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Chapter 2:  WANS
2.1 WAN Technology
2.1.1 WAN services
Cisco Connection Online
Cisco Documentation
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WAN Introduction
2.1.2 WAN CPE, demarc, "last mile", CO switch, and toll network
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2.1.3 WAN virtual circuits
Cisco Connection Online
Cisco Documentation
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2.1.4 WAN line types
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2.2 WAN Devices
2.2.1 Fundamental WAN devices
WAN Introduction
2.2.2 Routers and WAN switches
2.2.3 Describe modems on a WAN
2.2.4 CSU/DSUs on a WAN
2.2.5 ISDN Terminal adapters on a WAN
2.3 How WANs relate to the OSI Model
2.3.1 Organizations that deal with WAN standards
2.3.2 WAN physical layer standards
HSSI
2.3.3 Name, and briefly describe, six WAN data link encapsulations
2.4 WAN Encapsulation Formats
2.4.1 Serial line frame fields
2.4.2 PPP
PPP
2.4.3 HDLC
SDLC
2.5 WAN Link Options
2.5.1 Two basic WAN link options
2.5.2 Dedicated lines
2.5.3 Leased lines
2.5.4 Packet-switched connections
2.5.5 Frame relay
2.5.6 Circuit-switched connections
Routing in Circuit-Switched Networks
2.5.7 DDR
2.5.8 Describe ISDN
2.6 Summary
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