By Default Flexnet Operation will create a connection to RabbitMQ which will be used to manage messaging between FlexNet Operations components.

When we check the nocontext.log or ADMN-notification.log we can see the following message if the connection is created successfully

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2022-11-23 09:52:53,957 [ice thread 1-26] INFO (notification) [] -------------------------------------------

2022-11-23 09:52:53,957 [ice thread 1-26] INFO (notification) [] Creating new connection to RabbitMQ server at: 'AMQP://guest:guest@localhost:5672'

2022-11-23 09:52:54,099 [ice thread 1-26] INFO (notification) [] Successfully connected to RabbitMQ

2022-11-23 09:52:54,099 [ice thread 1-26] INFO (notification) [] -------------------------------------------

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For example, the First connection is created for Transactional connection and the second one is created for Flexnet Operations to manage messaging.

Protocol used: AMQP 0-9-1
AMQP 0-9-1 has a model that includes connections and channels. Channels allow for connection multiplexing (having multiple logical connections on a "physical" or TCP one).

The maximum number of channels that can be open on a connection simultaneously is negotiated by client and server at connection time. The client cannot be configured to allow for more channels than the server configured maximum.

After successfully opening a connection and authenticating, applications open one or more channels and use them to perform protocol operations, e.g. define topology, consume and publish messages.

AMQP 0-9-1 supports different authentication mechanisms. While it's most common for applications to provide a pair of credentials, x509 certificates and PKI can be used instead.