True or False: Frame headers and packet headers contain addresses.

Frame headers and packet headers indeed contain addresses, which is fundamental to how data is transmitted across networks. Frame headers typically contain the MAC (Media Access Control) addresses, which identify devices on the local area network. This is crucial for ensuring that data is delivered to the correct destination within the network. Packet headers, on the other hand, contain IP (Internet Protocol) addresses, which are necessary for routing the packets between different networks and across the internet. The presence of these addresses allows for proper data packet delivery and facilitates efficient communication between devices in diverse networking environments.

Other options might suggest variability or exceptions, but the statement as posed is fundamentally accurate across standard networking frameworks where address information is a core component of frame and packet headers.