Advantages And Disadvantages Of Ip V6

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The Transition from IP V4 to IP V6 2
Dual Stack Routers 2
Tunnelling 2
NAT Protocol Translation 3
The Limitations of IP V4 4
Scarcity of IP V4 Addresses 4
Security Related Issues 4
Address Configuration Related Issues 4
Quality of Service (QoS) 4
The Benefits of IP V6 5
More Efficient Routing 5
More Efficient Packet Processing 5
Directed Data Flows 5
Simplified Network Configuration 5
Support for New Services 5
Security 6
Fields & Functions of the IP V6 Header 7
Fixed Header 7
Extension Headers 8
Comparison Between IP V4 & IP V6 9

The Transition from IP V4 to IP V6
IP V6 was launched on June 6, 2012, in conjunction with many large companies and organisations when they held World IP V6 Launch Day, which was
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The design of IP V4 did not anticipate the growth of internet and created many issues, which proved that IP V4 needed to be changed. Below are some of the limitations of IP V4:
Scarcity of IP V4 Addresses
IP V4 uses a 32-bit address space, and is classified to usable Class A, B, & C. 32-bit address space only allowed for 4,294,967,296 IP V4 addresses, but the IP V4 allocation practices limit the number of available public IP V4 addresses.
Security Related Issues
IP V4 was published in 1981, and the current network security threats were not anticipated at that time. Internet Protocol Security (IPSec) is a protocol which enables network security by protecting the data being unwantedly sent from being modified or viewed. IPSec is not a built-in feature in IP V4, and is rather a optional feature.
Address Configuration Related Issues
The internet and networks are expanding as many new computers and devices are being used. The configuration of both static and dynamic IP addresses should be simpler.
Quality of Service
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Comparison Between IP V4 & IP V6
Addressed are 32-bit in length Addressed are 128-bit in length
Binary numbers represented in decimal Binary numbers represented in hexadecimals
IPSec support optional IPSec support built-in
No packet flow identification Packet flow identification is available within the IP V6 header using the Flow Label field
Fragmentation is done by sender and forwarding routers Fragmentation is only done by sender
Checksum field is available in IP V4 header Checksum not in IP V6 header
ARP is available to map IP V4 addresses to MAC Addresses ARP is replaced with a function of NDP
IGMP is used to manage multicast group membership IGMP is replaced with MLD messages
Broadcast messages are available Broadcast messages are not available, instead a link-local scope multicast IP V6 address is used for broadcast similar functionality
Manual configuration if IP V4 or DHCP is required to configure IP V4 adresses Auto configuration of addresses is available

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