CompTIA Network+ Practice Test

What is the function of the Internet Protocol (IP)?

1. Managing usernames and passwords

2. Forwarding packets across the Internet

3. Providing network security

4. Establishing network connections

The correct answer is: Forwarding packets across the Internet

The function of the Internet Protocol (IP) is primarily to forward packets across the Internet. IP serves as a fundamental layer within the Internet protocol suite, acting as a communication protocol that facilitates the routing of data packets from a source to a destination across diverse networks. Each device connected to the Internet is assigned a unique IP address, which enables these devices to send and receive data effectively. IP is responsible for addressing and packaging data into packets, determining the best path for these packets to travel, and ensuring they reach their correct destination, where higher-level protocols can further manage the data. While managing usernames and passwords relates more to authentication and security protocols, it is not a function of IP itself. Similarly, providing network security typically involves protocols like IPsec and other security measures that operate above or alongside IP rather than being a direct function of it. Establishing network connections is also the task of protocols such as TCP (Transmission Control Protocol), which works in conjunction with IP to ensure reliable data transfer but is not the core function of the Internet Protocol itself.