"Network and Internet technologies": HTML5 Crossword

Across

1. The shortened version of the device, Modulator / Demodulator. (5)
5. A type of cable which is connected to the network port. (8)
6. What should a network have in order to avoid being targeted by a user with unauthorised access? (8)
9. A HAN needs this device in order to connect the computers in a network. (6)
11. This type of cable transmits data along thin glass tubes. (5)

Down

2. A USB device that acts as a small modem. (6)
3. IP addresses are allocated by this device. (6)
4. A wireless radio frequency for the transmission of data across short distances. (9)
7. These IP addresses change periodically. (7)
8. These IP addresses never change. (6)
10. The type of connection that uses cables to connect. (0,5)