Which of the following commands is used to display current network connections in Linux?

The command used to display current network connections in Linux is netstat. This command provides comprehensive information about network connections, routing tables, interface statistics, masquerade connections, and multicast memberships. When executed, it can show both incoming and outgoing network connections along with their associated protocols, statuses, and the IP addresses and ports being used.

The other choices do not fulfill this purpose: "show connection" and "current connections" are not recognized Linux commands and would not yield any output related to network connections. "ipconfig," on the other hand, is a command specific to Windows operating systems for displaying network configuration details. In summary, netstat is the correct choice for managing and visualizing network connections on Linux systems.