
Industrial Managed
Ethernet Switch
User Manual
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OSI Model
O
pen
S
ystem
I
nterconnection mode is a way of sub
-
dividing a communication system into
smaller parts called layers
.
A layer is a collection of conceptually similar functions that provide
services to the layer above it and receives services from the layer below it
.
QoS
Quality of Service
RADIUS
R
emote
A
uthentication
D
ial
I
n
U
ser
S
ervice is an authentication and monitoring protocol on the
application level for authentication, integrity protection and accounting for network access
.
Server
Devices that provide services over the network
.
SMTP
S
imple
M
ail
T
ransfer
P
rotocol
)
SMTP
(
is an internet standard for email transmission across IP
network
.
SNMP
S
imple
N
etwork
M
anagement
P
rotocol is a protocol for managing devices on IP networks
.
It
exposes management data in the form of variables on the managed systems, which describe
the system configuration
.