A company in granted a site address 201.70.64.0. The company needs six subnets. Design the subnets.
The IPv4 address is 32 bit, which allows to allocate 232 addresses. IPv4 present two level addressing hierarchy i.e. network number and host number. Each network interface is identified with one or more unique addresses. Two level addressing hierarchy is convenient but wasteful of the address space.
If a organization is large or if its computers are geographically dispersed, it makes good sense to divide network into smaller ones, connected together by routers. The benefits for doing things this way include.
1. Reduced network traffic
2. Optimized network performance
3. Simplified network management
4. Facilities spanning large geographical distances. . If Network Information Center (NIC) assign only one network address to an organization which having multiple network, that organization has a problem. A single network address can be used to refer to multiple physical networks. An organization can request individual network address for each one of its physical networks. If these were granted, there wouldn't be enough to go around for everyone.
• Another problem is, if each router on the internet needed to know about each existing physical network, routing tables would be impossibly huge. This is physical overhead on the router. To solve this type of problem, the subnet addressing method is used. Now a simple task for students :A company in granted a site address 201.70.64.0. The company needs six subnets. Design the subnets.
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