In particular, Quality of Service (QoS) becomes more important in a WAN environment than in a LAN. In many cases, transitioning from the LAN to the WAN reduces bandwidth by approximately 99%. Because of this severe bandwidth crunch, strong queuing, buffering, and packet loss management techniques have been developed. Severe bandwidth crunch, strong queuing, buffering, and packet loss management techniques are covered in more detail in Quality of Service guidelines.