Explain three level heirarchy subneting in ip address
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simplest division of IP addresses is into a structure containing two elements: the network ID and the host ID. In explaining this concept, I drew an analogy to the way North American phone numbers are ten digits long, but are broken down into a three-number area code and a seven-digit local number.
As I mentioned in the preceding topic, subnetting adds an additional level to the hierarchy of structures used in IP addressing. To support this, IP addresses must be broken into three elements instead of two. This is done by leaving the network ID alone and dividing the host ID into a subnet ID and host ID. These subnet ID bits are used to identify each subnet within the network. Hosts are assigned to the subnets in whatever manner makes the most sense for that network.
Interestingly, the analogy to telephone numbers that we used before still holds in the world of subnetting, and shows how subnetting changes the way IP addresses are interpreted. A number like (401) 555-7777 has an area code (“401”) and a local number (“555-7777”) as I said before. The local number, however, can itself be broken down into two parts: the exchange (“555”) and the local extension (“7777”). This means phone numbers really are comprised of three hierarchical components just as IP addresses are in subnetting.
As I mentioned in the preceding topic, subnetting adds an additional level to the hierarchy of structures used in IP addressing. To support this, IP addresses must be broken into three elements instead of two. This is done by leaving the network ID alone and dividing the host ID into a subnet ID and host ID. These subnet ID bits are used to identify each subnet within the network. Hosts are assigned to the subnets in whatever manner makes the most sense for that network.
Interestingly, the analogy to telephone numbers that we used before still holds in the world of subnetting, and shows how subnetting changes the way IP addresses are interpreted. A number like (401) 555-7777 has an area code (“401”) and a local number (“555-7777”) as I said before. The local number, however, can itself be broken down into two parts: the exchange (“555”) and the local extension (“7777”). This means phone numbers really are comprised of three hierarchical components just as IP addresses are in subnetting.
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better Match to Physical Network Structure:Hosts can be grouped into subnets that reflect the way they are actually structured in the organization's physical network.oFlexibility:The number of subnets and number of hosts per subnet can be customized for each organization. Each can decide on its own subnet structure and change it as required. oInvisibility To Public Internet:Subnetting was implemented so that the internal division of a network into subnets is visible only within the organization; to the rest of the Internet the organization is still just one big, flat, “network”. This also means that any changes made to the internal structure are not visible outside the organization.oNo Need To Request New IP Addresses:Organizations don't have to constantly requisition more IP addresses, as they would in the workaround of using multiple small Class C blocks.oNo Routing Table Entry Proliferation:Since the subnet structure exists only within the organization, routers outside that organization know
here is your answer
better Match to Physical Network Structure:Hosts can be grouped into subnets that reflect the way they are actually structured in the organization's physical network.oFlexibility:The number of subnets and number of hosts per subnet can be customized for each organization. Each can decide on its own subnet structure and change it as required. oInvisibility To Public Internet:Subnetting was implemented so that the internal division of a network into subnets is visible only within the organization; to the rest of the Internet the organization is still just one big, flat, “network”. This also means that any changes made to the internal structure are not visible outside the organization.oNo Need To Request New IP Addresses:Organizations don't have to constantly requisition more IP addresses, as they would in the workaround of using multiple small Class C blocks.oNo Routing Table Entry Proliferation:Since the subnet structure exists only within the organization, routers outside that organization know
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