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In the OC-48 signal shown, when is the extinction ratio acceptable?

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Host 1 and Host 2 are on Ethernet LANs in different buildings. A serial line is installed between
two Cisco routers using Cisco HDLC serial line encapsulation. Routers A and B are configured to
route IP traffic. Host 1 sends a packet to Host 2. A line hit on the serial line causes an error in the
packet. When this is detected, the retransmission is sent by:

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Using the shown debugging excerpt, what option best describes the problem?

What type of effect on optical signals occurs when temperature fluctuations and bending stresses
on fiber?

Which are the correct ways to release IBGP from the condition that all IBGP neighbors need to be
fully meshed? (multiple answer)

Routers running OSPF and sharing a common segment become neighbors on that segment. What
statement regarding OSPF neighbors is FALSE?

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In the MPLS network shown, which subnets would be in the same Forwarding Equivalence Class
(FEC) on router PE1

When discussing FCIP compression what should be addressed?

What does NOT contribute to lowered throughput in practical IP over ATM networks?

What is the frequency of an optical signal with a wavelength of 1530 nm?