Network Operations (2) Flashcards
When a service fails to start on a Windows server, an entry is typically created in which of the following event logs?
Security
Setup
System
System
On a Windows system, information about services, including successful service starts and failures, is recorded in the System event log. The Application, Security, and Setup logs typically do not contain this type of information
The precise locations of devices in a datacenter are typically documented in which of the following documents?
Rack diagram
Network map
Wiring schematic
Rack diagram
Datacenters typically mount components in racks, 19-inch-wide and approximately 6-foot-tall frameworks in which many networking components are specifically designed to fit. A rack diagram is a depiction of one or more racks, ruled out in standardized 1.752-inch rack units, and showing the exact location of each piece of equipment mounted in the rack. Network maps, wiring schematics, and logical diagrams are documents that document the relationships between components, not their precise locations
Which of the following statements about network maps is true?
Network maps are typically drawn to scale.
Network maps typically contain more information than network diagrams.
Network maps must be read/write accessible to all personnel working on the network.
Network maps typically contain more information than network diagrams.
Network diagrams typically specify device types and connections, but network maps can also include IP addresses, link speeds, and other information. Network maps diagram the relationships between devices, and provide information about the links that connect them, but they are not drawn to scale and usually do not indicate the exact location of each device. Although universal accessibility would be desirable, there are individuals who should not have access to network maps and other documentation, including temporary employees and computer users not involved in IT work. A network maps include all networking devices, not just cable runs and endpoints
Which of the following RAID levels uses disk striping with distributed parity?
RAID 0
RAID 1
RAID 5
RAID 5
Redundant Array of Independent Disks (RAID) is a technology for storing data on multiple hard disk drives, providing fault tolerance, increased performance, or both. The various RAID levels provide different levels of functionality and have different hardware requirements. RAID 5 combines disk striping (blocks written to each disk in turn) with distributed storage of parity information, for fault tolerance. RAID 0 provides data striping only. RAID 1 provides disk mirroring. RAID 10 creates mirrored stripe sets
While negotiating a new contract with a service provider, you have reached a disagreement over the contracted reliability of the service. The provider is willing to guarantee that the service will be available 99 percent, but you have been told to require 99.9 percent. When you finally reach an agreement, the negotiated language will be included in which of the following documents?
SLA
AUP
NDA
SLA
A service level agreement (SLA) is a contract between a provider and a subscriber that specifies the percentage of time that the contracted services are available. Acceptable use policies (AUPs) specify whether and how employees can utilize company-owned hardware and software resources. A nondisclosure agreement (NDA) specifies what company information employees are permitted to discuss outside the company. A Bring Your Own Device (BYOD) policy specifies the personal electronics that employees are permitted to use on the company network and documents the procedures for connecting and securing them
A server with dual power supplies must be running in which of the following modes for the system to be fault tolerant?
Combined mode
Redundant mode
Individual mode
Redundant mode
A server with dual power supplies can run in one of two modes: redundant or combined. In redundant mode, both power supplies are capable of providing 100 percent of the power needed by the server. Therefore, the server can continue to run if one power supply fails, making it fault tolerant. In combined mode, both power supplies are needed to provide the server’s needs, so a failure of one power supply will bring the server down. Individual mode and hot backup mode are not terms used for this purpose
Redundant power circuits can enable a server to continue running in spite of which of the following events?
A citywide power outage
A server power supply failure
An uncorrected building circuit failure
An uncorrected building circuit failure
If a server is connected to two building circuits, it can continue to function if the breaker for one circuit trips and remains uncorrected. All of the other scenarios will bring the server down, unless additional redundancies are in place
Installing an electrical generator for your datacenter is an example of which of the following fault tolerance concepts?
