Answer:
Please see below
Explanation:
Yes, there indeed is ethical justification for hacking certain computer systems. Since computer scientists are required to keep the system secure from external threats, so they make use of it when testing the network for potential loopholes that could make it vulnerable. It is beneficial in that it can help manifest the weaknesses present in the system, which can then be corrected for.
This is too little points for a question I’m sorry.
Answer:
PBX system.
Explanation:
PBX is an acronym for private branch exchange. It is a private telephone network service that allows users to communicate by making or taking inbound and outbound calls using a gateway, voice mail, transfer calls, call queues and recording.
In an office, employees having a PBX telephone can call other employees in the same office regarding official work.
The callers have to dial a particular extension number so that the intended receiver gets the call.
Example of an extension number is 111-5001 and 111-5002, with a central number as 111-5000.
Hence, the telephone network used in this office is the PBX system.
