What protocol is responsible for translating link layer addresses to network layer addresses?
Most of the computer programs/applications use logical address (IP address) to send/receive messages, however, the actual communication happens over the physical address (MAC address) i.e from layer 2 of the OSI model. So our mission is to get the destination MAC address which helps in communicating with other devices. This is where ARP comes into the picture, its functionality is to translate IP address to physical addresses. Show The acronym ARP stands for Address Resolution Protocol which is one of the most important protocols of the Network layer in the OSI model. Let’s look at how ARP works. Imagine a device that wants to communicate with the other over the internet. What ARP does? Does it broadcast a packet to all the devices of the source network. The above process continues till the second last network device in the path reaches the destination where it gets validated and ARP, in turn, responds with the
destination MAC address. ARP: ARP stands for(Address Resolution Protocol). It is responsible to find the hardware address of a host from a known IP address. There are three basic ARP terms. (i) Reverse ARP (ii) Proxy ARP (iii) Inverse ARP
NOTE: An ARP request is a broadcast, and an ARP response is a Unicast. Test Yourself : Connect two PC, say A and B with a cross cable. Now you can see the working of ARP by typing these commands: There will be no entry at the table because they never communicated with each other. Now, entries of the ARP table can be seen by typing the command. This article is contributed by Vivek Reddy. If you like GeeksforGeeks and would like to contribute, you can also write an article using write.geeksforgeeks.org or mail your article to . See your article appearing on the GeeksforGeeks main page and help other Geeks. Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above. What protocol is used to translate IP addresses to link layer addresses?Address Resolution Protocol
As previously mentioned, ARP is used to translate between Internet layer addresses (IP addresses) and Link layer addresses (MAC addresses).
Which protocol is network layer protocol?The most significant protocol at layer 3 (also called the network layer) is the Internet Protocol, or IP. IP is the standard for routing packets across interconnected networks--hence, the name internet.
What protocol is used at the link layer to transfer data?Point to Point Protocol (PPP) –
PPP is a protocol that is basically used to provide same functionality as SLIP. It is most robust protocol that is used to transport other types of packets also along with IP Packets.
Which protocol helps IP to get the network layer address for host?ARP Protocol
The Address Resolution Protocol (ARP) conceptually exists between the data-link and Internet layers. ARP assists IP in directing datagrams to the appropriate receiving host by mapping Ethernet addresses (48 bits long) to known IP addresses (32 bits long).
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