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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.
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 does the term reply IP address mean?
Each IP packet has information about the destination, and the origin. "Reply IP address" probably refers to the origin; it is to the origin that any reply will have to be sent.
What does ping mean on runescape?
ping stands for packet internet groper. it is use for echo request and reply message to check the physical and logical connectivity of a machine on an internetwork
What steps are taken when forwadin an icmp packet?
For each router, the following steps occur: 1) The "access-group in" command is checked on the interface, and discards the packet if the rule tells it to do so. 2) The "TTL" field is decreased by 1. 3) If TTL is now 0, the router discards the packet and sends a reply packet back to the sender. 4) The packet's IP address is compared to the routing table to determine the next hop of the packet. 5) The router advises if the network or host is unreachable due to a down interface or no known route. 6) The router sends the packet to the outgoing interface's queue to be sent to the next hop. 7) The "access-group out" command is checked on the interface, and discards the packet if the rule tells it to do so. 8) The router sends the packet to the next hop.
What is the function of ping yahoocom?
PING stands for "Packet Internet Groper" it is used to check the connectivity in the network. Ping is a utility that is used to determine if a particular IP address is present on line and accessible. It works by sending a packet to the IP address in question and waiting for a reply.
What is the future tense of reply?
The future tense of reply is will reply.Alsopresent continuous with a time phrase:I am replying to his request tomorrow.be + going to + verb:I am going to reply to his request tomorrow.
What is the next step the host wil take to find the destination MAC address of another host?
This is achieved via the ARP protocol (the Address Resolution Protocol). The host sends out a request, basically asking "who has IP address so-and-so". The request, of course, is sent as a broadcast. If a computer has the specified IP address, it will reply with its MAC address.
Can you know ip corresponding to a given URL?
The easiest way is to use the ping function, which is part of Windows and all varieties of Unix. To use ping with Window, you need to open a command window - click start, select Run and enter cmd followed by enter. A command window should open, you can now type: ping <url> Ping sends an echo request packet and displays the response, which will come back as an ip address, for example: C:\Users\Andrew>ping bbc.co.uk Pinging bbc.co.uk [212.58.224.131] with 32 bytes of data: Reply from 212.58.224.131: bytes=32 time=16ms TTL=121 Reply from 212.58.224.131: bytes=32 time=18ms TTL=121 Reply from 212.58.224.131: bytes=32 time=16ms TTL=121
What is the purpose of the command pin 127.0.0.1?
I think you mean "ping" not "pin". The ping command is a network request for another machine to answer to show it is reachable. 127.0.0.1 is an IP address. It happens to be a very special one, it is reserved to mean "localhost" or "me". So when you type "ping 127.0.0.1" you are asking your own machine to answer itself. While another machine may fail to answer, you can always expect a reply to 127.0.0.1
What command do you use to check if the device at 172.30.4.0 is on working?
Use a ping test. If you ping the address, it should reply - indicating that the device is powered up and working.
What layer is ping of the osi model?
PACKET INTERNET GROPER uses ICMP echo request and reply messages to check the physical and logical connectivity of machines on an internetwork . Hence Ping works on layer 3 of OSI model.
