ARP
Arp (address resolution protocol)
Arp (address resolution protocol)
In a Local hosts file.
ARP - Address resolution protocol (ARP) enables the packaging of IP data into ethernet packages. It is the system and messaging protocol that is used to find the ethernet (hardware) address from a specific IP number. Without this protocol, the ethernet package could not be generated from the IP package, because the ethernet address could not be determined RARP - Reverse address resolution protocol (RARP) is used to allow a computer without a local permanent data storage media to determine its IP address from its ethernet address. Fore More information you can visit this website:-http://www.iyogibusiness.com
An IP address is a 4-byte (32-bit) number, used to identify a computer. This is often configured into the computer; or the IP address of a computer is handed to the computer, at startup, by a DHCP server. It is not generally coded into hardware, although certain networking equipment might have, in hardware, a default address such as 192.168.0.1 (this is a private address). For the most part, the IP address is none of the options you specify - it is neither hardware, nor software; it is information used by the hardware and software.
n/y access protocol means say in arp process when an ip has a data and it needs to sent it, it must inform network access protocol such as ethernet and token ring of the destination hardware add on the local n/w.
hosts
Wireshark displays the actual MAC address of the local host because it is directly connected to the network and can access its own hardware address. In contrast, for remote hosts, Wireshark typically shows the MAC address of the last device that forwarded the packet, such as a router, instead of the actual MAC address of the remote host. This is due to the way Ethernet and IP networking function, where MAC addresses are only visible within the same local network segment.
Double Click on the icon named "Local Area Network". Click Properties>TCP/IP Protocol
An ARP request is a broadcast Ethernet packet, that is, a packet sent onto the local physical network that all attached devices will receive. A device sends an ARP request to make the query "what is the MAC address (a.k.a. hardware address, link layer address, etc.) of this IP address (a.k.a Layer 3 address, logical network address, etc.)?" An ARP reply is an unicast Ethernet packet, sent from the device that currently owns the specified IP address, back to the device which sent the ARP request. That is, no other device will receive this packet. The ARP reply answers the requester's question, saying "IP address x.x.x.x is associated with MAC address xx:xx:xx:xx:xx:xx".
It is an IP address (address of a computer, router or some device) in local area network.
When sending information over a local area network, to a specific computer, the MAC address of the destination must be known. ARP - the address resolution protocol - takes care of that. With it, you can ask for the MAC address that corresponds to a specific IP address.