metrotek Bercut-MMT, Operation Manual

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78 Glossary
HTTP:
Hypertext Transfer Protocol . A protocol used for HTML documents
transmission from Web server to Web browser.
ICMP:
Internet Control Message Protocol . A network protocol, a part
of TCP/IP protocol stack. Is mainly used to transmit error no-
tifications and in other exceptional cases that appear during data
transmission.
IEEE 802.1Q:
A standard that defines changes in Ethernet frame structure, that
allow for VLAN information transmission over network.
IP: Internet Protocol. One of the main protocols of TCP/IP family,
provides for non-guaranteed packet delivery without establishing a
connection with recipient.
IP address:
Internet Protocol address. A unique identification (address) of a
device connected to unified network based on the TCP/IP protocols
family. Is represented in the form of 32 bits number.
IP datagram:
The main unit of information transmission in the unified network
based on TCP/IP protocol. Each datagram has source and destina-
tion addresses and data.
IP network:
In this manual, IP network is treated as network that includes devices
working at link and network levels, such as network switch, router.
LoT: Latency over Time. Delay distribution in time.
MAC address:
Media Access Control address. A unique identification that is used
to address network devices at physical level. Ethernet network uses
48-bit MAC address.
MDI: Medium Dependent Interface . A port of an Ethernet device that
enables network hubs and switches to connect to other hubs without
using crossover cable.
MDI-X:
Medium Dependent Interface with Crossover . RJ-45 Ethernet in-
terface used by network switches and hubs.
MPLS:
Multi-Protocol Label Switching . A technology that is used in high
capacity switching devices to transfer IP datagrams. MPLS protocol
is based on IP switching and label switching technology.
NUT: Network Under Test .
OSI: Open Systems Interconnection reference model . Hierarchical model
Bercut-MMT: Ethernet Networks Analysis