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25 link-access procedure, balanced protocol (LAPB), and the Frame Relay protocol. com 16 Chapter 1 Cisco Solutions for Remote Access Internet Protocol (SLIP), the High-Level Data Link Control (HDLC) protocol, and Asynchronous Transfer Mode (ATM). Again, the Remote Access exam omits a number of these protocols, both older and newer encapsulations. SLIP has been largely replaced by PPP, and ATM is quite common, but both are outside the scope of the exam. The omission of HDLC is significant if only because this protocol is the foundation for many other transports.
34. D. Payload compression does not compress the header of a packet, only the data field. See Chapter 9 for more information on compression. 35. E. Link compression compresses the header and data fields of a packet. See Chapter 9 for more information on compression. 36. C. Weighted fair queuing (WFQ) is the default for serial links on Cisco routers. See Chapter 9 for more information on queuing. 37. A. The command is queue-list [#] interface [interface] [queue number]. See Chapter 9 for more information on queuing.
As such, frames in Frame Relay are Layer 2 elements. In many companies, setting up Frame Relay services between central locations and remote offices is very popular. The primary benefit of Frame Relay is that it is traditionally tariffed to be distance-insensitive—this means that a connection that crosses the United States will be comparable in cost to that of a connection across town. In addition, Frame Relay services are available internationally from many providers. Frame Relay, in addition to DSL, is becoming more accepted in the telecommuter workspace.