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In this chapter, you
learned how subnet masks, VLSMs, private addressing, and network
address translation can enable more efficient use of IP addresses.
You learned that hierarchical addressing allows for efficient
allocation of addresses and reduced number of routing table entries.
VLSMs, specifically, provide the capability to include more than one
subnet mask within a network and the capability to subnet an already
subnetted network address. Proper IP addressing is required to
ensure the most efficient network communications system.
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