University, Bill Cheswick of AT&T Bell Laboratories, and Marcus Ranum describing application layer firewalls first appeared during 1990 and 1991. Marcus Ranum's work received the most attention in 1991 and took the form of bastion hosts running proxy services. Ranum's work quickly evolved into the first commercial productóDigital Equipment Corporation's SEAL product.

Official Notes

Add contents here

Notes from other sources


Model question papers

Add contents here

Previous year question papers

Add contents here

Useful links

Add contents here