Chapter 15 - 03 - Discuss Data Backup, Retention, and Destruction - 07_ocred_fax_ocred.pdf

Certified Cybersecurity Technician Exam 212-82 Data Security Choosing the Backup Location fr...

Certified Cybersecurity Technician Exam 212-82 Data Security Choosing the Backup Location fr fH.| X Onsite Data Backup Cloud Data Backup Q Storing backup data at OQ Storing backup data in OQO Storing backup data on only i in fire- storage provided by an 3 sove sovie proof, indestructible safes provider v" Onsite backup data can be v' Data is secured from vv" The data dataisis easily accessed and i ity threats free from physical v such as fire, floods, etc. security threats v v' Data can be from anywhere v" Data loss risk is greater v" Problems with a regular of the backup LELE] 4 to backup Copyright © by EC I,M. All Rights Reserved, Reproduction Is Strictly Prohibited, Prohibited | | Choosing the Backup Location Onsite Data Backup This type of backup is performed within an organization. Onsite backup uses external devices such as a tape drive, DVD, hard disk, etc. The choice of external storage will depend on the amount of data to be backed up. = Advantages: o Provides immediate access to data. o Less expensive. o Media used for onsite backup is readily available and costs less. o Faster recovery. o Enhanced scalability. o Internet access is not required. = Disadvantages: o Requires direct human interaction to perform the backup. o Susceptible to theft or natural disasters. o Data loss risk is greater. Module 15 Page 1886 Certified Cybersecurity Technician Copyright © by EG-Council EC-Council All Rights Reserved. Reproduction is Strictly Prohibited. Certified Cybersecurity Technician Exam 212-82 Data Security Offsite Data Backup In an offsite backup, the backup is done at a remote location in fire-proof, indestructible safes. It either stores the data on physical drives, online, or a third-party backup service. Storing the data online helps in having an updated data backup available. = Advantages: o Implementing offsite backup creates multiple copies that can be stored in multiple locations. o Human error is minimal as the backup process is automated. o Data retention is unlimited. o Data is secured from physical security threats such as fire, floods, etc. = Disadvantages: o Problems with a regular data backup schedule. o Itis expensive, requiring a third-party service. o Requires an Internet connection, and the bandwidth consumption will be higher. o The process is lengthy and time consuming. Cloud Data Backup A Cloud backup is also known as online backup. It involves storing the backup on a public network or on a proprietary server. Usually, a third-party service provider hosts the proprietary server. The cloud data backup process works according to the requirements of the organization. If the organization needs a daily backup, the proprietary server will run a daily backup. Usually, any noncritical data is archived using a cloud data backup. = Advantages: o Cloud data backup is efficient as it uses technologies such as disk-based backup, virtualization, encryption, etc. o Many proprietors provide data monitoring and create reports for the organization. o The datain a cloud backup is easily accessed through the Internet. o The data is encrypted and free from physical security threats. = Disadvantages: o Data recovery can be time consuming. o Cloud data backup proprietors do not give any assurances or guarantees on the completion of a backup. The organization is responsible for checking whether the backup process was successful. Module 15 Page 1887 Certified Cybersecurity Technician Copyright © by EG-Council All Rights Reserved. Reproduction is Strictly Prohibited. Certified Cybersecurity Technician Exam 212-82 Data Security Types of Backup O All system data is copied to the backup media O All data that has been changed since the last full backup is copied to the backup media O Only files that have been changed or created after the last backup are copied to the backup media | Full Backup Full Backup Full Backup Full Backup Incremental 3 Differential 3 Differential 2 Incremental 2 Differential 1 Incremental 1 | Mand. Sunday Monday Y Tuesday Wednesday N Sunday Monday Tuesday Wednesday > Copyright © by EEC-Councll, C- cll. All Rights Reserved, ReproductionIs Strictly Prohibited Reproduction Prohibited Types of Backup An appropriate backup type is one that does not have a major impact on bandwidth, cost, time required, and the organization’s resources. The three most common backup types are full, differential, and incremental. Full backup: This is also called a normal backup. A full backup occurs automatically according to a set schedule. It copies all files and compresses them to save space. A full backup provides efficient data protection for the copied data. Differential backup: Differential backup is the combination of a full backup and an incremental backup. A differential backup backs up all the changes made since the last full backup. Example: Considering the above example, assume a full backup is scheduled for Sunday, and then a differential backup is