Refer to the exhibit.
Host A is sending a packet to Host B for the first time. What destination MAC address will Host A
use in the ARP request?
A.
192.168.0.1
B.
172.16.0.50
C.
00-17-94-61-18-b0
D.
00-19-d3-2d-c3-b2
E.
ff-ff-ff-ff-ff-ff
F.
255.255.255.255
Explanation:
rhttp://www.technicalhowto.com/protocols/arp/arp.html
For the initial communication, Host A will send a broadcast ARP (all F’s) to determine the correct
address to use to reach the destination.
ARP sends an Ethernet frame called an ARP request to every host on the shared link-layer
legmen. The Ethernet header includes the source host MAC address and a destination address of
all Fs representing a broadcast frame. The ARP request contains the sender’s MAC and IP
address and the target (destination) IP address. The target’s MAC address is set to all 0s.
ARP Request
C:\Documents and Settings\usernwz1\Desktop\1.PNG
It would be C.
It would not send an ARP request/broadcast, since the IP address of the destination is on a different segment. It would send the packet to the router, assuming Host A has talked with its router before, then it would not have to do an ARP broadcast.
I just tested this in wireshark and ran a ping to another subnet.
For the initial communication, Host A will send a broadcast ARP (all F’s) to determine the correct
address to use to reach the destination.
ARP sends an Ethernet frame called an ARP request to every host on the shared link-layer
legmen. The Ethernet header includes the source host MAC address and a destination address of
all Fs representing a broadcast frame. The ARP request contains the sender’s MAC and IP
address and the target (destination) IP address. The target’s MAC address is set to all 0s.
ARP Request