Ch4 : Ch4 Fundamentals of WANs
OSI Layer 1 for Point-to-Point WANs : OSI Layer 1 for Point-to-Point WANs Ethernet does not support any type of cabling that allows an individual trunk to run for 1000 miles.
Even if Ethernet supported a 1000-mile trunk, you do not have the rights-of-way needed to bury a cable over the 1000 miles of real estate between buildings
Conceptual View of Point-to-Point Leased Line : Conceptual View of Point-to-Point Leased Line
Slide 4 :
WAN Cabling Standards : WAN Cabling Standards
Clock Rates, Synchronization, DCE, and DTE : Clock Rates, Synchronization, DCE, and DTE
Link Speeds Offered by Telcos : Link Speeds Offered by Telcos
OSI Layer 2 for Point-to-Point WANs : OSI Layer 2 for Point-to-Point WANs HDLC
Point-to-Point Protocol
HDLC : HDLC
Frame Relay and Packet-Switching Services : Frame Relay and Packet-Switching Services Multi-point
Frame Relay and Asynchronous Transfer Mode (ATM)
The Scaling Benefits of Packet Switching : The Scaling Benefits of Packet Switching
Slide 12 :