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12 Cards in this Set
- Front
- Back
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Access Link (definition)
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Layer 1 physical connection typically between customer router and Frame Relay switch.
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Back-to-back Link (definition)
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Serial connection between two routers using both a DTE cable & a DCE cable
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clocking (definition)
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Process of supplying a signal over a cable so that the receiving device can sync with the sending device.
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DTE (Layer 1) (definition)
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Data Terminal Equipment. At layer 1 DTE syncs its clock based on the clock sent by the DCE
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CSU/DSU (definition)
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Channel Service Unit/Data Service Unit. A device that understands the layer 1 details of serial links installed by the Telco & how to use a serial cable to communicate with routers.
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Frame Relay Virtual Circuit
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Path a frame travels between each pair of routers.
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Point-to-point leased lines could also be called...
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leased line
Leased circuit link serial link serial line point-to-point link circuit |
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T1 vs E1
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T1 - 1.544 Mbps
E1 - 2.048 Mbps |
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HDLC
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High-level Data Link Control - Bit-oriented synchronous data link layer protocol.
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DS0 & DS1
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DS0 - 64 kbps link (needed for 1 voice call)
DS1 - equal to a T1 1.544 |
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LAPF
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Link Access Procedure Frame - frame relay header and trailer are defined by this protocol
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packet switching service
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large number of routers connected to the service using a single serial link from each router into the packet-switching service.
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