The information displayed is determined when the router initially starts and represents only
the type of cable that was attached when the router was started. If the cable type is changed
after startup, the show controller command display doesn??™t show the cable type of the new
cable.
Point-to-Point Communication Considerations
Point-to-point links have been the traditional connection of choice. The advantages to this
type of WAN access include the following:
?– Simplicity: Point-to-point communication links require minimal expertise to install
and maintain.
?– Quality: Point-to-point communication links usually offer a high quality of service,
provided that they have adequate bandwidth. The dedicated capacity gives no latency
or jitter between the endpoints.
?– Availability: Constant availability is essential for some applications, such as electronic
commerce, and point-to-point communication links provide permanent, dedicated
capacity that is always available.
NOTE The attached serial cable determines the DTE or DCE mode of the Cisco router.
Choose the cable to match the network requirement.
386 Chapter 5: WAN Connections
This type of WAN access also has some disadvantages, including the following:
?– Cost: Point-to-point links are generally the most expensive type of WAN access, and
this cost can become signi?¬?cant when they connect many sites.
Pages:
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534