Perimeter Router:
The perimeter router is typically a standard router providing a serial connection to the outside world and a LAN connection to the internal network. The perimeter router should provide any filtering of outside traffic to implement basic security for the dirty DMZ and preliminary filtering for the inside network. This device could be running the firewall feature set for additional security options.Internal Router:
An internal router is a router that has OSPF neighbor relationships with interfaces in the same area. An internal router has all its interfaces in a single area.Firewall:
A firewall is a device or set of devices designed to permit or deny network transmissions based on a set of rules and is frequently used to protect networks from unauthorized access while permitting legitimate communications to pass.Reference:
•http://etutorials.org/Networking/Cisco+Certified+Security+Professional+Certification/Part+II+Securing+the+Network+Perimeter/Chapter+5+Securing+Cisco+Perimeter+Routers/Perimeter+Router+Terms+and+Concepts/ •http://en.wikipedia.org/wiki/Firewall_(computing) •http://en.wikipedia.org/wiki/Open_Shortest_Path_First#Internal_router
Hi, good afternoon!
ReplyDeleteAfter reading your post of Perimeter Router, Internal Router and Firewall, I realized my post of the same topic was quite similar to yours. However, I learnt how to explain the definition of Perimeter Router, Firewall in different ways.
Your post was not too long and I felt it was very clear in terms of definition.
Some suggestions:
1. You may add in some pictures so that readers can understand the concept easier.
2. Trying to explain each term in details a bit. For example, how do we secure router/firewall or improve the performance.
You did a good job! Keep it up! :D
Hilo~~
ReplyDeleteGood explanation on the different devices although they are quite short. My own explanation seem a little different from yours, thus by reading yours, it let me understand it in different ways.
Maybe some pictures can help in allowing the readers to know how they look like.
jiayou~~ :)
I think i got a better idea of the how routers work now. Before reading the post, i did not know there were two different types of routers.
ReplyDelete