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首页提升IT考试通过率的高效安全方法:E20-001V2.0.pdf详解
提升IT考试通过率的高效安全方法:E20-001V2.0.pdf详解
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"E20-001V2.0.pdf"是一份专注于IT考试准备的研究方案文档,提供了针对网络管理员的案例题以及相关知识点解答。这份文档旨在帮助考生更安全、轻松地通过各种信息技术考试。 在文档中,我们看到四个相关的问题及其答案: 1. 第一个问题涉及网络硬件知识,考察的是存储区域网络(SAN)中的光纤通道HBA(Host Bus Adapter,主机总线适配器)和FPort(Fabric Port,光纤端口)的识别。根据提供的Exhibit(图表),正确答案是B选项:7和5,表示HBA的编号和FPort的编号分别为7和5。 2. 第二题关注数据复制技术。创建点对点时间副本后,推荐跟踪源设备和目标设备的变化,其目的是为了加速源设备与目标设备的数据同步(B选项),因为这有助于缩短恢复时间,特别是重启操作时的恢复时间目标(RPO)。 3. 第三个问题是关于缓存的管理。脏位(Dirty Bit)标志用于标识被修改但尚未写入磁盘的数据(A选项),它在维护数据一致性方面扮演着关键角色。 4. 最后一个问题考察远程复制解决方案的带宽需求。没有提供具体选项,但可以推测这是在询问哪种远程复制方法具有最低的带宽要求。在实际环境中,低带宽需求可能与压缩、差分或增量复制技术相关,但文档中并未给出具体答案,考生需要根据自己的理解或参考其他资料来选择最合适的答案。 总结来说,这份文档通过案例分析和问答形式,涵盖了网络硬件配置、数据复制技术、存储系统管理和远程复制技术的基础概念,适合备考者深入理解和掌握这些核心知识点,以提高应对实际IT考试的能力。
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Which data access pattern will have its performance affected most by slow seek times?
A. Sequential, large writes
B. Sequential, small reads
C. Random, small writes
D. Random, large reads
Answer: C
QUESTION NO: 50
Which Connectrix switches can be managed using WebTools
A. M-Series
B. B-series
C. MDS-Series
D. CX-Series
Answer: B
QUESTION NO: 51
You have five disks in a RAID 0 set, and have assigned a stripe depth of 128 blocks (64 kB). What is the
STRIPE size (kB)?
A. 320
B. 128
C. 256
D. 64
Answer: A
QUESTION NO: 52
Why would you implement an iSCSI solution?
A. Block storage over IP is much faster than FC
B. All storage arrays supply Gage ports
C. Leverages existing IP network infrastructure
D. iSCSI HBAs are inexpensive
Answer: C
QUESTION NO: 53
What is a disadvantage of storage array based local replication?
A. Requires an alternate host for Business Continuance operations
B. Replication is performed at the array device level
C. Cannot span storage arrays
D. Uses host CPU resources
Answer: C
QUESTION NO: 54
Which network technology uses time division multiplexing for sending data from multiple subscribers as
an optical signal?
A. SONET
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B. T3
C. Gigabit Ethernet
D. DWDM
Answer: A
QUESTION NO: 55
What does partitioning do?
A. Divides a logical disk into physical zones
B. Divides a logical disk into physical volumes
C. Divides a physical disk into logical volumes
D. Divides a physical disk into logical zones
Answer: C
QUESTION NO: 56
Which storage method will make data most accessible?
A. Optical disk
B. Magnetic Disk
C. Jukebox
D. Tape
Answer: B
QUESTION NO: 57
Which task is an example of monitoring the utilization of a data center object?
A. Determining which device ports have the highest rates of errors
B. Viewing a list of file systems that are nearly full
C. Monitoring the status of processes on the host
D. Listing the number of disks in all storage arrays
Answer: B
QUESTION NO: 58
Which event is known as a head crash?
A. Two R/W heads have touched each other
B. A read head and a write head have touched each other
C. A R/W head has touched the disk data area
D. Two adjacent disk platters have touched each other
E. SAN
Answer: C
QUESTION NO: 59
What is a disadvantage of array based remote replication?
A. Uses host CPU resources
B. Cannot manage log shipping
C. Limited to specific databases
D. Limited to specific operating systems
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Answer: B
QUESTION NO: 60
What is a valid member of a zone in a SAN?
A. The IP address of a host
B. A Domain ID
C. The serial number of a storage array
D. A HBA WWPN
Answer: D
QUESTION NO: 61
What failure does RAID technology guard against?
A. Host bus Adapter failures
B. Host failures
C. Switch Failure
D. Disk Failure
Answer: D
QUESTION NO: 62
What is an advantage of using tape over disk as the backup destination device?
A. Faster restore time
B. Random access
C. RAID Protection
D. Portability
Answer: D
QUESTION NO: 63
Which sequence of activities describes a read cache hit?
1. Read data is sent to the host
2. Host sends read request to storage system
3. Cache is searched, and data is found
A. 2, 3, 1
B. 3, 1, 2
C. 1, 3, 2
D. 1, 2, 3
Answer: A
QUESTION NO: 64
What is the process of dividing a disk into logical containers?
A. Zoned-bit recording
B. Partitioning
C. Sectoring
D. Logical Block Addressing
Answer: B
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