Writing Assignment: Module 03 Flashcards
What purpose does a business resumption plan serve?
A business resumption plan (BR plan) usually has two major elements: the disaster recovery plan (DR plan), and the business continuity plan (BC plan),
The DR plan describes the efforts to resume normal operations.
The BC plan contains steps for implementing critical business functions using alternate mechanisms until normal operations can be resumed.
What are the two major components of BRP, and how are they related?
Two major components of a BRP plan are: the disaster recovery plan, and the business continuity plan
What is the primary site?
The primary site is the location or group of locations at which the organization executes its functions.
What is the difference between a backup and an archive?
A data backup is typically a snapshot of the data from a specific point in time. An archive is a long-term storage of a document or data file, usually for legal or regulatory purposes.
What is a retention schedule?
A retention schedule guides the frequency of replacement and the duration of storage. Both data backups and archives are based on a retention schedule.
What are the major types of backups?
The three basic backups are: Full, differential, and incremental backups
What is encompassed in a full backup?
A full backup is a full and complete backup of the entire system including all applications, operating systems components, and data. It is large as it is comprehensive.
What is encompassed in a differential backup?
A differential backup is the storage of all files that have changed or been added since the last full backup. It works faster and uses less storage space, but grows larger with each passing day.
What is encompassed in an incremental backup?
An incremental backup only archives the files that have been modified since the last backup, and thus requires less space and time than the differential to create. The downside to incremental backups is that if an incident occurs, multiple backups need to b restored to restore the full system.
What is a redundant array of independent disks (RAID), and what are its primary uses? How can it be used in a backup strategy?
RAID systems can overcome some of the limits of magnetic tape backup systems. They also provide enhanced capabilities: unlike tape backups, RAID uses a number of hard drives to store information across multiple drive units. For operational redundancy, this can spread out data and, when coupled with checksums, and eliminate or reduce the impact of a hard drive failure.
What is disk striping, and how might it be considered the opposite of disk mirroring?
Disk striping (RAID 0) is a process in which data segments, called stripes, are written in turn to each disk drive in the array. Unfortunately failure of one drive may make all data inaccessible. Disk mirroring (RAID 1) on the other hand uses twin drives in a computer system. The computer records all data to both drives simultaneously, providing a backup if the primary drive fails. The downside is that this is a very expensive and inefficient use of hardware.
In what way are the backup needs of systems that use databases different from backups to safeguard other systems that don’t use databases?
When systems make use of databases, whether hierarchical, relational, or object oriented, they require special considerations when planning backup and recovery procedures. Some applications use files systems and databases in ways that invalidate the customary way of doing backup and recovery. In some cases, applications write large binary objects as files and manage pointers, and create internal data structures in ways that make routine backups unable to handle the concurrency or complexity of the application.
Beyond simply identifying what to back up, when to back it up, and how to restore it, what should a complete backup recovery plan include?
Each backup and recovery setting should be provided with complete recovery plans, including testing and rehearsal.
What is bare metal recovery?
Bare metal recovery refers to technologies designed to replace operating systems and services when they fail. These applications allow you to reboot the affected system and services when they fail. These applications allow you to reboot the affected system from a cd-rom or other remote drive and quickly restore your OS by providing images backed up from a known stable state.
What is electronic vaulting, and how is it used in a backup strategy?
Electronic vaulting is the bulk transfer of data in batches to an off-site facility. This transfer is usually conducted via leased lines or data communications services provided for a fee, although recent developments in online/cloud backup are quickly taking over this market.
