1*cf78ab8cSAndroid Build Coastguard Worker# Introduction 2*cf78ab8cSAndroid Build Coastguard Worker 3*cf78ab8cSAndroid Build Coastguard WorkerThe **netsim** network simulator allows developers to run, visualize, test, 4*cf78ab8cSAndroid Build Coastguard Workerdebug, and analyze multi-device and multi-radio radio scenarios across virtual 5*cf78ab8cSAndroid Build Coastguard Workerdevices and accessories. 6*cf78ab8cSAndroid Build Coastguard Worker 7*cf78ab8cSAndroid Build Coastguard Worker## Device Types 8*cf78ab8cSAndroid Build Coastguard Worker 9*cf78ab8cSAndroid Build Coastguard Worker| Device Type | Description | 10*cf78ab8cSAndroid Build Coastguard Worker|:-------------------------------------------------------------|:------------------------------------------| 11*cf78ab8cSAndroid Build Coastguard Worker| [Android Virtual Device](https://developer.android.com/studio/run/emulator) (AVD) | An Android image running in the Android Emulator | 12*cf78ab8cSAndroid Build Coastguard Worker| [Cuttlefish Virtual Device](https://source.android.com/docs/setup/create/cuttlefish) (CVD) | An Android image running in the cuttlefish emulator | 13*cf78ab8cSAndroid Build Coastguard Worker| nimble device with HCI connector | host OS C++ apps using Nimbile bluetooth stack | 14*cf78ab8cSAndroid Build Coastguard Worker| [Bumble](https://github.com/google/bumble) device | host OS python apps using Bumble bluetooth stack | 15*cf78ab8cSAndroid Build Coastguard Worker| [Bumble](https://github.com/google/bumble) Web App | Browser hosted python apps using Bumble bluetooth stack | 16*cf78ab8cSAndroid Build Coastguard Worker| Builtin devices | Bluetooth low-energy beacons and UWB anchors built into netsim | 17*cf78ab8cSAndroid Build Coastguard Worker 18*cf78ab8cSAndroid Build Coastguard WorkerSee [Bumble apps and tools](https://github.com/google/bumble/blob/main/docs/mkdocs/src/apps_and_tools/index.md). 19*cf78ab8cSAndroid Build Coastguard Worker 20*cf78ab8cSAndroid Build Coastguard Worker 21*cf78ab8cSAndroid Build Coastguard Worker 22*cf78ab8cSAndroid Build Coastguard Worker 23