A NetFlow analyzer is specifically designed for capturing and analyzing network traffic, providing visibility into the flow of data through a network, which assists in capacity planning, identifying bottlenecks, and network usage patterns. Comparatively, a protocol analyzer captures and analyzes the specific packets traversing the network, which is more focused on examining the content and header information of packets for troubleshooting. A TFTP server is used for simple file transfers, often for network device configuration files. A terminal emulator enables a user to access a network device's command-line interface remotely, rather than analyzing network traffic.