COMPTIA A+ Practice Exam

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Ace your COMPTIA A+ certification with our practice exam. Engage with a variety of questions including multiple choice and performance-based, complete with hints and detailed explanations. Prepare effectively and boost your confidence for the big day!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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What is the function of ARP?

Way to resolve IP to MAC address
Protocol to convert FQDNs to IPs
Protocol for transferring articles between news servers and news clients
Secure file transfer protocol replacing telnet

The correct answer is: Way to resolve IP to MAC address

The function of ARP (Address Resolution Protocol) is to map an IP address to a physical MAC (Media Access Control) address on a local area network. When a device needs to communicate with another device on the same network, it uses ARP to discover the MAC address associated with a specific IP address. This process allows the device to send data packets directly to the correct hardware address on the network, facilitating proper communication. In contrast, the other options refer to different networking functions. The conversion of Fully Qualified Domain Names (FQDNs) to IP addresses is handled by the Domain Name System (DNS), not ARP. The transfer of articles between news servers and clients is a role attributed to the Network News Transfer Protocol (NNTP). Finally, the secure file transfer protocol that replaces Telnet is typically considered to be SSH (Secure Shell), while File Transfer Protocols (like SFTP) facilitate secure file transfers but do not correlate with ARP's function. Thus, ARP specifically addresses the need for IP-to-MAC address resolution, confirming the accuracy of the correct choice.