How can a website distinguish between lack of capacity and a denial-of-service attack? For example, websites often experience a tremendous increase in volume of traffic right after an advertisement with the site's URL is shown on television during the broadcast of a popular sporting event. That spike in usage is the result of normal access that happens to occur at the same time. How can a site
determine that high traffic is reasonable?
What will be an ideal response?
A
key
factor
is
what
the
traffic
does:
do
people
access
the
site,
browse
the
content,
and
perhaps
engage
in
a
transaction,
or
are
the
requests
one-?shot
transmissions:
ping
or
session
setup
messages?
Unfortunately,
a
front-?end
router
cannot
easily
distinguish
session
setup
messages
from
legitimate
users
versus
those
from
attackers,
because
good
and
bad
sessions
both
begin
with
a
setup.
Over
time,
a
site
can
see
an
abnormally
high
number
of
incomplete
sessions
or
other
single
event.
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What will be an ideal response?
What does the following fragment of code display? What do you think the programmer intended the code to do, and how would you fix it?
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Marissa would like to add a picture of each catalog product to each record in the catalog table. Which data type should she use for the ProductDescription field?
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