LMI protocol, Invers ARP
Both ATM and Frame Relay are ways to connect your local network router to an ISP
inverse ARP
IP, Ethernet, Frame Relay, ...IP, Ethernet, Frame Relay, ...IP, Ethernet, Frame Relay, ...IP, Ethernet, Frame Relay, ...
LMI
A means of providing access to the Frame Relay network over a DSL connection
Frame Relay is a packet-switching technology. It works by sending information in packets, which are called frames, through a shared frame-relay network.
Serial interfaces do not pass any MAC information because the information is formed using WAN encapsulation (PPP. HDLC, Frame Relay).
Frame Relay is a WAN (Wide Area Network) encapsulation protocol. It is considered a Multi-Access-Non-Broadcast medium. Each router has a DLCI number that will uniquely identify a specific route, however that DLCI is locally significant only. Data from your router will be sent into the Frame-Relay cloud, there the frames are switched (OSI layer 2). The path traveled is only there when it is needed. Your Service Provider might be switching towards MPLS though.
In a Frame Relay network, valid IP addressing typically involves using private IP address ranges (such as those defined by RFC 1918) for internal communication, while public IP addresses can be used for connections to external networks. The IP addresses are often assigned to the routers at each end of the Frame Relay circuit, with proper subnetting to accommodate the number of devices. Additionally, encapsulation protocols like Point-to-Point Protocol (PPP) or Serial Line Internet Protocol (SLIP) may be used to facilitate IP communication over the Frame Relay link. Proper configuration of IP addressing and routing protocols is essential for efficient data transmission across the network.
LMI
Router & Win 2008
No. Frame Relay is not operating at Layer 3. Frame Relay is strictly a Layer 2 protocol suite, whereas X.25 provides services at Layer 3 (the network layer) as well. This enables Frame Relay to offer higher performance and greater transmission efficiency.