Occasionally, during your CCNA and CCNP studies, you’ll run into a term that just doesn’t quite make sense to you. (Okay, more than occasionally!) One such term is “reverse telnet”. As a Cisco certification candidate, you know that telnet is simply a protocol that allows you to remotely connect to a networking [...]
To pass the BSCI exam and move one step closer to CCNP certification success, you’ve got to know how and when to use debug commands to troubleshoot and verify network operations. While you should never practice debug commands on a production network, it’s important to get some hands-on experience with them and not rely on [...]
To pass the BSCI exam and earn your CCNP certification, you’ve got to master the (many) details of OSPF. You might have thought there were quite a few OSPF details in your CCNA studies, but you’ll now build on that foundation on the way to earning your CCNP.
One such detail is the role of the [...]
When you begin your CCNA studies, you get hit with a lot of different networking terms right away that you might not be familiar with. What makes it a little more confusing is that a lot of these terms sound a lot alike. Here, we’re going to discuss the differences between broadcasts, multicasts, and unicasts [...]
There’s nothing I enjoy more than teaching Cisco technologies, especially CCNA candidates. Whether it’s in-person or online, everyone’s excited to be there. There’s a sense of anticipation in the air, and everyone is ready to work hard, get their hands on the racks of Cisco routers and switches I
have available…
… and then I [...]
Like TCP, BGP is connection-oriented. An underlying connection between two BGP speakers is established before any routing information is exchanged. This connection takes place on TCP port 179. As with EIGRP and OSPF, keepalive messages are sent out by the BGP speakers in order to keep this relationship alive.
Once the connection is established, [...]
You don’t need me to tell you that security is the #1 concern in today’s networks. With that in mind, your career path must include some security certifications, or you will be left behind.
Cisco’s Cisco Certified Security Professional (CCSP) certification demands a candidate be well-rounded and well-versed in Cisco security measures. Besides the difficultly we’ve [...]
When studying for your BSCI exam for the CCNP, you get your first taste of BGP. One of the major differences between BGP and the other protocols you’ve studied to date is that BGP uses attributes to describe paths, and to influence the selection of one path over the other.
In this free tutorial, we’re [...]
CCNAs and CCNA candidates hear it all the time: “Get some hands-on experience”. From my personal experience climbing the Cisco certification ladder, I can tell you firsthand that there is no learning like hands-on learning. No simulator in the world is going to give you the experience you will get cabling [...]
CCNA and CCNP candidates who have their own Cisco home labs often email me about an odd situation that occurs when they erase a switch’s configuration. Their startup configuration is gone, as they expect, but the VLAN and VTP information is still there!
Sounds strange, doesn’t it? Let’s look at an example. [...]
