It may come as no surprise, but every Apple TV shows up as "Apple TV" by default once installed on a home network. This means when using AirPlay or Home Sharing, this name appears next to an Apple TV icon. For those with multiple Apple TV units or anyone who would prefer to customize the name of their device, tvOS provides an option to change its network name. Once the custom name has been configured, the new name will appear next to the Apple TV icon when connecting from an iPhone or Mac.
The Home Sharing feature in iTunes makes it possible to stream an iTunes library directly from a computer to an iPhone, iPad or iPod touch. As long as the iOS device is connected to the same Wi-Fi network as the computer, large iTunes collections can be accessed directly from iOS, without syncing or taking up storage space. It only takes a few steps to set up Home Sharing and start streaming music and video.
First, open iTunes on the computer and navigate to File -> Home Sharing -> Turn on Home Sharing. Older versions of iTunes (10.2 to 10.7) have the Turn on Home Sharing option under the Advanced menu. Enter your Apple ID and password to start sharing the iTunes library. iTunes media on multiple computers can be shared over the same Wi-Fi network.