Term
| For network administration, nothing is more important than ___ tolerance and ___ recovery. |
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Definition
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| The term ___ ___ refers to the ability of a computer or network to provide continued data availability if hardware failure occurs. |
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| RAID ___ combines unused disk space on two or more hard drives into a single logical volume, with data written to equally sized stripes across all the disks. |
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Term
| The downside of RAID ___ is that if any disk in the array fails, the data is lost and must be restored from backup. |
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| Because of its lack of fault tolerance, RAID ___ is rarely implemented. |
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| RAID ___ requires two hard disks and uses disk mirroring to provide fault tolerance. |
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Definition
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| RAID ___ ensures that the server continues operating in the event of primary disk failure. |
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Term
RAID ___ needs no additional software
because modern network operating systems have built-in support for it. |
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Definition
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Term
RAID ___ offers load balancing over
multiple disks, which increases read performance over that of a single disk. |
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| RAID ___ does not increase storage capacity. Two 100GB hard drives provide only 100GB of storage space. |
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| Both of the hard disks in RAID __ use the same hard disk controller. |
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Definition
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Term
| RAID 1 has a single point of failure, the ___ ___ ___. If it fails, the data is inaccessible on either drive. |
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Term
| An extension of RAID 1 is disk ____, which uses disk mirroring but places the hard disks on separate hard disk controllers, eliminating the single point of failure. |
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Definition
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Term
| RAID ___ is also known as disk striping with parity |
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Definition
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Term
| RAID ___ uses distributed parity to write information across all disks in the array. |
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Definition
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Term
| Unlike RAID 0, RAID ___ includes parity information in the striping, which provides fault tolerance (the parity information can re-create the data if a failure occurs) |
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Definition
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Term
| RAID 5 requires a minimum of ___ disks, with the equivalent of a single disk used for the parity information. |
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Definition
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Term
| In RAID 5, if you have three 1TB hard disks, you have __TB of storage space |
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Definition
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Term
| A system using RAID __ can continue to function if a single drive failure occurs. |
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Definition
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Term
| The initial cost of implementing RAID __ is higher than other fault- tolerance measures |
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Definition
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Term
| RAID __ combines RAID levels 1 and 0 |
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Definition
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Term
| RAID 10 requires the use of __ disks. |
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Definition
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Term
| The benefits of RAID __ are the performance capability of a stripe set plus the fault tolerance of a mirrored solution. |
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Definition
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Term
| The drawbacks of RAID __ are high overhead and decreased write performance |
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Definition
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Term
| For server fault tolerance, two key strategies are ___ servers and server ___. |
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Definition
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Term
| In a ___ configuration, the secondary server connects to the primary and is ready to take over the server functions at a moment’s notice. |
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Definition
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Term
| In a failover configuration, the primary server communicates with the secondary server by issuing special notices called ___s. If the secondary server stops receiving these messages, it assumes the primary has died and takes over. |
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Definition
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Term
| Server ___ involves grouping servers for the purposes of fault tolerance and load balancing. |
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Definition
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Term
| In a server ___ configuration, other servers can compensate for the failure of a single server. |
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Definition
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Term
| The term server cluster is synonymous with server ___. |
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Definition
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Term
| Server clustering increases ___ ___ by distributing the workload over multiple systems, and increases availability by having ___ servers if a system crashes. |
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Definition
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Term
| With adapter ___, groups of network cards are configured to act as a single unit. |
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Definition
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Term
| ___ ___ enables one network card to be configured as the primary device and others as secondary. If the primary adapter fails, one of the other cards can take its place without the need for intervention. |
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Definition
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Term
| With ___ ___, software controls the network adapters so workloads can be distributed evenly among the cards |
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Definition
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Term
| Adapter teaming allows the bandwidth of multiple network cards to be ___ed (combined into a single connection). |
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Definition
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Term
| ___ ___ ___ protocol enables multiple hosts on the same network to share a set of IP addresses. |
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Definition
| Common Address Redundancy Protocol (CARP) |
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Term
| Common Address Redundancy Protocol (CARP) provides ___ redundancy and is commonly used with routers and firewalls to provide ___ balancing. |
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Definition
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Term
| CARP is an open source protocol enabling multiple hosts to share a set of ___ ____. |
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Definition
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Term
| With CARP, the hosts within the redundant group are known as the ___ of ___. |
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Definition
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Term
| CARP requires a minimum of one common virtual host ___ and a set of virtual host ___ ___ (one for each machine in the group). |
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Definition
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Term
| A ___ is a total failure of the power supplied to the server. |
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Definition
