Exfo ETS-1000 Manuel d'utilisateur Page 103

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Configuring and Starting a Test
Ethernet Tester Analyzer 95
BERT
At the Network layer (Level 3), all data is encapsulated into IP packet,
and then into Ethernet-frame thus allowing to transmit test packets
through a network with both OSI’s second- and third-layer equipment
(for example, network switch, network router).
At the Transport layer (Level 4), test data is encapsulated into an UDP
header, then into IP header and an Ethernet frame thus allowing to
transmit test pattern using transport protocols.
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