The VNC Lab consists of 8 workstations (vnc1.eecs.utk.edu through vnc8.eecs.utk.edu) that are only accessible remotely (see below), i.e. you cannot sit down at the system console.
You may log into the VNC Lab systems via SSH, just like you would for any other EECS Linux system. Please see the SSH knowledge base page for more information.
All VNC Lab systems support access via the RealVNC client software, providing a secure (encrypted) remote desktop connection. This can provide a faster desktop experience than using X11 forwarding with SSH. Please see the RealVNC knowledge base page on how to connect.