Posts tagged “CCNA Study Guide”
10 Things You Must Know About Link-State Routing Protocols
Routing protocols are able to dynamically update and talk to each other about changes that may occur in a network, such as a link going down. The beauty of this is that, if designed properly, redundant links can quickly be found with out the network going down or users even knowing there is an issue. [...]
RIPv2 Explained
The Need For Routing Protocols
Routers within a network use routing protocols to talk with one another so that updates and changes to the network can be adapted to dynamically without any major involvement from the network administrator. A router in a network has a routing table so that it can keep track of where his fellow routers are. It is like his contact list or address book. If routing protocols didn’t exist we would have to configure static routes manually to each router in the network on every single router. This can be a lot of work if you have a lot of routers. If you only have static routes and one of your links goes down in the middle of your network there is no real way for the routers to update each other on the status of the broken link. YOU, the network administrator, will have to go into every single router on the network and remove the bad link and define an alternate route. Again, this can be a lot of work if you have a lot of routers in your network creating a lot of down time.
Using a routing protocol will solve this issue of having to do all this manual work every time there is a change in your network. In the rest of this article we are going to focus on RIPv1 and its predicesor RIPv2, but there are several other routing protocols that we will learn about later for the ICND2 Exam and the CCNA Exam. RIP is a great tool to learn about routing protocols because it is simple to understand and easy to configure. Other routing protocols like EIGRP, OSPF and IS-IS are more advanced than RIP, but build upon RIP’s core functionality. We focus on learning RIP first because it builds a solid foundation of Routing Protocol knowledge that will make learning more advanced routing protocols much easier. For the ICND1 Exam you will need to know everything about RIPv2 (and RIPv1), and have only basic understanding for EIGRP, OSPF, and IS-IS.
So, what is a routing protocol? Basically it is a language or format that routers use to communicate with each other, so that they can automatically learn about new routes and make new routing dicisions incase a link goes down somewhere in the network. Having this ability to automatically make decisions can help keep your network running smoothly even when problems arise (Smoothly will depend largely on if you have redundant links in your network or not).
How to connect your iMac to your cisco router
I used to have a very old pentium II laptop that I saved because it was my only computer that had a serial port that I could use to connect to my Cisco router via a console cable. Well, a few months ago I got rid of my old laptop and now I only have [...]
Network Simulator Update – See a list of available commands
In this video update today about my online network simulator progress I just wanted to show you the ‘?’ command that will allow you to see a list of available commands.
Network Simulator Update – Enable Secret
Today I worked on some more little things with the enable password and enable secret commands. Check out the video to see it in action!
Network Simulator Update – Enable Password
Security is very important on cisco routers and you need a way to protect your passwords so today I’ve been working on getting the ‘enable password’ command working in my online network simulator. I spent a couple of hours on it today, but I’m still not finished with it yet. Hopefully I can figure out [...]
Network Simulator Update – My Hot Office
My new office is in our new apartment is in our master closet, which is way better than having no office like in our old apartment, but now I’m battling heat issues since there are no air conditioner vents in here. Anyways enough about me and my hot office, I just wanted to let you [...]
Network Simulator Update – Keeping Track of Interfaces
Today I was able to fix some things with switching between s0 and e0 while keeping track of which interface you are really in. I also worked on some settings for the show cdp and show cdp neighbors command. As you can see from the picture on the left that I got the enable secret [...]
Network Simulator Update – Little Cosmetic Issues
So, moving sucked like it always does. I’m glad it is over with though and for the most part we are all settled in. We moved from a 1 bedroom to a 2 bedroom apartment with a garage for only like $50 more than our last place. And we have a huge walkin closet that [...]
Network Simulator Update – More With Configuring Multiple Interfaces
I updated some more things when configuring multiple interfaces. I’m going to go to bed now because I’m moving into my new apartment tomorrow afternoon and I need to wake up at 4:00 am so that I can get 8 hours in at work and come home early.