51. Deleted (Obsolete)
52. Building a baseline of performance data is an important part of any Server management function. The baseline shows records the performance under certain normal load conditions. The data can be used as a yardstick for measuring the impact of configuration changes or for capacity planning.
53. NIC (Network Interface Cards) load balancing is a technology in which multiple NICs are configured to form a single virtual connection to the external switch. Two or more NICs are grouped together forming one virtual connection. The entire group will have only one IP address. But all the NICs will have individual MAC addresses. There can be more than one group in a Server.
54. Storage tapes:
- DAT (Digital Audio Tape) drives are also called 4 mm DAT. DAT tape is 4 mm in width. DAT tapes can store data any where between 2 GB and 24 GB(Gig Bytes). The data transfer speed is approximately 20MB/min.
- DLT (Digital Linear Tape) drives: DLT drives can store much larger capacity, to the tune of 70GB. Transfer speeds for DLT drives can be as high as 300MB per minute.
- Mammoth: This type of tape drive also have high data transfer capacity, and medium capacity.
55. In Windows NT server, event viewer can be used for analyzing what has gone wrong with the service.
56. Server installation check list:
- Check for adequate power to supply to the Server,
- Check for proper network connectivity,
- Check for proper cabling,
- Verify whether you are using IRQs efficiently, and all connected devices are set properly to respond at the specified IRQs.
- Back-up: You need to have proper back-up
- Documentation: You need to document your server installation, that it will help diagnose the problem in the event of failure or for up gradation.
57. The following bus types are external to the server:
Note that Serial and parallel ports are very slow and not often used for reading or writing to mass storage devices.
58. An SBS (Stand By power Supply) is usually an off-line power supply. It senses the mains power and supplies power to the gear only when the mains power is lost.
On the other hand, a UPS is an on-line power supply. It draws the power from the mains and supplies conditioned power to the server. The power, usually, always flows from the UPS to the server. In the even of mains power failure, UPS continues to supply power to the server through its battery for a limited time.
59. Linux is a freely available operating system software. Linux is used widely on Internet. With the help of other freely available Web servers like Apache, it can used to host Web sites accessible on the Internet.
60. NDS is associated with Novell. It stands for NetWare Directory Services (NDS).