NETWORK LAYER
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Finding the IP address from the DNS
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Finding the IP address of the default gateway
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Finding the IP address that corresponds to a MAC address
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Finding the MAC address that corresponds to an IP address
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Detailed explanation-1: -The Address Resolution Protocol (ARP) is a communication protocol used for discovering the link layer address, such as a MAC address, associated with a given internet layer address, typically an IPv4 address. This mapping is a critical function in the Internet protocol suite.
Detailed explanation-2: -ARP is the Address Resolution Protocol, used to translate between Layer 2 MAC addresses and Layer 3 IP addresses. ARP resolves IPs to MAC addresses by asking, “Who has IP address 192.168. 2.140, tell me.” An example of an ARP reply is “192.168. 2.140 is at 00:0c:29:69:19:66.”
Detailed explanation-3: -InARP is an addition to ARP technology that enables a device to request for an IP address corresponding to a given MAC address. InARP is defined in RFC 1293.
Detailed explanation-4: -Address Resolution Protocol (ARP) The Address Resolution Protocol is a layer 2 protocol used to map MAC addresses to IP addresses. All hosts on a network are located by their IP address, but NICs do not have IP addresses, they have MAC addresses. ARP is the protocol used to associate the IP address to a MAC address.