DRAG DROP
Match the LAN type on the left to the correct MEF service type on the right.
Answer: 
Explanation:
Point-Point — E-Line
Multipoint –to-Multipoint – E-Lan
Rooted multipoint — E-Tree
Point-Point — E-Line
Multipointo-Multipoint ?E-Lan
Rooted multipoint — E-Tree
Business subscribers are an important segment of many service providers’ customer base. The
main business services that must be provided by the network today are:
• MPLS VPN• Carrier Ethernet connectivity
• Managed services
Carrier Ethernet connectivity services have been defined by the Metro Ethernet Forum (MEF) to
include ELine, E-LAN, and E-Tree service types, which are defined as follows:
• E-Line is based on a point-to-point Ethernet Virtual Connection. Two E-Line services are defined:
– Ethernet Private Line (EPL): A very simple and basic point-to-point service characterized by low
frame delay, frame delay variation, and frame loss ratio. No service multiplexing is allowed, and
other than a committed information rate (CIR) no class of service (CoS) (Bandwidth Profiling) is
allowed.
– Ethernet Virtual Private Line (EVPL): A point-to-point service wherein service multiplexing (more
than one Ethernet Virtual Connection) is allowed. The individual Ethernet Virtual Circuits can be
defined with a rich set of Bandwidth Profiles and Layer 2 Control Protocol Processing methods as
defined by the Metro Ethernet Forum.
• E-LAN is based on a multipoint-to-multipoint Ethernet Virtual Connection. Service multiplexing
(more than one Ethernet Virtual Circuit at the same UNI) is permitted, as is the rich set of
performance assurances defined by the MEF such as CIR with an associated Committed Burst
Size (CBS) and Excess Information Rate (EIR).
• E-Tree is a point-to-multipoint ELAN service in which the spoke “leaves” can communicate with
the hub or “root” location but not with each other. Typical application for E-Tree is in franchise
operations.