To get the Ethernet address of a host from its IP address. Protocols like IP use a different kind of addressing scheme (like IP address)įrom the lower level hardware addressing scheme like MAC address. Knows the Ethernet address (MAC address) of that host. RFC 826 specifies the ARP packet format and other details.Ī host in an Ethernet network can communicate with another host, only if it ARP protocol is implementedīy the network protocol driver. Is used to resolve IP address to the corresponding Ethernet address.ĪRP belongs to the OSI data link layer (Layer 2). Layer protocol address to a data link layer hardware address. Header and the ARP packet (request and reply)?Īddress Resolution Protocol (ARP) is a network protocol, which maps a network Why is the hardware MAC address present in both the Ethernet.Reply packet, as the Ethernet type field is same on both the packets? How to differentiate between a ARP request packet and a ARP.What is the size of an ARP request and reply packet?.When is an entry removed from an ARP cache?.What will happen if a new ARP request packet is received,īut the MAC address to IP address is already present in the ARP cache?.

When is an entry added to the ARP cache?.What will happen if an ARP reply is not received for an ARP.If a host is not able to get the MAC address of a host, how.To which MAC address is an ARP reply packet directed to?.Which MAC address is an ARP request directed to?.Is there a separate packet format for ARP request and ARP.What happens when a host receives an ARP reply packet?.What is the disadvantage if a host updates its ARP cache.Will a host update its ARP cache upon receiving any ARP.What happens when a host receives an ARP request packet?.When is an ARP request packet generated?.How does ARP resolve an IP address to an Ethernet MAC.Can ARP be used in a network other than Ethernet?.Why a IP address needs to be mapped to a MAC address, whyĬan't the MAC address itself is represented using the IP address?.Which RFC specify the requirements for ARP?.

Mikrotik arp list