Ipv4 vs Ipv6

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IPv4 vs. IPv6
Dorina Dibra South Eastern European University dorina.dibra@gmail.com

Network improvement has become follower in today’s modern life. The more we work the more we are affected to network and thus normally having always new requirements. To implement more efficient methods is needed first to predicate them. This predication needs to be developed before the requirements are very high. Users always expect more from networking while they compare old and current methods they’re working on. If network improvement performs poorly it would damage many businesses, consumer satisfaction etc, thus forthcoming of network should always be improved and not go down. One of the greatest improvements made on network field was inventing a new version of Internet Protocol (version 6), which in comparison with the current Internet Protocol - Version 4, provides more internet growth and in number of users 1 and functionality. the possibility for each device to have a permanent IP. Since there are more than 4 million computer devices involved on network communication, IP addresses must change time after time in order to give an IP address to every new user that enters the network that time. This problem was solved revealing newer version of Internet Protocol providing more IP addresses, called Internet Protocol Version 6 - IPv6. Developed on 1995, it was a new version of the Internet Protocol, designed as a successor to IP 3 version 4 (IPv4). Although this technology was fond it is still not implemented but is obvious that the future of networking and Internet technology will use IPv6 on their IT infrastructure.




General terms:
IT, Internet Protocol, Packed-switching, QoS (quality of service), multicasting, latency, ATM (Asynchronous Transfer Mode).

Internet Protocol is the common “language” that computer devices use to communicate 2 between each-other over the internet. It is the most widely-used method for transporting data within and between communications networks. What today’s internet supports are Internet Protocols Version 4 – IPv4. It provides only 4 billion of IP addresses which means that limits

Every device that participate network communication has a numerical denomi-nation which utilizes Internet Protocol to enable packed-switching between computers. It is a connectionless service; means that every packed is treated independently having no relationship with others. They don’t follow the same road to travel to the destination point. Internet Protocol operates in Internet Layer of TCP/IP Model which corresponds to Network Layer of the OSI Model. See figure 1. The two basic functions that internet protocols provide are: addressing and 4 fragmentation.


2.1 Internet Protocol Version 4 The Internet Protocol Version 4 was 9 implemented in 1981 by Internet Engineering Task Force (IETF), an organization which develops internet standards. As we mentioned above it operates on best effort delivery and it doesn’t guarantee for delivery, ordered sequencing or eliminate double delivering. All these functions are performed by the next layer which Transport Layer. What IPv4 performs is the header which contains the checksum. IPv4 addresses are written in dot-decimal notation. This means they are divided in four parts, consisting of 8 bits each one. See figure below:

Fig 1. Internet Layer, which recognizes only IP.


As the packets are flowing between networks, internet protocols care for them to be routed on the right place. That’s why IP addresses are used: to identify the location of sender and the 6 destination point. In network infrastructure routers during the transmission simply forward packets from source to destination point. Internet Protocol provides only best effort delivery, which means that it doesn’t guarantee that data are delivered and guarantee any level of QoS. Because of this network can’t be reliable enough. Neither...
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