Latest Blog Posts for Doctor Computer

• What is SAN Zoning ?
  on Oct 22, 2009 in Article
  SAN zoning is a method of arranging Fibre Channel devices into logical groups over the physical configuration of the fabric.SAN zoning may be utilized to implement compartmentalization of data for security purposes.Each device in a SAN may be placed...
• What are Attacks against FCP ?
  on Oct 22, 2009 in Article
  Attacks against FCP (Fibre Channel Protocol) include:1. Node Name / Port Name spoofing at Port Login time2. Source Port ID spoofing on data-less FCP commands3. Snooping and spoofing on FC-AL4. Snooping and Spoofing after Fabric reconfiguration5. Deni...
• What is ESP over Fibre Channel?
  on Oct 22, 2009 in Article
  ESP (Encapsulating Security Payload) is an Internet standard for the authentication and encryption of IP packets.ESP is defined in RFC 2406: IP Encapsulating Security Payload (ESP).ESP is widely deployed in IP networks and has been adapted for use in...
• What is DASD ?
  on Oct 22, 2009 in Article
  DASD stands for Direct Access Storage Disk. DASD is storage which is attached directly to a computer. This differentiates DASD from storage which is attached to a network, such as Network Attached Storage (NAS) and Storage Area Networks (SAN's).
• What is a Differential Backup ?
  on Oct 22, 2009 in Article
  A differential backup is a backup of every file on a file system which has changed since the last full backup. The alternatives to a differential backup are incremental backup and full backup.A differential backup can be an optimal middle-ground betw...
• What is Network Backup ?
  on Oct 22, 2009 in Article
  Network backup is any backup system where the data to be backed up traverses the network to reach the backup media. Network backup typically requires a client-server software architecture. The backup server resides on a centralized server and the bac...
• What is Free Backup Software ?
  on Oct 22, 2009 in Article
  Constantly backing up is important because computers are not always perfect, and thus can crash, fail, and malfunction without a warning. Therefore, valuable information such as work documents, pictures of families, and videos that you've been wor...
• What is SAN (Storage Area Network) ?
  on Oct 22, 2009 in Article
  A SAN (Storage Area Network) is a network specifically dedicated to the task of transporting data for storage and retrieval. SAN architectures are alternatives to storing data on disks directly attached to servers or storing data on Network Attached...
• What is LUN masking ?
  on Oct 22, 2009 in Article
  LUN (Logical Unit Number) Masking is an authorization process that makes a LUN available to some hosts and unavailable to other hosts.LUN Masking is implemented primarily at the HBA (Host Bus Adapter) level. LUN Masking implemented at this level is v...
• What is Network Attached Storage ?
  on Oct 22, 2009 in Article
  Network Attached Storage (NAS) is a term used to describe a complete storage system which is designed to be attached to a traditional data network.This differentiates Network Attached Storage devices from SAN's (Storage Area Networks). A SAN is a sep...

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