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 Boot-  sector  virus 

Occupies boot record of hard and 

floppy disks and is activated during computer  start-  up.

Botnet 

Independent computers, connected to the 

Internet, are used together, typically for malicious 

purposes through controlling software. For example, they 

may be used to send out spam or for a  denial-  of-  service 

attack where they repeatedly access a server to degrade its 

service. Computers are often initially infected through a 

virus when effective  anti-  virus measures are not in place.

Bounce rate 

Percentage of visitors entering a site who 

leave immediately after viewing one page only (known as 

‘ single-  page  visits’).

Brand 

The sum of the characteristics of a product or 

service perceived by a user.

Brand equity 

A brand’s assets (or liabilities) linked 

to the brand’s name and symbol that add to (or subtract 

from) a service.