Solution

The correct answer is Host-to-Host, Process-to-process.

Key Points

• IP (Internet Protocol) is responsible for host-to-host communication. This means that IP handles the addressing and routing of packets from one host to another across different networks.
• TCP (Transmission Control Protocol) is responsible for process-to-process communication. This means that TCP ensures reliable delivery of data between processes running on different hosts.

Additional Information

• Node-to-node communication refers to the transfer of data between adjacent nodes in a network. This is typically managed by protocols operating at the Data Link Layer, such as Ethernet.
• Socket-to-socket communication is a more specific form of process-to-process communication, where sockets are endpoints for sending and receiving data at the transport layer.