CCNA / CCNP candidates are going to be drilled by Cisco when it comes to troubleshooting questions. You’re going to have to be able to analyze configurations to see what the problem is (and if there is a problem in the first place), determine the meaning of different debug outputs, and show the ability not just to configure a router…
Tag: Router
Tips For Securing Your Home Wifi Network
As consumers upgrade their computers and laptops and are discovering the convenience of wireless computing, they may also be opening themselves up to attacks from random hackers. If you have a home network and it has wireless capabilities one of the most important things you can do to protect yourself, your computers and most importantly your data, is to secure…
Define Port Forwarding
Port forwarding, often referred to as .tunnelling. is the forwarding of network ports from one network device to another. This is commonly done using a NAT (network address translation) enabled router or server and another computer within the local network. The main purpose of using port forwarding is to allow hosts outside your local network who doesn.t have their own…
Cisco Ccna Ccnp Certification Tutorial Frame Relay End To End Keepalives
One of the first things you learned about Frame is that the LMI also serves as a keepalive, or a heartbeat – and if three consecutive LMIs are missed, the line protocol goes down. There’s a limitation to LMI as a keepalive, though. The LMI is exchanged only between the DTE and the closest DCE. The LMI is therefore a…
Cisco Ccnp Certification Bsci Exam Tutorial Comparing Irdp And Hsrp
To pass the BSCI exam, you need to know the difference between IRDP and HSRP. While they have the same basic function, the operation and configuration of each are totally different. The aim of both is to allow hosts to quickly discover a standby router when the primary router fails. IRDP is commonly used by Windows DHCP clients and several…
Ccnp Certification Bcmsn Exam Tutorial Getting Started With Hsrp
Defined in RFC 2281, HSRP is a Cisco-proprietary protocol in which routers are put into an HSRP router group. Along with dynamic routing protocols and STP, HSRP is considered a high-availability network service, since all three have an almost immediate cutover to a secondary path when the primary path is unavailable. One of the routers will be selected as the…
Cisco Ccnp Bsci Exam Tutorial Configuring And Troubleshooting Ospf Virtual Links
Knowing when and how to create an OSPF virtual link is an essential skill for BSCI and CCNP exam success, not to mention how important it can be on your job! As a CCNA and CCNP candidate, you know the theory of virtual links, so let’s take a look at how to configure a virtual link, as well as some…
Configuring Basic Cisco Router Security
Network security is a hot topic today, and will only increase in importance in the months and years ahead. While most of the attention is paid to exterior threats, there are some steps you can take to prevent unwanted Cisco router access from within your organization. Whether you want to limit what certain users can do and run on your…
Cisco Ccnp Certification Bsci Exam Tutorial Isis Hellos And Adjacencies
In my last ISIS tutorial, I mentioned that while ISIS and OSPF are both link state protocols, their actual operation differs greatly. To pass the BSCI exam and earn your CCNP, you’ll need to know these differences! Today, we’ll take a look at ISIS Hello types and the adjacency types that form through the use of these Hellos. Hello packets…
Cisco Ccna Exam Tutorial A Guide To Ram Rom Nvram And Flash
CCNA exam success depends on knowing the details, and nowhere is this more true than knowing the various components of a Cisco router. This is also where you can quickly start drowning in acronyms! The terms “RAM” and “ROM” probably aren’t new to you, but keeping up with “what goes where” with RAM, ROM, NVRAM, and Flash Memory can be…