
Industrial Managed
Ethernet Switch
User Manual
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6
Glossary
Term
Description
802
.
1
A working group of IEEE standards dealing with Local Area Network
.
802
.
1p
Provide mechanism for implementing Quality of Service
)
QoS
(
at the Media Access Control
Level
)
MAC
(.
802
.
1x
IEEE standard for port
-
based Network
-
Access Control
.
It provides an authentication
mechanism to devices wishing to attach to a LAN or WLAN
Broadcast
Broadcast packets to all stations of a local network
.
Client
Device that use services provided by other participants in the network
.
DES
D
ata
E
ncryption
S
tandard is a block cipher that uses shared secret encryption
.
It
’s based on a
symmetric
-
key algorithm that uses a 56
-
bit key
.
DHCP
D
ynamic
H
ost
C
onfiguration
P
rotocol allows a computer to be configured automatically,
eliminating the need for intervention by a network administrator
.
It also prevents two computers
from being configured with the same IP address automatically
.
There are two versions of
DHCP; one for IPv4 and one for IPv6
.
DNS
D
omain
N
ame
S
ystem is a hierarchical naming system built for any computers or resources
connected to the Internet
.
It maps domain names into the numerical identifiers
.
For example,
the domain name www
.
.
com is translatedinto the address 74
.
125
.
153
.
104
.
EAP
E
xtensible
A
uthentication
P
rotocol is an authentication framework widely used by IEEE
.
Ethernet
In star
-
formed physical transport medium, all stations can send data simultaneously
.
Collisions
are detected and corrected through network protocols
.
Gateway
Provide access to other network components on the OSI layer model
.
Packets which are not
going to a local partner are sent to the gateway
.
The gateway takes care of communication
with the remote network
.
IEEE
Institute of Electrical and Electronics Engineers
IGMP
I
nternet
G
roup
M
anagement
P
rotocol is used on IPv4 networks for establishing multicast group
memberships
.
IP
Internet Protocol
IPv4
I
nternet
P
rotocol
v
ersion
4
is the fourth revision of the Internet Protocol
.
Together with IPv6, it
is the core of internet network
.
It uses 32
-
bit addresses, which means there are only 2^32
possible unique addresses
.
Because of this limitation, an IPv4 addresses became scarce
resource
.
This has stimulated the development of IPv6, which is still in its early stage of
development
.
LAN
Local Area Network is the network that connects devices in a limited geographical area such
as company or computer lab
.
MAC
Media Access Control is a sub
-
layer of the Data Link Layer specified in the OSI model
.
It
provides addressing and channel access control mechanisms to allow network nodes to
communicate within a LAN
.
MAC
Address
A unique identifier assigned to network interfaces for communications on a network segment
.
It
is formed according to the rules of numbering name space managed by IEEE
.
MD5
Message
-
Digest algorithm 5 is a widely used cryptographic which has a function with a 128
-
bit
hash value
.
Multicast
This type of transmission sends messages from one host to multiple hosts
.
Only those hosts
that belong to a specific multicast group will receive the multicast
.
Also, networks that support
multicast send only one copy of the information across the network until the delivery path that
reaches group members diverges
.
At these diverges points, multicast packets will be copied
and forwarded
.
This method can manage high volume of traffic with different destinations while
using network bandwidth efficiently
.