In information technology, a 'protocol' is the special set of rules that endpoints in a telecommunication connection use, when they communicate e.g., Internet protocol. 'Login' or logon refers to the credentials required to obtain access to a computer system.
'Archie' is a program that enables required you to search for files anywhere on the internet by filename.

Correct Option: D

In information technology, a 'protocol' is the special set of rules that endpoints in a telecommunication connection use, when they communicate e.g., Internet protocol. 'Login' or logon refers to the credentials required to obtain access to a computer system.
'Archie' is a program that enables required you to search for files anywhere on the internet by filename.

A modem or modulator-demodulator is a device that modulates an analog carrier signal to encode digital information and also demodulates such a carrier signal to decode the transmitted information.

Correct Option: B

modem or modulator-demodulator is a device that modulates an analog carrier signal to encode digital information and also demodulates such a carrier signal to decode the transmitted information.

RS-D1, IRS-1D and INSAT-2D are all satellite RS-D1 is a Rohini satellite, IRS-ID is an Indian Remote Sensing satellite,INSAT-2D is an inian communications sensing satellite, while SLV-3 is a 'Satellite launching vehicle and not a satellite itself.

Correct Option: A

RS-D1, IRS-1D and INSAT-2D are all satellite RS-D1 is a Rohini satellite, IRS-ID is an Indian Remote Sensing satellite,INSAT-2D is an inian communications sensing satellite while SLV-3 is a 'Satellite launching vehicle and not a satellite itself.

Cosmos 2406 is a Russian military satellite that was launched from Baikonur by a Zenit 2 rocket on 10 June 2004.

Correct Option: B

Cosmos 2406 is a Russian military satellite that was launched from Baikonur by a Zenit 2 rocket on 10 June 2004.