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Key Points Of Differences Between
IPv4 And IPv6
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IPv6 was designed as an improvement on the features of IPv4 with the
view of improving services and capabilities. This means that there are a
few differences in designing, function and output of IPv4 and IPv6. The
key differences are highlighted here:
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Size is one of the main areas of difference. While the size of an address in IPv4 is 32 bits, in IPv6, the same is of 128 bits.
IPv4 supports 4.3 billion addresses which fall short of current population expectations. With the capability to support 50 octillion addresses, IPv6 has tremendous address capability.
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The header of IPv4 has 13 fields and 20 bytes which is half of the header of IPv6 which has 40 bytes with 8 fields.
While IPv6 is devoid of any class and makes use of a prefix and an identifier ID called IPv4 network, IPv4 is sub-divided into classes A to E.
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The header of IPv4 has 13 fields and 20 bytes which is half of the header of IPv6 which has 40 bytes with 8 fields.
While IPv6 is devoid of any class and makes use of a prefix and an identifier ID called IPv4 network, IPv4 is sub-divided into classes A to E.
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IPv4 address utilizes a subnet mask whereas the IPv6 does not need any
mask. Instead, it makes use of a prefix length.
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There are security concerns with IPv4 as it was not designed to be fully secured. The original design of IPv4 was created for an isolated military network. IPv6 is a major improvement on the security features of IPv4 as it comes with an advanced in-built security system. It has authentication and encryption features to ensure foolproof operations.
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Internet Service Providers have IPv4 connectivity. In some instances, they have IPv6 connectivity too. However, most ISPs do not currently have IPv6 connectivity.
IPv4 has an unequal geographical distribution while IPv6 is not affected by any geographical limitations.
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In IPv4, you can get broadcast messages while in IPv6 these are not available. It makes use of a multi-cast address for achieving broadcast functionality.
In IPv4, manual configuration of IP addresses is done where as in IPv6 the configuration is carried out automatically.
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