Please create a discussion thread where you dissect the subject of firewalls. Your posting should contain the following information:

$(1)$ What is a Next Generation Firewall $($NGFW$)?$

$(2)$ How do you think its implementation will affect network security?

$(3)$ How does it compare to a virtual firewall?

$(4)$ As a cyber security expert, would you set up a network in your office without a firewall? Why or why not?

reference the source material$($s$)$ to support your views and opinions.