What are the methods to join a node to an Isilon cluster?

A user has recently left the company. After two weeks, the Isilon administrator receive a request to provide some files from the user's directory called \ifs\user\John_Doe\development. The administrator then discovers that the required files have been deleted, but a snapshot of the directory is available.
After restoring the files from the snapshot, which additional step is necessary to access the files?

Which HTTPS port number should be used to connect to any node in an Isilon cluster?

A company has an existing 8-node F800 Isilon cluster with two Z9100 Dell Ethernet back-end switches running on OneFS 8.2.0. The company is planning to add 72 A200 nodes into the cluster. What is the minimum number of additional switches required to support the configuration?

A systems administrator must ensure that an IP address never becomes unavailable, even if a node goes offline. What needs to be configured on SmartConnect?