An IPv6 address is of how many bits?
- A.32 bits
- B.64 bits
- C.128 bits
- D.256 bits
Correct answer
Explanation
The correct answer is C, 128 bits. IPv6 was framed because the older scheme was running out of addresses, and its 128-bit length yields a pool so large that shortage is no longer a worry. Such an address is written as eight groups of hexadecimal digits separated by colons.
Option A, 32 bits, is the length of an IPv4 address, written as four decimal numbers from 0 to 255 separated by dots, and it is the distractor most often marked by mistake. Option B, 64 bits, is not the size of any IP address; it describes processor and register widths. Option D, 256 bits, is a length met in encryption keys such as AES-256, not in addressing. So remember the pair: IPv4 is 32 bits and IPv6 is 128 bits, four times as long.
Read the full article: Internet and Email: Protocols, Ports and Terms
Practice Questions
View allDeleted emails are stored in
- A.Drafts
- B.Trash
- C.Inbox
- D.Sent mail
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When a letter is deleted from a mailbox it is not wiped out at once. It is moved to a folder called Trash, or Bin in some services, and kept there for a fixed number of days so that a letter deleted by mistake can be restored.
Read the full explanation →In Gmail, the email address of the recipients can be entered in __________ field.
- A.Subject
- B.To
- C.Message
- D.From
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The To field of a mail window is meant for the addresses of the people the letter is written to.
Read the full explanation →ARPANET, the forerunner of the internet, carried its first message in which year?
- A.1959
- B.1969
- C.1979
- D.1989
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ARPANET was funded by the Advanced Research Projects Agency of the United States Department of Defense, and in 1969 it linked computers at four American universities and passed its first message between them.
Read the full explanation →Who is credited with inventing the World Wide Web?
- A.Vinton Cerf
- B.Charles Babbage
- C.Tim Berners-Lee
- D.Ray Tomlinson
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Working at CERN in Switzerland, he proposed a system of linked documents in 1989, wrote the first browser and server, and put the first website online in 1991.
Read the full explanation →Which symbol was chosen by Ray Tomlinson to separate the user name from the host name in an email address?
- A.#
- B.&
- C.@
- D.*
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Ray Tomlinson sent the first message between two computers on ARPANET in 1971 and needed a character that would never appear in a person's name.
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