How Encryption for Strong
● When you exchange
digital data through
the network, convert
data so that others
do not steal a glance
and it is falsified
according to set
Virtual Private Network(VPN)
Public circuit..completely..lease line..as if..use..service.It
is used for the connection of the network in the enterprise
between bases etc. , and the cost is suppressed to the
introduction of the lease line.
What is WAN ?
● Abbreviation of
"Wide Area Network".
● The line and the lease
line are used.
● The computer is
● I control a particular computer network and
communication with the outside, and the fire
wall (a fire wall) is hardware equipped with
software aimed at maintaining the security of
the internal computer network or the software.
I compare the cracking act that is going to
invade from the outside an internal computer
network to a fire and use expression called the
fire wall as a thing checking it.