Internet Protocol
is a set of technical rules that define how computers communicate over a
network.
There are two types of IP which are currently use they are IPv4 and
IPv6. IPv6 is the new version of IPv4.
Lets find out what is the difference
between IPv4 and IPv6.
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IPv4
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IPv6
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Source and destination
addresses are 32 bits (4 bytes) in length.
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Source and destination
addresses are 128 bits (16 bytes) in length.
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IPSec support is
optional.
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IPSec support is
required.
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IPv4 header does not
identify packet flow for QoS handling by routers.
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IPv6 header contains
Flow Label field, which identifies packet flow for QoS handling by router.
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Both routers and the
sending host fragment packets.
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Only the sending host
fragments packets; routers do not.
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Header includes a
checksum.
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Header does not include
a checksum.
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Header includes options.
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All optional data is
moved to IPv6 extension headers.
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Address Resolution
Protocol (ARP) uses broadcast ARP Request frames to resolve an IP address to
a link-layer address.
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Multicast Neighbor
Solicitation messages resolve IP addresses to link-layer addresses.
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Internet Group
Management Protocol (IGMP) manages membership in local subnet groups.
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Multicast Listener
Discovery (MLD) messages manage membership in local subnet groups.
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ICMP Router Discovery is
used to determine the IPv4 address of the best default gateway, and it is
optional.
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ICMPv6 Router
Solicitation and Router Advertisement messages are used to determine the IP
address of the best default gateway, and they are required.
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Broadcast addresses are
used to send traffic to all nodes on a subnet.
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IPv6 uses a link-local
scope all-nodes multicast address.
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Must be configured
either manually or through DHCP.
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Does not require manual
configuration or DHCP.
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Uses host address (A)
resource records in Domain Name System (DNS) to map host names to IPv4
addresses.
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Uses host address (AAAA)
resource records in DNS to map host names to IPv6 addresses.
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Uses pointer (PTR)
resource records in the IN-ADDR.ARPA DNS domain to map IPv4 addresses to host
names.
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Uses pointer (PTR)
resource records in the IP6.ARPA DNS domain to map IPv6 addresses to host
names.
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Must support a 576-byte
packet size (possibly fragmented).
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Must support a 1280-byte
packet size (without fragmentation).
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September 26, 2012
Tags :
Technology
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