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The address resolution protocol (arp) is a protocol used by theInternet Protocol (IP) , specifically IPv4, to map IP network addresses to the hardware addresses used by a data link protocol. The protocol operates below the network layer as a part of the interface between the OSI network and OSI link layer. It is used when IPv4 is used over Ethernet.
There are four types of arp messages that may be sent by the arp protocol. These are identified by four values in the "operation" field of an arp message. The types of message are:
- ARP request
- ARP reply
- RARP request
- RARP reply
If a host with the IPv4 address 10.10.10.123 and MAC address 00:09:58:D8:11:22 needs to send a packet to another host with the IP address 10.10.10.140, but does not have its MAC address, then the host sends an ARP request to resolve the unknown address.
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What is the purpose of an arp request?
The purpose of an arp request is to map an IP address to a MAC address for the link layer to transmit a packet. For example, ARP will get a request to map 1.2.3.4 to a MAC address 12:fd:23:gf .Then ARP will cache the address mapping that next time an arp request doesnt need to happen
What arp table entries are created when a client makes an arp request that cannot be satisfied by data already in the arp?
Dynamic ARP table entries are created whne a client makes an ARP request that cannot be satisfied by data already in the ARP table.
Are created when a client makes an ARP request that cannot be satisfied by data already in the ARP table?
Dynamic ARP table entries
Which of the following initiates an ARP request?
An ARP request may be initiated anytime a client needs to know the IP address of a machine from its MAC address.
Which of the following allows a router to respond t an ARP request that is intended for a remote host?
proxy ARP
What is gratuitous ARP?
Gratuitous in this case means a request/reply that is not normally needed according to the ARP specification (RFC 826) but could be used in some cases. A gratuitous ARP request is an AddressResolutionProtocol request packet where the source and destination IP are both set to the IP of the machine issuing the packet and the destination MAC is the broadcast address ff:ff:ff:ff:ff:ff. Ordinarily, no reply packet will occur. A gratuitous ARP reply is a reply to which no request has been made.
Why was there no arp request for the ping to eagle server?
stop cheating
When a host on one network wants to communicate with a host on another network what ARP request does it send?
ARP is not used for internetwork communications, it will send ARP to find gateway to be able to communicate with another network.
How is ARP reply message different from that of ARP request message?
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".
What is an ARP request?
ARP is a protocol that maps MAC addresses to IP addresses for packet delivery and for finding out which device in a LAN has a given IP address.
What method of transmission does a workstation use to send out an ARP request?
A broadcast to all the nodes on its segment
What method of transmission does a workstation use to send an ARP request?
A broadcast to all the nodes on its segment
