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What is a SPID?
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The Telco assigns you 2 SPID's (Service Profile Identifier) since your ISDN has 2 channels, this identifies your location so a call's data packets can be routed to you. You need to set up your ISDN equipment to use the SPID's SNET assigns you after you order your ISDN line (please see the material that came with your ISDN equipment for help). An ISDN SPID has the format: area code, ISDN phone number, 0101. For example, a typical SPID looks like: 26288410880101.
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What is Name Based Hosting (Host Headers)? Do I need an IP for each domain on my server?
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Name based hosting is a method used to allow a server to host multiple domains with only one IP address. You do not need an IP address for each site; in fact, you only need one IP for the entire server. Name based hosting does not affect the performance or appearance of the domains hosted. It's also a good way to economize on IP usage.
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What is RAID 1?
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Raid Level 1 means that one drive mirrors the other. In the event that one of your drives fails, the other will immediately continue to serve data. An additional feature with Raid is that, if one drive is overtaxed, the overflow requests will be handled by the second drive. RAID1 requires two drives, but you will lose the disk space of one of the drives. This means, for example, that two 36GB drives will only give you a total of 36GB of disk space.
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What is RAID 5?
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RAID Level 5 distributes the parity among the drives. This can speed small writes in multiprocessing systems, since the parity disk does not become a bottleneck. Because parity data must be skipped on each drive during reads, however, the performance for reads tends to be considerably lower. RAID Level 5 is n-1 meaning you lose the disk space of one drive in order to stripe data across the drives. A minimum of three drives is required for RAID5.
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What is the difference between SCSI and EIDE?
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The primary difference is that SCSI (Small Computer System Interface) has a processor built into the drive which allows for faster read / writes. The EIDE (Enhanced IDE) drives rely on the CPU. SCSI is the recommended option if you are planning to run a database. EIDE is suitable for standard web serving.
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