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User:Pavithrans/Addressing Schemes

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Addressing Schemes

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We look at 3 ways of addressing , coming from bottom layer the order is

  • MAC Address
  • IP Address
  • Domain Name/ Address/Location

Readablity

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The most readable (human) of all the three addresses is the Domain names , they can easily be remembered . Domain names when loooked up in a DNS server would give and IP address which when looked up in the final router should lead to the MAC address which we could atleast assume ( if not spoofed ) as a valid unique identifier for the computer .

Direct access

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With an IP address one can directly contact the computer instead of using domain name service , it removes the extra work of address resolution .

Physical Connection

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With a MAC address the ethernet frame could reach the destination , its raw and is the fastest way provided you are one same physical network and you dont neeed any upper level protocols

Limited Identity

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IP address on version 4 offers a very limited set of addresses which means there is a limited way of contacting a machine directly , we use Network Adddress Translation (NAT) instead . The version 6 solves the issue by making the address space 128 bits in version 6 from 32 of version 4 .