Network Address Translation ( Nat ) Essay

NAT also known as Network Address Translation is a method that is utilized by network administrators in setting up IP addresses for network transmission. Network Address Translation allows a piece of network equipment such as a router to behave in such a way as a negotiator amidst public and private networks. Network Address Translation allows the ability for organizations and users at home to utilize an individual IP address that constitutes as a whole collection of computers operating an entire public domain. In the translations section of the Network Address Translation scheme, where the private and public addressing comes into play, it permits a computer or a set of computers that are already configured with inside addresses to be

The popularity of Internet has become ubiquitous and pervasive all over the world. The Internet plays a pivotal role in all walks of human life and has improved the quality of people life and has invaded all sectors like Governmental Organizations, Science and Technology, Business World, Industry and Education. In 1969, the Internet was originated by US Department of Defense (DoD) and Advanced Research Project (ARPANET) using Network Control Program (NCP). Research on packet switching communication methodology resulted in inter-networking of networks in 1981, when the researchers in Great Britain and Norway tried to collaborate with the researchers in US using Internet Protocol (IP). Realizing the importance and advantages of IP, the Internet

With the rapid growth of the Internet after commercialization in the 1990s, it became evident that far more addresses than the IPv4 address space has available were necessary to connect new devices in the future. By 1998, the Internet Engineering Task Force (IETF) had formalized the successor protocol. IPv6 uses a 128-bit address, allowing 2128, or approximately 3.4×1038 addresses, or more than 7.9×1028 times as many as IPv4, which uses 32-bit addresses and provides approximately 4.3 billion addresses. The two protocols are not designed to beinteroperable, complicating the transition to IPv6. However, several IPv6 transition mechanisms have been devised to permit communication between IPv4 and IPv6

IP addresses can be used by more than one system, reducing the total number of IP addresses needed. This conservation of addresses is important because the Internet is quickly running out of IPv4 addresses. Although a particular IP address can be used by only one system at a time, many enduser systems require addresses only occasionally, when they connect to the Internet. By reusing IP addresses, DHCP lengthens the life of the IPv4 protocol. DHCP applies to IPv4 only, as IPv6 forces systems to configure their IP addresses automatically (called autoconfiguration) when they connect to a network (page 373).

For example the way a Router communicates to a computer is through an IP address which is assigned by the router which will then find the computer and transmit information to and from the computer.

7. Describe the difference between public and private IP addresses. If a network is using

Firewalls are set up on computers to help protect computers and other devices from attacks from potentially harmful websites and other resources. Proxies are servers that act as a middle man for computers. They allow users to make indirect connections to other servers. The LAN-to-WAN domain is where the infrastructure connects to the Internet. Updates, firewalls and proxies will help to keep things running and help to keep it protected.

The Internet is, quite literally, a network of networks. It is comprised of ten thousands of interconnected networks spanning the globe. The computers that form the Internet range from huge mainframes in research establishments to modest PCs in people's homes and offices. Despite the recent hype, the Internet is not a new phenomenon. Its roots lie in a collection of computers that were linked together in the 1970s to form the US Department of Defense's communications systems. Fearing the consequences of nuclear attack, there was no central computer holding vast amounts of data, rather the information was dispersed across thousands of machines. A set of rules, of protocols, known as TCP/IP was

This is a security system that was executed in software or hardware that is used to prevent unauthorised access to or from an intranet which is a private network, firewalls are frequently used during that time. They work by filtering packets of data as they enter or leave the network, on the other hand they apply security to some particular applications, firewalls are like the front line for defence, they make sure that everything is secure before they allow anyone to enter or leave the network, which can help keep not only the computers but also the organisations and information safe.

A firewall is a system designed to prevent unauthorized access to or from a private network. You can implement a firewall in either hardware or software form, or a combination of both. Firewalls prevent unauthorized Internet users from accessing private networks connected to the Internet, especially intranets. All messages entering or leaving the intranet (i.e., the local network to which you are connected) must pass through the firewall, which examines each message and blocks those that do not meet the specified security criteria. In protecting private information, a firewall is considered a first line of defense; it cannot be the only line of defense. Firewalls are generally designed to protect network traffic and connections, and therefore do not attempt to authenticate individual users when determining who can access a particular computer or network. Furthermore, firewalls can be set up to prevent employees from accessing certain content or downloading

To outface this problem Network Address Translation (NAT) method is used. This enables devices with private addresses to be connected to a public network address (e.g. Internet). This private address is converted to legal IP address, through NAT routers before traveling 11 “outside”. (See figure 4). Every device that is connected to the network has a unique IP address but this doesn’t mean that is permanent. Because devices connected to the network,

For each received frame, use the data-link trailer frame check sequence (FCS) field to ensure that the frame has no errors; if errors occurred, discard the frame (and do not continue to the next step).

The world of technology is dynamic. Technology has been revolutionized to its current status of industry four. This has seen various changes in the information technology, in the previous time the Internet Protocol 4 (IPV 4) was used to identify the IP address. Times have changes leading to the development of IPV 6 which can handle multiple addresses at a time. The IPV 6 handles 3.4 x 1038 addresses at a single time. This recommendable since the world has evolved to use of digital systems that require IP addresses every time. This paper explains the effects of technology developments, benefits and the flaws involved. The development of technology has been used in various industrial fields that include, industrial production, aquatic study, and research, smart lighting among others.

The TCP/IP protocols are the heart and soul of the Internet, and they describe the fundamental rules that govern all communications in the network. The original address system of the Internet is Internet Protocol version 4 (IPv4). The Internet Engineering Task Force (IETF) developed IPv6 to deal with the long-anticipated problem of IPv4 address exhaustion. However, IPv6 is not foreseen to supplant IPv4 instantaneously.

When connecting your internal network to the internet the need route the packets between the two networks happens inside a router. This translation between the two different networks is known as network address translation (NAT). There are advantages when using NAT as well as disadvantages to the end user, network administrators and overall functionality of the network. We also have to understand the differences between IPv4, IPv6, and the need for NAT in each as they are different protocols and will operate differently ("Network Address Translation," 2015).