Watch Teracom Training Tutorial " How packets get "Lost". Packet networks can be prone to packet loss. Packet loss can attributed to many reasons such as contention and collisions on a LAN, physical link errors, and congestion at routers and switches due to high traffic volumes, traffic policing and enforcement on WAN services. Perhaps the most common mechanism for packets disappearing is due to buffer overwriting on routers. This is just one of many great tutorials available on the Teracom Training website. Take a look and see what type of telecommunications certification could be right for you!