After a near-miss electrical fire in the primary data center, a company's IT manager mandates that at least one backup copy be replicated to an off-site location. Which specific risk inherent in the current on-site-only backup strategy does moving a copy off-site mitigate most directly?
Unexpected wide-area-network (WAN) egress fees during a large-scale restore
Ongoing data growth that is quickly consuming the local disk shelves
Excessive recovery time because internal LAN throughput is limited
Loss of backups caused by a disaster that disables the entire facility
Keeping backups in the same physical facility as production systems makes them vulnerable to the exact disasters-fire, flood, theft, or other site-wide incidents-that can take down the primary environment. Replicating a copy to an off-site repository introduces geographic separation, so a catastrophe that destroys the data center is far less likely to destroy every backup copy as well. WAN egress charges and longer restore times are disadvantages introduced by off-site storage, not risks it removes. Likewise, adding an off-site tier does not inherently solve problems of limited LAN bandwidth or local disk capacity growth; those issues must be addressed with network upgrades or additional on-premises storage, respectively.
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What is geographic separation in data backups?
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How do WAN egress fees impact off-site backups?
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Why are local LAN throughput and capacity not addressed by off-site backups?