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CCNP boot camp : Prepare / Earn your CCNP™ Certification in Three weeks !!

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Vibrant Boot Camp provides instruction to meet every learning need, including:

• Intensive group instruction
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• Self-testing

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Common WAN terminology:

Customer Premises Equipment (CPE); devices physically located on the subscriber’s premises. This includes devices owned by the subscriber and leased by the service provider. Your CPE is the data terminal equipment (DTE), and the DCE is the device used to convert the user data from DTE into a form acceptable to the WAN service provider (EX: CSU/DSU). If the port is configured as DTE, it will require external clocking from the CSU/DSU or other DCE device. A modem, CSU/DSU, or TA/NT1 can be used to convert the user data from the DTE into a form acceptable to the WAN service facility.

Demarcation (demarc); the juncture at which the CPE ends and the local loop begins. It often occurs at a telecommunication closet on the client’s premises.

Local Loop (last mile); cabling (usually copper) that extends from the demarc in the WAN service provider’s CO.

CO (Central Office); a telco switching facility that provides the nearest point of presence for the provider’s WAN services.

Toll Network; the collective telco switched and facilities (called trunks) inside the WAN’s provider cloud.

Synchronous; uses an imposed time ordering at the sending and receiving ends of the link. Both sides agree to a certain speed, but the devices adjust their rates to match a clock source. Synchronous uses idle frames so that clocks can be adjusted on the receiving end, maintaining synchronization. Synchronous protocols allow more throughput than asynchronous protocols, but are more expensive.

Asynchronous; The lack of imposed time ordering on a bit stream. Uses start bytes and stop bytes. Asynchronous is not concerned with clock issues.

Multilink; this is a method of serial transfer load balancing in which packets are broken up before transmitted, sent across each link, and reassembled on the other side.