Chapter 11: Glossary - GE Reason H49 Technical Manual

GE Reason H49
100 Base-FX
10Base-T; 100Base-T and
1000Base-T
Cat. 5, 5e and 6
CIS
CoS
DANP
DANH
Fast Ethernet
FQDN
Half-duplex
HSR
HSR frame
Interlink
LAN
LDAP
MAC address
MIB
H49/EN M/C22

Chapter 11: Glossary

The fiber optic ports are full duplex at 100 Mbps only.
The copper ports are full/half duplex and auto-sense the transmission speed. They will auto-
negotiate with the connected device to determine the optimal speed. When the connected
device is only capable of transmitting at 10 Mbps, the switch makes a 10 Mbps connection.
Category 5, 5e and 6 unshielded twisted pair (UTP) cabling. An Ethernet network operating
at 10 Mbits/second (10Base-T) will often tolerate low quality cables, but at
100 Mbits/second (10Base-T) the cable must be rated as Category 5, or Cat 5 or Cat V, by
the Electronic Industry Association (EIA). This rating is printed on the cable jacket. These
cables contain eight conductors, arranged in four twisted pairs, and terminated with an
RJ45 type connector. In addition, there are restrictions on maximum cable length for both
10 and 100 Mbits/second networks.
Center for Internet Security
The Centre for Internet Security mobilizes a broad community of stakeholders to contribute
their knowledge, experience, and expertise to identify, validate, promote, and sustain the
adoption of cybersecurity's best practices.
Class of Service defined in IEEE 802.1Q -17.2 (2014)
Class of service (CoS), is a 3-bit field called the Priority Code Point (PCP) within an Ethernet
frame header when using VLAN tagged frames as defined by IEEE 802.1Q -17.2 (2014)
Doubly attached node for Parallel Redundancy Protocol (PRP).
Double attached node for High-availability Seamless Redundancy.
An Ethernet system that is designed to operate at 100 Mbps.
A fully Qualified Domain Name (FQDN), sometimes also referred to as an absolute domain
name, is a domain name that specifies its exact location in the tree hierarchy of the Domain
Name System (DNS). It specifies all domain levels, including the top-level domain and the
root zone.
A system that allows packets to be transmitted and received, but not at the same time.
Contrast with full-duplex.
High-availability Seamless Redundancy
HSR provides zero recovery time in case of failure of one component. It is suited for
applications that demand high availability and very short switch over time. Such
applications are protection for electrical substation automation and controllers for
synchronized drives, for instance in printing machines. For such applications, the recovery
time of commonly used protocols like the Rapid Spanning Tree Protocol (RSTP) is not
acceptable.
HSR was standardized by the International Electrotechnical Commission, Geneva, as IEC
62439-3 (2016) Clause 5. It is one of the redundancy protocols selected for substation
automation in the IEC 61850 standard. HSR is application-protocol independent and can be
used by most Industrial Ethernet implementations that use the IEC 61784 suite.
Frame that carries as EtherType the HSR_Ethertype
Link that connects two network hierarchies.
Local area network.
The Lightweight Directory Access Protocol (LDAP) is a directory service protocol that runs
on a layer above the TCP/IP stack. It provides a mechanism used to connect to, search, and
modify Internet directories. The LDAP directory service is based on a client-server model.
The Media Access Control address is a unique 48-bit hardware address assigned to every
network interface card. Usually written in the form 01:23:45:67:89:ab.
See "Management Information Base" in the SNMP section.
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