+ 0 Votes MPLS just means a nice fast reliable connection robo_dev 2 years ago MPLS stands for Multi-Protocol Label Switching. It is a network connection type that carefully controls connection paths between locations by labeling each packet...it treats each packet special. "This gives the MPLS network the ability to handle packets with particular characteristics (such as coming from particular ports or carrying traffic of particular application types) in a consistent fashion. Packets carrying real-time traffic, such as voice or video, can easily be mapped to low-latency routes across the network ??? something that???s challenging with conventional routing. The key architectural point with all this is that the labels provide a way to ???attach??? additional information to each packet ??? information above and beyond what the routers previously had."http://www.networkworld.com/research/2007/040207-mpls-migration-explained.htmlA VPN is an encrypted tunnel, and when used with MPLS, means an encrypted tunnel is created between two locations so that the customer data is secure.LV1 vs LV2 sound like marketing terms, not network terms. Do you mean 'service level 1' or level 1? (two very different things)But here is my guess: Two popular ways of selling MPLS are by offering a defined QOS to the customer (level 1) or a cheaper 'best effort' connection (level 2) class of service. QOS (Quality of service) means that certain traffic (such as voice and video) are guaranteed certain bandwidth, where a best effort network means that traffic that can tolerate a bit of delay is sent that way. If a customer is running Voice over IP, for example, they need a the more expensive MPLS service that delivers a defined QOS for the voice packets in order for the phone to work properly.