The OS X Mavericks installer can be downloaded from the Mac App Store for free.

The Archive option in the Finder creates compressed zip archive files. An interface is any channel through which network data can flow. Hardware network interfaces are defined by physical network connections, and virtual network interfaces are logical network connections that ride on top of hardware network connections.

A protocol is a set of rules used to describe a specific type of network communication. Protocols are necessary for separate network devices to communicate properly. Finally, a network service (as it pertains to Network preferences) is the collection of settings that define a network connection.

A network location is a saved state of Network preferences that contains all network interface settings. Only administrators can define network locations, but if more than one location exists, all users can switch between the various network locations via the Apple menu.