Across
- 1. ----ISP's are 2nd level of hierarchy of Internet structure
- 3. In year 1983, which protocol became the official protocol for ARPANET?
- 6. one of the key element of a protocol
- 7. Internet is based on whose concept?
- 8. backbone networks are connected & maintained by switching station
- 9. new internet connection provider
Down
- 2. A hardware device to transfer data from one network to another
- 4. set of rules to govern the communication
- 5. ARPANET uses a software for communication between the hosts
- 6. synonym for " agreed-upon rules or guidelines".