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Component 1
1.3.4
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client
side processing
all information is processed on the
clients
computer
it is
visible
to
users
e.g
java script
benefits of client side processing
reduces
load
on server
reduced amount of web
traffic
improves
security
as it avoids unnecessary
data
transfer
server side processing
used for more
complex
processing where results are required more
quickly
processes are executed on the
web
server
benefits of server side processing
provides further validation
can
perform complex calculations
keeps organisational data secure
as contents do not need to be
downloaded
on users device
processes data faster
search
engine index
indexing is the process of collecting, sorting and storing data in a search engine index
index is continually updated through web crawlers
how
do web crawlers work
index any page or content they find and map links between pages by following all the
internal
and
external
links
records the information and position of each word within the page sorting them into an index
page rank algorithm
first page sorting algorithm, complies and ranks website pages
works by checking number and
quality
of links to a page in order to determine its
importance
HTML defines the structure and
content
of a web page using
tags
enclosed in <>
CSS defines style and appearance using
selectors
such as
classes
can be placed within
HTML
or
externally
in a file
HTML code to implement
hyperlink
from an image
<a
href
= "booking.htm" ><img src = "ticket.png"></
a
>
damping factor
number between
0
and 1 that is the probability a user will not follow a
link
factors that affect the output value given by the PageRank algorithm
number of
links
to target site
PageRank
score
of those sites
damping
factor