Data Disaster Recovery

Data can be restored immediately to either the original server or an alternate server. Restores can also be redirected to an alternate physical location if the original office is no longer available. The server disaster recovery solution lies in having devices and technologies available which allow us to restart the vital information systems in a shorter time period than the estimated critical. These mechanisms, and all the associated plans of actions, are known as data disaster recovery.

Why should I have a data back up and recovery system!
By not having a data center disaster recovery plan, you are quite simply, putting your business at risk; don't take chance with your vital data. Would you leave any other aspect of your business to chance? Not really. Always be prepared for a natural calamity or any disaster, don't leave any if's and but's, leave no stone unturned when it comes to backing up your important data. 
to be continued...click the following link.

Cisco CCNP - BSCI Tutorial: Comparing OSPF and ISIS Hellos

While studying to pass the BSCI exam and preparing to earn your CCNP certification, you'll quickly notice that while OSPF and ISIS are both link-state protocols, there are a lot of differences between the two. One major difference is the way the two protocols handle hello packets.

Hello packets are imperative to keeping OSPF and ISIS adjacencies alive. Since they are both link-state protocols, neither of them will send updates at any specified time. Hello packets are the only method by which routers running OSPF and ISIS can see that a neighboring router is still available.
to be continued... click the following link.