Introduction to ARP
ARP is Address Resolution Protocol is the Dynamic mapping technique used for mapping the logical address to a physical address, i.e. ARP accepts the logical address from the IP protocol and maps the address to the corresponding physical address and then pass it to the data link layer. It uses request and replies to perform the operations where the request is broadcast and reply is unicast. It has 16 bit of hardware type and protocol type and 8 bit of hardware length and protocol length.
What is ARP?
- ARP stands for Address Resolution Protocol. It may be defined as the protocol that is used to resolve the IP address, specially IPV4, to the hardware address. It works below under the network layer to facilitate the delivery of the message to the correct device.
- It is usual to have several devices connected to a single network. When any device from one network tries to reach any other device in the internet, it reaches that through the IP address which later resolved to get the MAC address of the device from which that first device actually wants to interact. Without making the use of this protocol, it is not possible to get the message forwarded to the correct device.
- In order to understand the concept of ARP, we can consider an example. Suppose device A wants to send any message to devise B where both of the devices are connected to a different network. The device A will send the message that will reach the router connecting the private network through which device B is connected to the public network or the internet.
- In the router, this protocol will work to decide which device the message has to be forwarded. Using this protocol the IP address and some other information send by device A will be resolved to the MAC address of device B and the message will be delivered to that device. This is the way the ARP protocol works with the coordination of other hardware devices.
How does ARP make working so easy?
Address resolution protocol is sheer useful when it comes to locating the correct device where the data has to be sent in the network. As we also discussed earlier, it plays a vital role when it comes to establishing communication through the internet. It resolves the IPV4 address into the MAC address which is the crucial part while locating any particular device in the network. Once the device has been located, there is no trouble in sending the message to it. Without the Address Resolution Protocol, it is never possible to facilitate the device to device communication. It really makes our work very easy by transforming the IP information to the MAC information. One of the important reasons for so many devices being connected throughout the internet is Address resolution protocol.
What can you do with Address Resolution Protocol?
The Address resolution protocol plays a very crucial role when it comes to facilitating the communication between device through the internet. The internet is comprised of millions of devices and it is also true that the scalability of IPV4 is not that efficient to facilitate the device to device communication. In the place where the number of IPV4 addresses available is very limited, the ARP plays a very vital role to introduce the network to network then the device to device communication. This protocol has been used to resolve the IP address using the extra details to the MAC address. These are things that we can do by making the use of the address resolution protocol.
Required Skills
In order to work with the address resolution protocols, one will need the basic idea or understanding of networking. The knowledge of the different layers is very important to learn the skill required to work with ARP. There are several layers and each is comprised of several protocols. The ARP protocol works below the network layer in order to resolve the IPV4 address to the MAC address. One should know how the internet works, what are the role of different layers and what part different devices play in order to facilitate the communication between the devices connected through the internet. The basic knowledge of other protocols can also be helpful while learning everything about this protocol.
Who is the right audience for learning this Technology?
Information technology professional who are working in networking is the best audience to learn this technology. As we discussed earlier that the knowledge of networking is required before learning this protocol. As the networking professionals have the depth knowledge of networking, they will be able to work with this protocol and learn it very efficiently. The students who are keen about learning networks or some aspects of network security can learn the address resolution protocol to get an edge. They will be opening lots of opportunities in terms of jobs, internships and further education by learning things about networking including several protocols.
Conclusion
The address resolution protocol is one of the very important protocols that is used in networking to facilitate proper communication. As we discussed in the previous sections, it is used to resolve the IP address to the MAC address so that the message could be sent to the proper device. One can learn ARP to jump in depth of the networking and to learn how the internet actually works or how the data transmitted over the internet reached the appropriate device. As it works below the network layer, it has a very critical role and this is the only protocol that holds the responsibility of resolving things to get the MAC address so that the correct device could be located. It really makes the internet very efficient and helps users to leverage the internet without worrying much about how it works.
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