What are the advantages of using Software Update?
You can better administer updates to clients and prevent high bandwidth usage from your clients all reaching out to the Apple update servers, keeping the traffic within your network.
What are three logs available to monitor the service?
Service, Error, and Access.
How can you configure a client to use the update service?
Using the defaults command to modify the update plist or a configuration profile.
What is the default port used?
What level of management can Software Update be applied to in Profile Manager?
Devices and device groups.