17 lines
719 B
Markdown
17 lines
719 B
Markdown
# IPv6
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**IPv4 has several problems:**
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- Scarce IPv4 address.
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- IPv4 header contains fields that are not used by every packet (should be optional)
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- IPv4 imposes extra processes on routers, the network can become slower (such as fragmentation and checksum calculations)
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- IPv4 does not provide any security measurement at network layer.
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**IPv6 Format:**
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![[IPV6-format.png]]
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Most of the mandatory fields of IPv4 header and some of IPv4 options are available trough IPv6 options. (Linked by next header)
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IPv6 provides encryption and authentication features.
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Routers are not allowed to perform fragmentation.
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NO Checksum calculations, error checking is already implemented in both data link layer and transport layer.
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