What does VPN stand for?
AnswerVirtual private network
A VPN creates an encrypted tunnel over a public network.
Tech · Facts & stats
Virtual facts & stats
7 fact-checked facts about virtual machines, virtual meetings and virtual worlds, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
What is a virtual machine?
AnswerSoftware that emulates a complete computer
A VM runs an operating system as if it were a separate computer.
Going deeper
What does virtual memory let a computer do?
AnswerUse disk space as an extension of RAM
Virtual memory maps extra memory to storage when RAM runs short.
The fixed-size blocks that virtual memory is divided into are called what?
AnswerPages
Virtual memory is managed in fixed-size pages.
What is a 'virtual tour'?
AnswerAn online walkthrough of a real place
Virtual tours use photos, video or 3D scans to explore places online.
Expert level
Which company pioneered virtual machine systems on mainframes in the 1960s?
AnswerIBM
IBM's CP-40 and CP-67 systems pioneered virtualization in the 1960s.
When a program accesses a page not currently in RAM, what event occurs?
AnswerPage fault
A page fault tells the OS to load the missing page into memory.
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