No. That is the numbering you and I count dollars.
No. About the only use of octal is in some UNIX systems for
assigning access permissions.
Correct.
Remember the "ON" and "OFF" state, or a "0" or "1".
No. IBM Mainframes uses Hexadecimal as a code representation.
such as a 10BaseT hub, a Fan-Out Box, or Multi-port repeater for 10Base2
cabling will act as repeaters.