Trained
staff to create and maintain the website - A
good e-commerce site will constantly be updated with new products, new prices
and new features. For the updates to happen they will require technical experts
and design skills.Electronical
catalogue/database of stock - The
database of stock with a user interface that provides the user with information
about products and prices.Using
the search facility the customer can go straight to the product they are
interested in or they can just browse. Methods
of secure payment/shopping trolley - Customers
must be able to add goods to their trolley and then go to the on-line and then
go to the on-line checkout to pay for them. Credit and debit card details need
to be kept secure when transmitted over the internet and encryption is used to
ensure that hackers cannot access this information.
Slide 2
How does a search engine work?
�Before
a search engine can find information, it needs to store information about all
the webpages stored on the internet. There are millions of webpages stored, so
this is not an easy task but it is not done manually. Instead, a web browser
called a web crawler automatically follows all the links it can find and then
each webpage it comes across is analysed for content to see how it should be
indexed. This index is stored in a database. The data the web crawler finds
about each webpage is added to this index.�When
a search engine is used to perform a search using a number of key words, the
search engine examines the index for these words and produces a list of the
webpages which have the best match.�Usually
as well as the title of the webpage some brief details about the content of the
webpage some brief details about the content of the webpage are given. Many
search engines rank the pages by relevance to the search conditions with those
with the greatest relevance being ranked first.
Slide 3
Distributed Computing
Distributed computing is a field of computer science that studies distributed systems. A distributed system is a software system in which components located on networked computers communicate and coordinate their actions by passing messages. The components interact with each other in order to achieve a common goal
