Host A wants to send a packet to Host C, but it doesn’t know Host C’s MAC addres
ID: 3596966 • Letter: H
Question
Host A wants to send a packet to Host C, but it doesn’t know Host C’s MAC address. Host A sends a packet to start the ARP process. When Host C receives the packet sent by Host A, what packet does it then send? Please explain
A. ARP request (who-has 131.204.128.8) unicast to Host A
B.ARP request (who-has 131.204.128.8) broadcast to LAN
C.ARP reply ( 131.204.128.2 is 00:10:41:16:fe:24) unicast to Host A
D.ARP reply ( 131.204.128.2 is 00:10:41:16:fe:24) broadcast to LAN
Host A 131.204.128.8 Host D Host B 131.204.128.18 Host C 131.204.128.2131.204.128.12 00:50:12:fb:76:c9 00:10:82:3d:7f.a2 00:10:41:16:fe:24 00:10:6f:72:b8:5eExplanation / Answer
Answer:
ARP reply ( 131.204.128.2 is 00:10:41:16:fe:24) unicast to Host A
The following steps are carried out when a ARP request packet is received by a host:
The accompanying advances are done when an ARP ask for parcel is gotten by a host:
On the off chance that the IP deliver to be settled is for this host, at that point the ARP module sends an ARP answer bundle with its Ethernet MAC address.
On the off chance that the IP deliver to be settled is for this host, at that point the ARP module refreshes its ARP store with the source Ethernet MAC deliver to source IP address mapping present in the ARP ask for bundle. In the event that the passage is as of now introduce in the store, it is overwritten. On the off chance that it is absent, it is included.
In the event that the IP deliver to be settled isn't for this host, at that point the ARP module disposes of the ARP ask for parcel.
Clear Explanation with case:
At the point when Computer A tries to speak with Computer C, the accompanying advances settle Router 1's product doled out deliver to its equipment allocated media get to control address: Based on the substance of the directing table on Computer An, IP verifies that the sending IP deliver to be utilized to achieve Computer C is through Router 1, the IP address of its default passage. Host A then checks its own nearby ARP store for a coordinating equipment address for Router 1.
In the event that Computer A finds no mapping in the store, it communicates an ARP ask for edge to all hosts on the nearby system with the inquiry "What is the equipment address for Router 1?" Both equipment and programming addresses for the source, Host An, are incorporated into the ARP ask.
Each host on the neighborhood organize gets the ARP ask for and checks for a match to its own IP address. In the event that a host does not discover a match, it disposes of the ARP ask.
Switch 1 confirms that the IP address in the ARP ask for matches its own particular IP address and includes an equipment/programming address mapping for Host A to its nearby ARP store.
Switch 1 at that point sends an ARP answer message containing its equipment deliver specifically back to Host A.
At the point when Host A gets the ARP answer message from the switch, it refreshes its ARP reserve with an equipment/programming address mapping for Router 1.
Once the media get to control address for Router interface 1 has been resolved, Host A can send IP activity to Router 1 by tending to it to the Router interface 1 media get to control address. The switch then advances the activity to Host C through a similar ARP process.
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