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Copyright © 1997 Cisco Systems, Inc.
6-15CSE: Networking Fundamentals — WAN Basics
© 1999, Cisco Systems, Inc.
www.cisco.com
Leased Line
• One connection per physical interface
• Bandwidth: 56 kbps–1.544 Mbps
– T1/E1 and fractional T1/E1
• Cost effective at 4–6 hours daily usage
• Dedicated connections with predictable
throughput
• Permanent
• Cost varies by distance
6-16CSE: Networking Fundamentals — WAN Basics
© 1999, Cisco Systems, Inc.
www.cisco.com
Frame Relay
• Permanent, not dialup
• Multiple connections per
physical interface
(permanent virtual circuits)
• Efficient handling of
bursty (peak performance
period) data
• Guaranteed bandwidth
(typical speeds are
56/64 Kbps, 256 Kbps,
and 1.544 Mbps)—
committed information
rate (CIR)
• Cost varies greatly by region
Permanent Virtual Circuit (PVC)
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