Uninterruptible power supply (UPS)
Power redundancy
Dual power supplies
Power redundancy
Power redundancy is a general term describing any fault tolerance mechanism that enables equipment to continue functioning when one source of power fails. A UPS is a device that uses battery power, not a generator. The term dual power supplies refers to the power supply units inside a computer, not a separate generator. The term redundant circuits refers to multiple connections to the building’s main power, not to a generator
Which of the following Redundant Array of Independent Disks (RAID) levels provides fault tolerance by storing parity information on the disks, in addition to the data? (Choose all correct answers.)
RAID 0
RAID 1
RAID 5
RAID 5
Redundant Array of Independent Disks (RAID) is a technology for storing data on multiple hard disk drives, providing fault tolerance, increased performance, or both. The various RAID levels provide different levels of functionality and have different hardware requirements. RAID 5 combines disk striping with distributed storage of parity information, which provides fault tolerance. The parity information enables the array to rebuild a disk whose data has been lost. RAID 0 uses data striping only (blocks written to each disk in turn), which does not provide any form of fault tolerance. RAID 1 provides fault tolerance through disk mirroring. RAID 10 creates fault-tolerant mirrored stripe sets
Which of the following RAID levels provide fault tolerance without using parity data? (Choose all correct answers.)
RAID 0
RAID 1
RAID 5
RAID 10
RAID 1
RAID 10
Redundant Array of Independent Disks (RAID) is a technology for storing data on multiple hard disk drives, providing fault tolerance, increased performance, or both. The various RAID levels provide different levels of functionality and have different hardware requirements. RAID 1 and RAID 10 both use disk mirroring to provide fault tolerance, which does not require parity data. RAID 0 uses data striping only (blocks written to each disk in turn), which does not provide any form of fault tolerance. RAID 5 combines disk striping with distributed storage of parity information
Which of the following is not a fault tolerance mechanism?
Port aggregation
Clustering
MTBF
MTBF
Mean Time Between Failures (MTBF) is a hardware specification used to predict the approximate lifetime of a component. It does not refer to any type of fault tolerance mechanism. Port aggregation, clustering, and uninterruptible power supplies (UPSs) are all mechanisms that provide fault tolerance in the event of network adapter, server, and power failures, respectively
Which of the following backup job types does not reset the archive bits of the files it backs up?
Full
Incremental
Differential
Differential
Differential backups use the archive bit to determine which target files to back up. However, a differential backup does not reset the archive bit. Full backups do not pay attention to the archive bit because they back up all of the files. A full backup, however, does clear the archive bit after the job is completed. Incremental backups also use the archive bit to determine which files have changed since the previous backup job. The primary difference between an incremental and a differential job, however, is that incremental backups clear the archive bit so that unchanged files are not backed up. There is no such thing as a supplemental backup job
Which of the following RAID levels does not provide fault tolerance?
RAID 0
RAID 1
RAID 5
RAID 0
Redundant Array of Independent Disks (RAID) is a technology for storing data on multiple hard disk drives, providing fault tolerance, increased performance, or both. The various RAID levels provide different levels of functionality and have different hardware requirements. RAID 0 uses data striping only (blocks written to each disk in turn), which does not provide any form of fault tolerance. RAID 1 provides disk mirroring. RAID 5 combines disk striping with distributed storage of parity information. RAID 10 creates mirrored stripe sets. These three levels all provide fault tolerance
Which of the following is the criterion most commonly used to filter files for backup jobs?
Filename
File extension
File attributes
File attributes
The archive bit that backup software uses to perform incremental and differential jobs is a file attribute, so this is the most commonly used filter type. It is possible to filter files based on their names, their extensions, and their size, but these are not used as often as the archive file attribute
What are the three elements in the Grandfather-Father-Son media rotation system?
Hard disk drives, optical drives, and magnetic tape drives
Incremental, differential, and full backup jobs
Monthly, weekly, and daily backup jobs
Monthly, weekly, and daily backup jobs
The generational media rotation system uses the terms grandfather, father, and son to refer to backup jobs that are run monthly, weekly, and daily. The jobs can be full, incremental, or differential, and the terms have nothing to do with whether the backup medium is a hard disk, optical, or any type of tape drive
