GMDSS Maintainer: Element 9

1. A A standard IP satellite channel that is “busy” with many active users.
2. B Selection of an upstream IP data service for downstream high-speed data transmission.
3. C Use of the FTP, POP, SMTP or HTTP protocol instead of TCP/IP.
4. D Use of highly contended connections instead of store-and-forward IP circuits.

Tip: press A-D to answer