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Jim Shaw, EVP of Engineering at Crystal Group, discusses firewalls and the distinction between firewalls, switches and routers.

Video Transcript: Episode 34 – “Rugged Firewalls”

Hi Jim Shaw here, again, with Crystal Group.  Wanted to talk for a moment about firewalls, but before I do, I thought I’d just mention a little bit of an introduction to what’s the difference between a router, a switch, and a firewall, and a router is a device that essentially is the backbone of the internet.  It breaks up messages into packets and sends them into different directions; you can kind of think of it like the United States Post Office or FEDEX.  The thing about a router is, though it tends to split them up and send these packets in different directions and then they’re reassembled back at the user.

The firewall is the device that separates the trusted environment from the untrusted environment, so it kinda keeps the bad guys out of your intranet or out of your trusted network.

A switch is something that has data lines within a network, an internet, so that is essentially, once it’s inside your trusted network, it tends to spread out and make specific device connections.

This particular firewall is a Cisco® base 5515, it is, in essence, a Cisco platform that we have augmented with additional cooling and heat sinking.  This particular switch is an example of a device that has six standard ports and then SFP modules that are allowed to be added to the device.  We can add kits to this, so it’s EMI and humidity resistant.  And, also, we have AC/DC power supply applications, so this is a firewall – this is one of products that Crystal Group ruggedizes.