Portability of Data
A2 Level
Data are said to be portable when:
- they can be accessed by several different applications.
- they are in auxilliary storage.
- they are in an auxilliary storage medium that can be carried about easily.
- they care being transferred form one machine to another.
A protocol is
- a computing language
- a computer that translates one computer language to another
- a well written piece of code.
- a set of rules and standards that enable computers to transfer data from one to another.
A de jure standard is one that arises
- from a company that has a particularly large market share.
- from agreements made in the industry.
- from a protocol.
- from the use of a particular programming language.
What is the language used on the Internet?
- C++
- Visual Basic
- HTML
- SQL
A URL (uniform resource locator) is another term used for:
- an address of a web page
- a web browser
- a router
- a gateway
The .co in a web address means that the organisation is MOST likely to be:
- a company trading internationally
- a charity
- an information service.
- a company trading in one country only.
A baseband link is one that:
- carries lots of signals at the same time.
- carries one bit (1 or 0) at a time very rapidly
- carries one bit (1 or 0) at a time but rather slowly.
- uses a very slow (9.6 k) modem.
Which one of these statements about the baud rate is true?
- It is the number of bytes per second while the band rate is the number of bits per second
- It is the number of bits per second while the band rate is the number of bytes per second
- It's the number of bytes per second. The number of bits per second is eight times higher.
- It's the number of bits per second. The number of bytes per second is eight times lower.
Which one of these is correct about Broadband?
- It needs a modem. It can be transmitted through wires or by radio signals.
- It needs no modem. It can be transmitted through wires or by radio signals.
- It needs a modem. It can only be transmitted by radio signals.
- It needs a modem. It can only be transmitted through wires.
Which one of these is true about parallel transmission of data.
- A whole byte of data is sent at the same time. Each bit has its own cable. Parallel transmission has an unlimited distance.
- A whole byte of data is sent at the same time. Each bit has its own cable. Parallel transmission is restricted to about 5 metres.
- Only one bit is sent at a time. Only one wire is needed. Parallel transmission is restricted to about 5 metres.
- Only one bit is sent at a time. Only one wire is needed. Parallel transmission has an unlimited distance.