Cisco 2521LF - 2521LF Router Bedienungsanleitung PDF herunterladen (Seite 8)

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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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