[&] Which of the following Layer-2 technologies was NOT originally designed to support dedicated, always "on" connections? (Select two answers)
- Ethernet
- PPP
- HDLC
- Gigabit Ethernet
- ISDN

[&] Which of the following is a networking device typically associated with the Data Link Layer? (Select two answers)
- Router
- Bridge
- Hub
- Firewall
- Switch

[&] Which of the following Layer-2 technologies supports the implementation of three-or-more hosts on a single network cable? (Select two answers)
- PPP
- Gigabit Ethernet
- HDLC
- Ethernet
- ISDN

[&] Which of the following is the responsibility of a Layer-2 technology? (Select two answers)
- Providing for Link-Layer addressing
- Providing an algorithm for best path determination
- Providing for Network-Layer addressing
- Determining how to share local network access in a fair manner
- Providing a mechanism for reliable data delivery