"the chain of connections from a device to a switch on your network is as follows:
Device> LC/LC patch cable> Patch Panel> Cross-connect fiber cable> Patch Panel> LC/LC patch cable> Switch
Despite using known working patch cables, the connection isn't working and the device has been tested and was working before being installed. Which of the following if the most likely cause of a problem in this connection"
a) Single Sign-On (SSO)
b) TX/RX reversal
c) Start of Authority (SOA)
d) Misconfigured external firewall gateway