Firewall
Firewalls are used to prevent outside attempts
to access IP addresses on a private network.
In other words, they are used to protect
internal data. When configured correctly, they
can also be used to set up rules or lists that
prevent specific URLs from being requested,
e.g., when they are in violation of company
policy. A firewall's main task is to use the
information in a packet (the source and des-
tination IP addresses, as well as the port) to
decide whether the packet should be rejected
or allowed to pass. This also prevents packets
not meant for the network from subjecting the
network to an unnecessary load, as well as
packets meant for the private network from
reaching the Internet.
FTP
File Transfer Protocol
G
Gateway
Gateway When two computers on different
networks want to communicate with each
other, the networks need to be connected
with a router. For example, surfing on the Inter-
net requires for packets to be routed from the
Internet to the network and vice versa. By
using a subnet mask, a computer can know
whether the receiver can be found on its net-
work or whether it is located outside of it. If it
is located outside the network, the computer
will send a packet to the router specified with
the gateway IP address.
H
Human-machine interface
Human Machine Interface
I
IL
Installation instructions
IP Address
IP addresses are 32 bits (4 bytes) long and are
used to uniquely identify networks, sub-
networks, and individual computers that work
with the TCP/IP protocol. A distinction is
drawn between private address spaces for
local networks (intranet) and public addresses
(Internet).
L
LAN
Local Area Network
LD
Ladder diagram - programming method
Lean Automation
Eaton uses this concept "" to provide users in
the machine building and plant engineering
industries with unparalleled freedom so that
they can design creative and profitable solu-
tions.
Lean Solution
Lean automation strategy in which the I/O
level is integrated directly into switchgear.
LSB
Last Significant Bit
M
MDI
Multi Document Interface
Menu bar
Menu ribbon that can be expanded and col-
lapsed and that provides the various available
commands
easyE402/24 MN050009ENEaton.com
871
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