scheduled to run until Saturday. Once the full backup is completed on Sunday, the differential backup will occur on Monday and the data that was changed will be backed up. On Tuesday, the backup will be for the changes made on Sunday and Monday. Then, on Wednesday, it will include the changes from Sunday, Monday, and Tuesday. Incremental backup: Backups only files that have been changed or created after the last backup are copied to the backup media. The last backup can be of any type. Before an incremental backup is performed, the system should be backed up using a full or normal backup. Example: Assume a full backup of the system is scheduled for Sunday, and an incremental backup is scheduled from Tuesday to Saturday. Once the full backup is Module 15 Page 1888 Certified Cybersecurity Technician Copyright © by EG-Council EC-Council All Rights Reserved. Reproduction is Strictly Prohibited. Certified Cybersecurity Technician Exam 212-82 Data Security performed on Sunday, the incremental backup on Monday will only backup the changes that occurred on Sunday. This process will continue until Saturday. 'N Full Backup \ Full Backup Incremental 3 Differential 3 Differential 2 Incremental 2 Differential 1 J Incremental 1 fi Sunday Monday Tuesday Wednesday Sunday Monday Tuesday Wednesday Figure 15.94: Backup types Module 15 Page 1889 Certified Cybersecurity Technician Copyright © by EG-Council All Rights Reserved. Reproduction is Strictly Prohibited.  CertifiedCybersecuri Cybersecurit Certified ty yTechnician Technician Data Security Data Security Exam Exam 212-82 212-82 Backup Back up Types Types: Advant : Advan ages and tages and Disad vanta Disadv antages ges “ Advantages Advantage s Disadvant ages Disadvanta ges Full Backup Backup v v’ Backup Backup process process is isslow slow Full ¥' v’ Restoration Restoration is isfast fast v v’ High storage requiremen High storage requirementsts v’v Faster Faster than than a a full full backup backup p Differential Differentia l ‘ v’ Restoring Restoring data data is is slower roront v v' Restoration Restoration faster faster than than anan incremental slower than than a a full full backup backup Backup incremental backupbackup Backup v'v' Slower ¥" Reduce d amoun Slower than than anan incremental incremental backup backup v Reduced amountt ofof storagestorage than than a a full full backup backup | | vv Fastest Fastest method method Incremental ncrementa Backup Backup vv Least Least amount amount ofof storage storage space space among among other other v’v Slowest Slowest restore restore speed speed among among other other backup backup types types backup types backup types an® an® A o) Copyright © by E L. All Rights Reserved Reproduction A 1S Strictly y Prohibited. Backup Backu Types: Advan p Types: Advant ages and Disad tages Disadv antage vanta gess Compare the Compare the advanta advantag es and disadva ges disadvan ntages tages of each backup backup type, and and then then select select one best suit ed for the one that that isis organization. best suited for the organiza tion. Full Full Backup Backup *= Advantages: Advantages: oo Itis Itis easy easy to restore; the process requires a file name and location. ©o Maintains Maintains different versions of the data. data. *= Disadvantages: Disadvantages: Oo AA time -con time-c suming onsuming proc ess beca process use each because each file file isis back backed up ever ed up every time aa full y time full back backup perf ormeed. up isis perform d. oo Larg Largee stor age requ storage iremments. require ents. Incr emenntal Increme tal Back up Backup *= Adva ntagges: Advanta es: ©o Fast er than Faster than a a full full back up. backup. oo Uses Uses stor age spac storage e effic space ientlly, efficient y, and and ther there e isis nono data data dupl duplication. ication. O © Leas t amo Least unt ofof stor amount storage age spac space among e amo ng otheother r backbackup types. up type s. ** Disa dvan tage s: Disadvantages: oo Data Data rest oration restorat ion isis time time cons umin consum g and ing and a a comp complex lex proc process; ess; first, first, a a full full back backup done , whic h is up isis done, foll owed which is followed byby anan incr emenntal increme tal back up. backup. Modul e 1515 Page Module Page 1890 1890 Certified Certif Cybersecuri ied Cybers ecuritytyTechni Technician Copyright cian Copyri ght © © byby EG-CoEG-Council uncil AllAllRights RightsReserv Reserved. Reproductio ed. Repro duction n is isStrictl Strictly Prohibited. y Prohib ited. Certified Cybersecurity Technician Exam 212-82 Data Security Differential Backup = Advantages: o Faster than a full backup. o Uses storage space more efficiently than a full backup; the backup only contains the changes made at regular intervals. o Data restoration is faster than an incremental backup. o Reduced amount of storage than a full backup. = Disadvantages: o Slower than an incremental backup. o Restoration process is slower than a full backup. Module 15 Page 1891 Certified Cybersecurity Technician Copyright © by EG-Council All Rights Reserved. Reproduction is Strictly Prohibited.