Why are ARP Request packets not transmitted (i.e., not encapsulated) like IP packets? Explain your answer.
What will be an ideal response?
ARP request is needed only when the communication in the physical layer happens using hardware
address in the same network segment. Logically, ARP request is used when IP address of the host being connected is unknown. Therefore, we can not send ARP request using IP packet as a IP datagram. Another reason is even if we develop an algorithm to use IP packet for ARP, it is not efficient at all, because IP header is unnecessary to get ARP reply. In short, ARP encapsulated in ethernet frame is better approach rather than in IP datagram
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Just as a switch keeps records of MAC addresses that it has learned, so does your computer. What protocol does your computer use to learn MAC addresses?
A. ARP B. ICMP C. DHCP D. IP
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Fill in the blank(s) with the appropriate word(s).
Two PCs have been assigned the following IP addresses, subnet mask, and default gateway: PC1 192.168.100.20 255.255.255.240 No DG PC2 192.168.100.10 255.255.255.240 192.168.100.1 Assuming all network devices including the switch the PCs are connected to, network cabling, and the default gateway are all functioning which of the following will occur when PC1 attempts to transfer a file to PC2?
A. PC1 will not be able to communicate with PC2 since PC2 is in a different subnet and PC1 does not have a default gateway configured. B. PC1 will perform an ARP broadcast to resolve PC2s IP address to MAC address since both PCs have the same subnet mask and communication will occur. C. PC1 and PC2 will not be able to communicate since both PCs must have the same default gateway. D. PC1 will send traffic to the default gateway at 192.168.100.1 since PC2 is in a different subnet and communication will occur