Answer Posted / salman masood

1. IPv4 is 32 bits IP address
2. IPv4 can support up to 232 addresses
3. In Ipv4, IPSec & AH (Authentication Header)is add
ons Not present default).
4. In IPv4, there is no inbuilt QoS,
5. In IPv4 network, packet fragmentation is done by
router or layer 3 device.
6. In IPv4, ip addressing styles are unicast,
multicast & broadcast.
7. In IPv4, ARP is used to track IP to MAC.


1. IPv6 is 128 bits
2. IPv6 support up to 2128 addresses to fulfill future
needs with better security and network related features
3. In IPv6 IPSec & AH is present by default.
4. QoS in IPv6, its inbuilt.
5. In IPv6 network, packet fragmentation is done by
source node. so it reduce the router overhead.
6. In IPv6 instead of broadcast, its introduce a new
style its known as ANYCAST. (Same address for group of
devices, but packet would be sent to nearest device). So in
IPv6 we can have number of server of the same address.
7. In IPv6, NDP (Neighbor Discovery protocol) is used
for tracking IP to MAC.

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