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| Customer Premise Equipment: Devices that are physically located on the subscriber's premises. These devices are usually owned by the customer or leased from the WAN provider. |
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| DEMARCATION: The point where CPE ends and the local loop begins, usually in the customer's main data closet. |
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| (Last Mile): Cabling that extends from the demarc to the WAN service provider's central office. |
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| CO The WAN service provider's switching facility, which provides the nearest point of presence (POP) for the service. The service provider's switching facility can also be called a POP. |
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| DATA COMMUNICATIONS EQUIPMENT |
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| A device at the end of the local loop that attaches to the DTE. The DCE provides clocking and conversion of data into a suitable format for transmission across the local loop. Examples of Data Communications Equipment include modems, terminal adapters (TA), network termination (NT1), and channel service unit/data service unit (CSU/DSU). |
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| HIGH LEVEL DATA LINK CONTROL default encapsulation used by Cisco routers over synchronous serial links |
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| point to point protocol - encapsulate network layer information for transmission over point to point link |
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| what are the 2 parts of ppp |
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LCP Link Control Protocol
NCP Network Control Program |
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| LCP establishes confiures tests connetion |
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| ncp - configures many different ntwork layer potocols |
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| PPP physical layer works on dte/dce physical interFaces (4 types) |
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Asynchronous serial
Synchonous serial
high speed Serial Interfase HSSI
ISDN |
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LCP LINK CONTROL PROTOCOL DOES 4 THINGS
LINK ESTABLISHMENT
LINK QUALITY DETERMINATION
NETWORK LAYER PROTOCOL NEGOTIATION
LINK TERMINATION |
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| 2 types of authentication for PPP |
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Password Authentication Protcol PAP
Challenge Handshake Authentication Protocol CHAP |
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| INTEGRATED SERVICES DATA NETWORK |
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HOW MANY BEARER CHANNELS DOES BRI CARRY?
HOW MANY DATA CHANNELS? |
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| TWO B CHANNELS OF 64Kbps AND ONE DATA CHANNEL OR D CHANNEL OF 16K |
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| WHAT IS THE NAME OF AN ISDN BRI |
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| AN ISDN DCE CONNECTION TO THE LOCAL LOOP IS CALLED? |
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| NETWORK TERMINATION 1 (NT1) |
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| ISDN PRI USES A SPECIFIC DCE CALLED? |
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| DSU/CSU DATA SERVICE UNIT-CHANNEL SERVICE UNIT |
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| DIAL ON DEMAND ROUTING - ESTABLISH AND TERMINATE NETWORK CONNECTIONS ON ISDN |
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| high-speed, packet-switching WAN protocol |
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| cyclic redundancy checking - PRODUCES A FRAME CHECK SEQUENCE |
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| WHAT IS A DISCARD ELIGIBILITY BIT USED FOR AND WHAT ARE THE VALUES. |
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| USED BY FRAME RELAY TO MANAGE CONGESTION. A VALUE OF 1 CAN BE DROPPED AND 0 ARE ALWAYS KEPT |
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| PERMANENT VIRTUAL CIRCUIT |
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| DATA LINK CONNECTION ID- ADDRESSING SCHEME W/IN FRAME RELAY NETWORK |
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| WHAT ARE THE 2 METHODS THAT DLCI'S CAN BE MAPPED? |
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| LOCAL MANAGEMENT INTERFACE -set of enhancements to the Frame Relay protocol specifications |
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