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# Statistics Dictionary Keys

Keys associated with values in the statistics dictionary.

## Topics

### Constants

[`var kSCNetworkConnectionBytesIn: String`](/documentation/SystemConfiguration/kSCNetworkConnectionBytesIn)

The key associated with the number of bytes going up into the network stack for any networking protocol without the PPP headers and trailers.

[`var kSCNetworkConnectionBytesOut: String`](/documentation/SystemConfiguration/kSCNetworkConnectionBytesOut)

The key associated with the number of bytes coming out of the network stack for any networking protocol without the PPP headers and trailers.

[`var kSCNetworkConnectionPacketsIn: String`](/documentation/SystemConfiguration/kSCNetworkConnectionPacketsIn)

The key associated with the number of packets going up into the network stack for any networking protocol without the PPP headers and trailers.

[`var kSCNetworkConnectionPacketsOut: String`](/documentation/SystemConfiguration/kSCNetworkConnectionPacketsOut)

The key associated with the number of packets coming out of the network stack for any networking protocol without the PPP headers and trailers.

[`var kSCNetworkConnectionErrorsIn: String`](/documentation/SystemConfiguration/kSCNetworkConnectionErrorsIn)

The key associated with the number of errors going up into the network stack for any networking protocol without the PPP headers and trailers.

[`var kSCNetworkConnectionErrorsOut: String`](/documentation/SystemConfiguration/kSCNetworkConnectionErrorsOut)

The key associated with the number of errors coming out of the network stack for any networking protocol without the PPP headers and trailers.


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