When you create backups of your data, you must store them somewhere where they can’t be damaged or someone else can access them. For businesses, offsite backup is a well known and popular way to backup files. It offers you several different advantages when compared to other ways, such as CD, DVD, external hard drives, and even servers. One of the biggest advantages to offsite backup is the fact that the backups aren’t stored in your office or business.
Offsite backup companies store your data in state of the art safes, to protect them against fire, flood, and even prying eyes. This can be extremely beneficial if unexpected things have a habit of occurring around your office.
Another great thing about offsite backups are the fact that they can be used as stores for your data. You won’t need to rely on online space, as you can easily go to the company who is storing your data and go through it anytime you wish. You can also use online space with most companies as well. You simply upload your data to their online storage area, then go back anytime you wish and view it. This is a very handy feature, similar to a hosting company.
Another benefit of offsite backup is the fact that your data will always be protected, and you won’t have to use CD or DVDs to do it. CD and DVD storage is great for individuals, although there will be quite a bit of them for most businesses. This can get somewhat costly, but more importantly, it will use a lot of space to store the backup files. They can also become damaged or lost, unlike offsite backup storage.
Offsite storage is also great if your business is in a bad area. If Mother Nature has a habit of bashing your area with floods, fires, or hurricanes, you should look into offsite backup storage immediately. They have ways to protect your information from harm, including anything Mother Nature can dish out. There is no need to worry about natural disasters, system failures, hard drive crashes, or data failure with offsite backup storage.
Even though you may not realize it, the data will be available anytime you need it. Online backup services are available anytime, day or night, and can be accessed anywhere you are. Most are easy to set up, and offers you very impressive security measures.
When it comes to offsite backup, you can store virtually any file you need to, such as text files, e-books, contact record, pictures, music, and anything else you can think of. The storage for online backups are virtually endless, capable of storing everything you need.
Offsite backup storage is ideal for any business or corporation. You can store your data with an online offsite backup, or choose to do it physically in an offsite safe. No matter which method of offsite backup you choose - your data will always be protected, and best of all - it will always be there anytime you need it.
Showing posts with label store. Show all posts
Showing posts with label store. Show all posts
Thursday, January 1, 2009
Wednesday, December 24, 2008
Cisco CCNA Certification: Cisco Switching Modes Tutorial
To pass the CCNA exam and earn that coveted certification, you've got to know Cisco switches inside and out. Among the many important details you've got to know are the three methods that Cisco switches use to forward frames, and the differences between the three.
The first switching method is Store-and-Forward. The name is the recipe, because that's just what the switch does - it stores the entire frame before beginning to forward it. This method allows for the greatest amount of error checking, since the Frame Check Sequence (FCS) can be run before the frame is forwarded. As always, there is a tradeoff, since this error checking process makes this the slowest of the three frame forwarding methods.
The quickest method is Cut-Through, where only the destination MAC address of the frame is examined before the forwarding process begins. This means that the part of the frame is actually being forwarded as it is still being received! The tradeoff here is that the FCS does not run, so there is absolutely no error checking with Cut-Through switching.
The middle ground between these two extremes is Fragment-Free, so named since fragmented frames will not be forwarded. The switch examines only the first 64 bytes of the frame for errors, since that is the part of the frame that will be damaged in case of a collision. There is error checking, but it is not as thorough as Store-and-Forward.
Keeping these three switching schemes straight is vital to your CCNA exam efforts, and it will help you in working with Cisco switches in the real world as well. Keep studying!
The first switching method is Store-and-Forward. The name is the recipe, because that's just what the switch does - it stores the entire frame before beginning to forward it. This method allows for the greatest amount of error checking, since the Frame Check Sequence (FCS) can be run before the frame is forwarded. As always, there is a tradeoff, since this error checking process makes this the slowest of the three frame forwarding methods.
The quickest method is Cut-Through, where only the destination MAC address of the frame is examined before the forwarding process begins. This means that the part of the frame is actually being forwarded as it is still being received! The tradeoff here is that the FCS does not run, so there is absolutely no error checking with Cut-Through switching.
The middle ground between these two extremes is Fragment-Free, so named since fragmented frames will not be forwarded. The switch examines only the first 64 bytes of the frame for errors, since that is the part of the frame that will be damaged in case of a collision. There is error checking, but it is not as thorough as Store-and-Forward.
Keeping these three switching schemes straight is vital to your CCNA exam efforts, and it will help you in working with Cisco switches in the real world as well. Keep studying!
Monday, December 22, 2008
CCNA Certification Exam Tutorial: Cisco Switching Modes
To pass the CCNA exam and earn this important certification, you’ve got to know switching inside and out. While you’re learning all the basic switching theory, make sure to spend some time with the one of three switching modes Cisco routers can use.
Store-and-Forward is exactly what it sounds like. The entire frame will be stored before it is forwarded. This mode allows for the greatest amount of error checking, since a CRC (Cyclical Redundancy Check) is run against the frame before it is forwarded. If the frame contains an error, it is discarded. If there’s no problem with the frame, the frame is then forwarded to its proper destination.
While store-and-forward does perform error checking, the delay in processing the frame while this error check is run results in higher latency than the other modes you’re about to read about. The latency time can also vary, since not all frames are the same size.
Cut-through switching copies only the destination MAC address into its memory before beginning to forward the frame. Since the frame is being forwarded as soon as the destination MAC is read, there is less latency than store-and-forward. The drawback is that there is no error checking.
There is a middle ground, fragment-free switching. Only part of the frame is copied to memory before it is forwarded, but it’s the first 64 bytes of the frame, not just the destination MAC. (Why? Because if there is a problem with the frame, it’s most likely in the first 64 bytes.) There is a little more error checking than cut-through, but not as much latency as with store-and-forward.
Note that the latency of both cut-through and fragment-free is fixed; these modes always look at the first six or 64 bytes, respectively. Store-and-forward's latency depends on the size of the frame.
Learning the similarities and differences between these modes is an often-overlooked part of CCNA studies. Spend some time studying this important CCNA topic – you’ll be glad you did!
Store-and-Forward is exactly what it sounds like. The entire frame will be stored before it is forwarded. This mode allows for the greatest amount of error checking, since a CRC (Cyclical Redundancy Check) is run against the frame before it is forwarded. If the frame contains an error, it is discarded. If there’s no problem with the frame, the frame is then forwarded to its proper destination.
While store-and-forward does perform error checking, the delay in processing the frame while this error check is run results in higher latency than the other modes you’re about to read about. The latency time can also vary, since not all frames are the same size.
Cut-through switching copies only the destination MAC address into its memory before beginning to forward the frame. Since the frame is being forwarded as soon as the destination MAC is read, there is less latency than store-and-forward. The drawback is that there is no error checking.
There is a middle ground, fragment-free switching. Only part of the frame is copied to memory before it is forwarded, but it’s the first 64 bytes of the frame, not just the destination MAC. (Why? Because if there is a problem with the frame, it’s most likely in the first 64 bytes.) There is a little more error checking than cut-through, but not as much latency as with store-and-forward.
Note that the latency of both cut-through and fragment-free is fixed; these modes always look at the first six or 64 bytes, respectively. Store-and-forward's latency depends on the size of the frame.
Learning the similarities and differences between these modes is an often-overlooked part of CCNA studies. Spend some time studying this important CCNA topic – you’ll be glad you did!
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