First line of defence -
preventing
unauthorised people
from entering
buildings where
network equipment is
locked up
Keep access doors
locked using keypads,
fingerprint pads etc
Biometric security
recognition can be
used on mobile
devices to
authenticate users
Use swipe cards
containing user's
details to enter the
building
Install closed circuit
television to
monitor interior and
exterior of building
Install burglar
alarms in all
rooms
Fit radio frequency
identification (RFID) chips
to all equipment so an
alarm will sound if the
equipment is taken out
of the building
Use chains and
locks so
equipment can't
be stolen
Firewalls
Firewalls protect
a network
connected to a
WAN such as the
internet
They can be
provided by
hardware or
software
They can be configured
to prevent
communications from
entering the network
They can prevent
programs and users
from accessing the
internet from within
the network
Individual computers
usually have a software
firewall which have default
rules installed onto them
to protect the computer
from common threats
A business with a LAN
and a internet
connection is likely to
have a hardware
based firewall
because they have
more flexibility in the
rules that can be
applied and data
throughput is faster