Wide area networks (WANS) Chapter 7 Updated January 2007 Panko’s Business Data Networks and Telecommunications. 6th edition Anapnnogggnonnp Copyright 2007 Prentice-Hall May only be used by adopters of the book
Wide Area Networks (WANs) Chapter 7 Updated January 2007 Panko’s Business Data Networks and Telecommunications, 6th edition Copyright 2007 Prentice-Hall May only be used by adopters of the book
Orientation Single Networks Layers 1 and 2(so osI standards dominate) Chapters 4-7: Local to long-distance for single networks Chapter 4: Wired Ethernet LANS Chapter 5: Wireless LANS WLANs) Chapter 6: Telecommunications(and Internet Access Chapter 7: Wide Area Networks (WANs) Chapter 8: TCP/IP Internetworking To link multiple single networks 7-2
7-2 Orientation • Single Networks – Layers 1 and 2 (so OSI standards dominate) – Chapters 4-7: Local to long-distance for single networks • Chapter 4: Wired Ethernet LANs • Chapter 5: Wireless LANs (WLANs) • Chapter 6: Telecommunications (and Internet Access) • Chapter 7: Wide Area Networks (WANs) • Chapter 8: TCP/IP Internetworking – To link multiple single networks
WAN Essentials
WAN Essentials
Figure 7-1: Wide Area Networks WANS) Wide Area Networks(WANs) Single networks that connect different sites So Layer 1 and Layer 2 operation WAN Purposes Internet access( Chapter 6) Link sites within the same corporation Provide remote access to individuals who are off site 7-4
7-4 Figure 7-1: Wide Area Networks (WANs) • Wide Area Networks (WANs) – Single networks that connect different sites – So Layer 1 and Layer 2 operation • WAN Purposes – Internet access (Chapter 6) – Link sites within the same corporation – Provide remote access to individuals who are off site
Figure 7-1: Wide Area Networks WANS) WANs are characterized by high cost and low Speeds High cost per bit transmitted compared to LaNs Consequently, lower speeds(most commonly 128 kbps to a few megabits per second) This speed usually is aggregate throughput shared by many users Much slower than LAN speeds (100 Mbps to 1 Gbps to the desktop 7-5
7-5 Figure 7-1: Wide Area Networks (WANs) • WANs are Characterized by High Cost and Low Speeds – High cost per bit transmitted compared to LANs – Consequently, lower speeds (most commonly 128 kbps to a few megabits per second) • This speed usually is aggregate throughput shared by many users – Much slower than LAN speeds (100 Mbps to 1 Gbps to the desktop)