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A host wants to send a message to another host that has an IP address of 115.99.80.157, but it does not know the destination device's hardware address. Which protocol can be used to discover the MAC address? IGMP ARP ICMP DNS

A host wants to send a message to another host that has an IP address of 115.99.80.157, but it does not know the destination device's hardware address. Which protocol can be used to discover the MAC address? IGMP ARP ICMP DNS

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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### Networking Protocols and Address Resolution **Question:** A host wants to send a message to another host that has an IP address of 115.99.80.157, but it does not know the destination device's hardware address. Which protocol can be used to discover the MAC address? **Options:** - O IGMP - O ARP - O ICMP - O DNS ### Explanation: When a device in a network needs to communicate with another device but only has its IP address and not its hardware (MAC) address, it uses the Address Resolution Protocol (ARP). ARP is responsible for mapping an IP address to a machine address that uniquely identifies each device on a local network. #### Detailed Explanation of Each Option: - **IGMP (Internet Group Management Protocol):** - Used for managing membership in multicast groups. - Not used for mapping IP addresses to MAC addresses. - **ARP (Address Resolution Protocol):** - Used specifically to map IP addresses to MAC addresses. - The correct protocol for discovering the hardware address when only the IP address is known. - **ICMP (Internet Control Message Protocol):** - Used for diagnostic and error-reporting purposes. - Commonly used by tools like ping but not for address resolution. - **DNS (Domain Name System):** - Used to translate domain names to IP addresses. - Not used for mapping IP addresses to MAC addresses. **Correct Answer:** - O ARP
Transcribed Image Text:### Networking Protocols and Address Resolution **Question:** A host wants to send a message to another host that has an IP address of 115.99.80.157, but it does not know the destination device's hardware address. Which protocol can be used to discover the MAC address? **Options:** - O IGMP - O ARP - O ICMP - O DNS ### Explanation: When a device in a network needs to communicate with another device but only has its IP address and not its hardware (MAC) address, it uses the Address Resolution Protocol (ARP). ARP is responsible for mapping an IP address to a machine address that uniquely identifies each device on a local network. #### Detailed Explanation of Each Option: - **IGMP (Internet Group Management Protocol):** - Used for managing membership in multicast groups. - Not used for mapping IP addresses to MAC addresses. - **ARP (Address Resolution Protocol):** - Used specifically to map IP addresses to MAC addresses. - The correct protocol for discovering the hardware address when only the IP address is known. - **ICMP (Internet Control Message Protocol):** - Used for diagnostic and error-reporting purposes. - Commonly used by tools like ping but not for address resolution. - **DNS (Domain Name System):** - Used to translate domain names to IP addresses. - Not used for mapping IP addresses to MAC addresses. **Correct Answer:** - O ARP
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