Exercise :: Network Address Translation - Network Address Translation
Show
A private IP address is an IP address that's reserved for internal use behind a router or other Network Address Translation (NAT) device, apart from the public. These are in contrast to public IP addresses, which are public and can't be used within a home or business network. Sometimes a private address is also referred to as a local IP address. Jie En Lee / LifewireWhich IP Addresses Are Private?The Internet Assigned Numbers Authority (IANA) reserves the following IP address blocks for use as private IP addresses:
The first set allows for over 16 million addresses, the second for over 1 million, and over 65,000 for the last range. Another range of private IP addresses is 169.254.0.0 to 169.254.255.255, but those are for Automatic Private IP Addressing (APIPA) use only. In 2012, the IANA allocated 4 million addresses of 100.64.0.0/10 for use in carrier-grade NAT environments. Why Private IP Addresses Are UsedInstead of having devices inside a home or business network each use a public IP address, of which there's a limited supply, private IP addresses provide an entirely separate set of addresses that allow access on a network but without taking up a public IP address space. For example, most routers in homes and businesses across the globe have the IP address of 192.168.1.1, and assign 192.168.1.2, 192.168.1.3, ... to the various devices that connect to it (using DHCP). It doesn't matter how many routers use the 192.168.1.1 address, or how many dozens or hundreds of devices inside that network share IP addresses with users of other networks because they aren't communicating with each other directly. Instead, the devices in a network use the router to translate requests through the public IP address, which can communicate with other public IP addresses and eventually to other local networks. The hardware within a specific network that's using a private IP address can communicate with all the other hardware within the confines of that network but require a router to communicate with devices outside the network, after which the public IP address is used for the communication. For example, before landing on this page, your device (such as a computer or phone), which uses a private IP address, requested this page through a router, which has a public IP address. Once the request was made and Lifewire responded to deliver the page, it was downloaded to your device through a public IP address before reaching your router, after which it was handed off to your private/local address to reach your device. All the devices (laptops, desktops, phones, tablets, and others) that are contained within private networks around the world can use a private IP address with virtually no limitation, which can't be said for public IP addresses. Private IP addresses also provide a way for devices that don't need a connection to the internet, such as file servers and printers, to communicate with the other devices on a network without being directly exposed to the public. Reserved IP AddressesAnother set of IP addresses that are restricted even further are called reserved IP addresses. These are similar to private IP addresses in the sense that they can't be used to communicate on the internet, but they're even more restrictive than that. The most famous reserved IP is 127.0.0.1. This address is called the loopback address and is used to test the network adapter or integrated chip. No traffic addressed to 127.0.0.1 is sent over the local network or public internet. Technically, the entire range from 127.0.0.0 to 127.255.255.255 is reserved for loopback purposes, but you'll almost never see anything but 127.0.0.1 used in the real world. Addresses in the range from 0.0.0.0 to 0.255.255.255 are also reserved but don't do anything at all. If you're even able to assign a device an IP address in this range, it will not function properly no matter where on the network it's installed. How to Find Your Private IP AddressKnowing your private IP address is only helpful in specific, and for most people rare, situations. If you want to connect one computer to another on your network, for example, a mapped network drive, you can do so through its local IP address. You can also use a local IP address with remote desktop software to control a computer from afar. A private IP address is also needed to direct a specific network port from a router to a particular computer on the same network, a process called port forwarding. The easiest way to find your private IP address in Windows is to use Command Prompt with the ipconfig command. More Information on Private IP AddressesWhen a device such as a router is plugged in, it receives a public IP address from an ISP. It's the devices that connect to the router that are given private addresses. Private IP addresses can't communicate directly with a public IP address. This means if a device that has a private IP address is connected directly to the internet, and therefore becomes non-routable, the device will have no network connection until the address is translated into a working address through a NAT, or until the requests it sends are sent through a device that does have a valid public IP address. All traffic from the internet can interact with a router. This is true for everything from regular HTTP traffic to FTP and RDP. However, because private IP addresses are hidden behind a router, the router must know which IP address it should forward information to if you want an FTP server to be set up on a home network. For this to work properly for private IP addresses, port forwarding must be set up. Forwarding one or more ports to a specific private IP address involves logging into the router to access its settings, and then choosing which ports to forward and to where they should go. FAQ
Thanks for letting us know! Get the Latest Tech News Delivered Every Day Subscribe Which of the following is considered to be the address after translation of your private host?The Inside Global is the source host address used after translation to go to the Internet; it is also referred as the Internet Address. The Outside Global is the address of the outside destination host. The local addresses are the ones used before NAT translation.
Which IP address is a private IP address?A private IP address is the address your network router assigns to your device. Each device within the same network is assigned a unique private IP address (sometimes called a private network address) — this is how devices on the same internal network talk to each other.
Which of the following is used to translate private IP addresses to public IP addresses?Network Address Translation (NAT) is a protocol that translates public IP addresses to private IP addresses and private addresses back to public. You'll often see NAT enabled on an Internet-facing firewall.
What is the translated IP address?A Network Address Translation (NAT) is the process of mapping an internet protocol (IP) address to another by changing the header of IP packets while in transit via a router. This helps to improve security and decrease the number of IP addresses an organization needs.
|
Which of the following considered to be the address when your private IP is translated?
zusammenhängende Posts
Urheberrechte © © 2024 toptenid.com Inc.
