Which protocols are displayed in the protocol monitor?

The protocol monitor displays lower-layer protocols that are fundamental to networking and data communication. In this case, the correct option includes IPv4, ARP, TCP, and UDP.

IPv4 (Internet Protocol version 4) is essential for addressing and routing packets of data across the internet, while ARP (Address Resolution Protocol) resolves IP addresses into MAC addresses, facilitating local network communication. TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are both transport layer protocols that govern how data is transmitted. TCP provides reliable, ordered, and error-checked delivery of a stream of data, whereas UDP offers a simpler, connectionless service for applications that do not need the reliability of TCP.

In contrast, the other options consist of application layer and session layer protocols, which are not part of the monitoring capabilities focused on lower-layer traffic patterns. For example, HTTP, FTP, SMTP, and HTTPS are crucial for data transfer but operate on the application layer, which is not the focus of the protocol monitor. Hence, the features provided by the protocol monitor align with the layer of protocols present in option B.