Question: Today, computer security comprises mainly "preventive" measures, like firewalls or an exit procedure. A firewall can be defined as a way of filtering network data between a host or a network and another network, such as the Internet, and can be implemented as software running on the machine, hooking into the network stack (or, in the case of most UNIX-based operating systems such as Linux, built into the operating system kernel) to provide real time filtering and blocking. Another implementation is a so-called physical firewall which consists of a separate machine filtering network traffic. Firewalls are common amongst machines that are permanently connected to the Internet.
Is there an answer to this question: What type of machines normall have a firewall?

Answer: permanently connected to the Internet


Question: Hydrogen gas was first artificially produced in the early 16th century, via the mixing of metals with acids. In 1766–81, Henry Cavendish was the first to recognize that hydrogen gas was a discrete substance, and that it produces water when burned, a property which later gave it its name: in Greek, hydrogen means "water-former".
Is there an answer to this question: When was hydrogen gas artificially produced for the first time?

Answer: early 16th century


Question: Christopher Orr, writing in The Atlantic, also criticised the film, saying that Spectre "backslides on virtually every [aspect]". Lawrence Toppman of The Charlotte Observer called Craig's performance "Bored, James Bored." Alyssa Rosenberg, writing for The Washington Post, stated that the film turned into "a disappointingly conventional Bond film."
Is there an answer to this question: What publication does Alyssa Rosenberg write for?

Answer: The Washington Post


Question: Arsenal's parent company, Arsenal Holdings plc, operates as a non-quoted public limited company, whose ownership is considerably different from that of other football clubs. Only 62,217 shares in Arsenal have been issued, and they are not traded on a public exchange such as the FTSE or AIM; instead, they are traded relatively infrequently on the ICAP Securities and Derivatives Exchange, a specialist market. On 10 March 2016, a single share in Arsenal had a mid price of £15,670, which sets the club's market capitalisation value at approximately £975m. Most football clubs aren't listed on an exchange, which makes direct comparisons of their values difficult. Business magazine Forbes valued Arsenal as a whole at $1.3 billion in 2015. Consultants Brand Finance valued the club's brand and intangible assets at $703m in 2015, and consider Arsenal an AAA global brand. Research by the Henley Business School modelled the club's value at £1.118 billion in 2015, the second highest in the Premier League.
Is there an answer to this question: On March 10,2016 what was the value of a share of Arsenal stock?

Answer:
£15,670