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Term
| A ___ is a short (usually less than 1 second) but intense increase in voltage. |
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Definition
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Term
| Compared to a spike, a ___ is a considerably longer (sometimes many seconds) but usually less intense increase in power. |
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Definition
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Term
| A ___ is a short-term voltage drop (the opposite of a spike) that can cause a server to reboot. |
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Definition
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Term
| A ___ is a drop in voltage that usually lasts more than a few minutes. |
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Definition
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Term
| The ___ backup method copies all files and directories from the hard disk to the backup media. |
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Definition
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Term
| A ___ backup can take an extremely long time and can considerably slow down the network. |
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Definition
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Term
| The ___ backup focuses only on data that has changed since the last full backup but does not reset the archive bit. |
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Definition
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Term
| The ___ backup focuses on data that has changed since the last full backup and resets the archive bit. |
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Definition
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Term
| Both ___ and ___ backups clear the archive bit after files have been backed up. |
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Definition
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Term
| Restoring a system after a differential backup requires __ backup sets. |
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Definition
2
last full + last differential |
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Term
| Restoring a system after an incremental backup requires __ backup sets. |
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Definition
multiple
last full + every incremental since last full |
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Term
| With a full backup from Sunday and incremental backups from Monday, Tuesday, and Wednesday, a total of __ backup sets is needed to restore the data. |
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Definition
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Term
| The most common backup rotation strategy is ___, ___, ___. |
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Definition
| grandfather, father, son (GFS) |
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Term
| A GFS rotation may require 12 backup sets: __ for daily backups (son), __ for weekly backups (father), and __ monthly backups (grandfather). |
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Definition
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Term
| A backup strategy must include ___ storage to account for theft, fire, flood, or other disasters. |
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Definition
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Term
A ___ spare enables a RAID system to automatically fail over to a spare hard drive if one of the other drives in the
array fails. |
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Definition
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Term
| A ___ spare does not require any manual intervention. |
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Definition
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Term
| Replacing a failed component while the system is running is called ___ ___. |
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Definition
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Term
| A ___ ___ is a component that requires manual intervention in case of failure. |
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Definition
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Term
| A ___ spare configuration typically requires a reboot of the system. |
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Definition
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Term
| Replacing components only after the system is completely powered off is called ___ ___. |
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Definition
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Term
| The term ___ ___ is applied to a device that can be replaced while the system is still running but requires some kind of manual intervention to disable the device before it can be removed. |
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Definition
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Term
| A ___ ___ site provides a base from which the company can be operated during a disaster. |
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Definition
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Term
| A ___ recovery site can be operational in a relatively short amount of time, such as a day or two. |
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Definition
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Term
| A ___ recovery site can be operational in a moment's notice. |
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Definition
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Term
| A ___ recovery site has the equipment needed to bring the network to an operational state but requires configuration and potential database updates. |
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Definition
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Term
| A ___ of ___ strategy ensures that bandwidth is used in the best possible way. |
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Definition
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Term
| ___ features enable administrators to predict, monitor and control bandwidth use to ensure that bandwidth is available to the applications that need it. |
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Definition
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Term
| ___-sensitive applications need bandwidth for quick delivery so network lag time does not impact their effectiveness. This includes voice and video transfer. |
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Definition
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Term
| Latency-___ applications include bulk data transfers such as huge backup procedures and FTP transfers. |
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Definition
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Term
With QoS ___ queuing, traffic is placed in order based on its importance on delivery time. All data is given access, but the more important and latency-sensitive data is given
higher priority. |
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Definition
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Term
| QoS is used with high-___ applications such as VoIP, video applications, and unified communications. |
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Definition
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Term
| ___ ___ is a QoS strategy designed to enforce prioritization policies on the transmission of data throughout the network. |
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Definition
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Term
| With traffic shaping by ___, administrators can categorize specific types of network traffic and assign that category a bandwidth limit. |
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Definition
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Term
| With traffic shaping by ___, administrators can allocate a certain bandwidth to each user. |
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Definition
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Term
| With traffic shaping by ___, administrators can allocate bandwidth to applications that are considered mission-critical. |
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Definition
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Term
| ___ ___ involves delaying the flow of data traffic that is designated as less important. |
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Definition
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Term
| In networks where a large number of people access similar websites, ___ can greatly increase network performance. |
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Definition
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