A redundant network is one which has some extra capacity, in case certain components fail. It is just like having a spare wheel in your car. You don't need it all the time, but it is there, just in case one of the other wheels fail.
For example, you can have more cable connections between switches or other pieces of equipment than what is absolutely required for the basic working of the network. In this case, if one connection fails, it is possible that data can still be sent over another connection.
You can also has spare switches, spare routers, or spare servers, but that is more expensive, and in some cases complicated to configure. You must weigh the cost of these equipments, against the cost of network downtime.
What does the use of redundant network components supply to a network? Reliability.
Allows for redundant links by eliminating loops.
Network Attached Storage. The word "storage" in the question is redundant, as the S in NAS is "Storage" It's an enclosure holding a large amount of RAID disk storage, which is directly attached to the network. The NAS does not need a decicated computer system to run it, as the enclosure contains the network interface card (or cards if it is connected to multiple network ports), and all of the required control circuitry.
Increased reliability
network
What does the use of redundant network components supply to a network? Reliability.
Spanning tree protocol locates all links in the network and shuts down redundant links, which stops the occurrence of network loops.
Switch loops
bus
Allows for redundant links by eliminating loops.
Redundant hardware provides enhanced reliability. Fault tolerance is a measure of reliability. The longer the MTBF, the greater the reliability.
If you look at redundant networks in nature, like the network of the veins within a leaf you may realize that redundancy creates resilience. Often leaves are subjected to parasites or physical damage. If a vital vein is struck in a network without redundancy it would mean all tissues or nodes which it previously fed into would be effectively annihilated from the network (death). A redundant network overcomes this problem by spreading out the risk. From a Computational standpoint this would be the same problem. Often critical layers of a network if left without connectivity would create critical failures for parts of the network which may be dependent on its activity. Such is the nature of hierarchy.
What you're looking for - is a RAID network. RAID stands for either redundant array (of) inexpensive disks or redundant array of independent disks) There is a comprehensive article on Wikipedia on how the system works.
Nothing should happen; that is reason you have fully redundant links, in case a link fails.
1.easy to expand 2.mesh network in which multiple redundant links exist between multiple nodes
it is passive redundant...
A and B are redundant. There is redundancy between A and B.Both "with" and "to" are awkward, if not incorrect.