Local Area Network Management,Design and Security. Hårdvara i LAN Kap.3 i kursboken Jag har kastat in delar i kapitlet. Servrar. Filhantering (fig 3.2) Diskserver Filserver Applikationsservrar Klient/server-teknik Databas Ekonomisystem Web/FTP/m.fl. ”Terminal”-teknik
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Filhantering (fig 3.2)
The disk server lets usersshare the disk.
Programs and data can be shared on the file server
Olika fabrikat sällan helt kompatibla
Serial ATA is a "serial" architecture as opposed to today's "parallel" ATA internal disc drive bus.Serial ATA wraps many bits of data into a packet and then at a higher speed (up to 50% higher) than parallel, transfers the packet of data down the wire to or from the host.(Point-to-point)
With ”parallel” ATA Cyclic Redundancy Checking (CRC) is performed on the data being transmitted back and forth but not on the commands.
Serial ATA integrates CRC on the command and data packet level for enhanced bus reliability. Cyclic redundancy code detects all single and double-bit errors and ensures detection of 99.998% of all possible errors.
A Serial ATA drive can transfer data at 150MB/sec on the bus to the host system with extremely reliable accuracy and the Serial ATA interface will continue to allow scalability for a very long time.
(Interna, på moderkortet)
UPS (Uninterruptible Power Supply)
Generation 1 Generation 2 Generation 3 Generation 4
200 GB 400 GB 800 GB 1.6 TB
Transfer Rate MB/sec 2:1 comp) 20-40 40-80 80-160 160-320