Unleash the potential of networking with our AQA Computer Science GCSE Summary Mind Map! This A3-sized visual guide provides a concise yet thorough overview of vital concepts, encompassing protocols, LANs, WANs, and beyond. Tailored for revision and exam readiness, this resource simplifies intricat...
COMPUTER NETWORKS
BUS TOPOLOGY
files
i
i
BENEFITS
sharing
-
easier
-
is
-
PRO) -
network is unaffected it device fails
share the same hardware
software
STAR TOPOLOGY aren't
dependent on central switch
-install and
update on all
-PRO)
NETWORKS if device fails rest of the network is unaffected
relatively cheap
-
the
-
a ,
ar once
computers
-
LAN -
Local Area Network -simple to add more devices -
CONS -
data collisions are more common AUTHENTICATION
and
communicate
cheaply easily from
geographical
~ area
-small network slow unauthorised data
is
prevents people accessing
-
can be wired or wireless
few dara collisions -if the main cable breaks -PASSWORDS
the
DRAWBACK) to set
very
expensive up
-
-
schools businesses universities faill BIOMETRIC
eg. body
-
in
-
system unique part
-CONS to cables scans of their
-
, ,
-
expensive due
to
vunerable hacking
·
Area EMAIL CONFORMATION
-
-WAN-Wide Network switch is expensive
~
server
dependent on a
-
↳
CAPTCHA from
connects LANS different
geographical prevents programs automatically
-
whole affected it switch fails
-
in network
~
is
-
difficult to
manage
locations maximum number of connections is determined
by the switch doing something
to
more
expensive ser
-
up
The internet
eg.
-
-
PAN -
Personal Area Network
devices short
range
in
4 connects a
-centered around one user
Bluetooth
eg.
·
WIRED
-
HARDWARE
↳
-
Network Interface Card (NIC) -
allows it to connect to devices -
Ethernet -
pairs of copper wires
↳
twisted to reduce internal interference
-Switches -
connect devices on a LAN
Net works
bandwidth
networks cheaper decent
-
Routers -
transmit data between different ,
transmit
Fiberoptic data light copper with
-
Single
as Coaxil wire
-
plastic covering
-
high performance ,
expensive
and metal mesh
suffer interference
don't ↳
shields from outside interference
distances high bandwidth
large ,
very cheap ,
low bandwidth
WIRELESS
family of WLAN
protocols
-
-
uses radio waves
requires a wireless access
point (WAP)
around Less secure
-
BENEFIT) connect DRAWBACK)
automatically
-
move
-
,
limit far
signal
on how a
better for environment
-cheaper ,
can reach
to add users
easy more
PROTOCOL
=
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