RAID 60 is a type of nested RAID level that combines the block-level stripping feature of RAID level 0 with the dual parity of RAID level 6. It has the same multi-level disk set as of RAID 6, but supports more drives. RAID 60 is also known as RAID 6+0 and dual drive failure protection.
A telephone company (telco) provides telephone and data communication services. Most telephone companies offer Internet/telephone packages for a fixed monthly fee. Bundled telephony services are usually cheaper than individual services.This term is also known as telecommunications operator, communications service provider (CSP) and, in the U.S., local exchange carrier (LEC).
Customers use telco services for local, long distance and international phone calls. Fees for long distance and international calls are usually higher than local calls. Additionally, fees are usually charged for phone line rentals. There are also services with discounts for certain call types, including local, long distance and international calls.
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