Complete the text with the correct active or passive form of the verb in brackets.

Peer-to-peer file sharing (P2P) is a process that allows

files (1) to be downloaded (download) from other

connected computers (called peers). Similarly, your

computer (2) (search) by other computers

on the network by peers looking for files.

File sharing (3) (begin) in 1999 when

Napster (4) (introduce) a file sharing

program and central server that linked people who had

files with those who wanted files. When you

(5)  (search) for a file, the server would find

all of the available copies of that file. Then the files

(6) (transfer) between the two private

computers. Unlike P2P programs today, it was only

possible for people (7) (share) music files.

Napster (8) (prosecute) for copyright

reasons and they (9) (shut down) in July

2001. They (10) (reopen) as a pay service

some time later. After Napster shut down, new ways of

sharing files (11) (develop) that did not

require a central server. The most popular of these are

based on a system called BitTorrent. ​