Which of the following comes under remote login? Video conferencing Talking on…

Concept

Remote login is the process of logging in to and operating a computer located elsewhere on a network, as if you were seated at it. The defining requirement is interactive access to the remote machine's session — typically a command-line shell — so that commands typed locally execute on the remote host.

Applying it to each item

• Video conferencing — a real-time audio/video communication service. It transports media between people; it gives no shell or command access to a remote host, so it is not remote login.

• Talking on phone — a voice call. It carries speech, not a login session on a computer, so it is not remote login.

• Telnet — an application-layer protocol that opens an interactive terminal session on a remote machine, letting a user log in and run commands there. This is the textbook example of remote login.

• Any PC — just a general-purpose computer. Hardware alone is not a login mechanism; without a protocol such as Telnet or SSH it provides no remote access.

Conclusion

Only item 3, Telnet, provides interactive command-line access to a remote system, so it is the only one that comes under remote login. Hence the answer is “Only 3”.