after exam b Flashcards
A server administrator is configuring a new system for virtualization.
Which of the following configurations would provide virtualization
support on an Intel CPU?
❍ A. Install a 64-bit operating system ❍ B. Turn on HTT ❍ C. Allocate a larger amount of storage space to the virtualization partition ❍ D. Enable VT in the firmware
The Answer: D. Enable VT in the firmware
Many Intel processors support VT, or Intel Virtualization Technology.
This CPU (Central Processing Unit) feature for virtualization provides
hardware support for hypervisors and can make the virtualization process
much more efficient than running the virtual machines in a software-only
environment.
The computers in the shipping department are receiving the message
“No connectivity” on their computers. The ipconfig output on one of the
computers provides this information:
IPv4 Address: 192.168.1.22
Subnet Mask: 255.255.255.0
Default Gateway: 192.168.1.1
From this device, a technician is able to successfully ping 127.0.0.1 and
192.168.1.22. The technician can also ping other devices in the shipping
department, but cannot receive a ping response from servers in the data
center or from the 192.168.1.1 address.
Which of these would be the MOST likely cause of this issue?
❍ A. The DHCP server is down
❍ B. The wireless network is experiencing interference
❍ C. The local router is down
❍ D. The Internet provider is experiencing an outage
The Answer: C. The local router is down
The default gateway is commonly the local router for the IP subnet. If the
default gateway address of 192.168.1.1 is not responding to a ping, then
the router may not be operational.
The incorrect answers:
A. The DHCP server is down
The IPv4 address assigned to the computer shows an IP address that
was either assigned manually or through a DHCP (Dynamic Host
Configuration Protocol) server. None of the output or symptoms appear to
be related to a faulty DHCP server.
B. The wireless network is experiencing interference
Some ping responses are working normally, so there does not appear to be
any evidence of wireless interference.
D. The Internet provider is experiencing an outage
This issue did not appear to be related to any Internet connectivity, so the
status of the Internet link would not be an issue.
A server administrator would like to archive all of the company’s server
performance statistics for the past year. The total amount of space used by
the statistics files is 7.4 GB of information. Which of these can be used
to store this information onto a single disc with a minimum of wasted
space?
❍ A. Blu-ray SL
❍ B. CD-ROM
❍ C. DVD-RW DL
❍ D. Blue-ray DL
The Answer: C. DVD-RW DL
A DVD-RW DL (Digital Versatile Disc, Read/Write, Dual-Layer)
provides 8.5 GB (gigabytes) of available storage space.
The incorrect answers:
A. Blu-ray SL
A Blu-ray SL (Single-Layer) drives can provide 25 GB of storage space,
but there would be more wasted space on Blu-ray SL than DVD-RW DL.
B. CD-ROM
A CD-ROM (Compact Disc ROM) supports 700 MB (megabytes) of
storage space, making it too small to store the 7.4 GB of data on a single
disc.
D. Blue-ray DL
Blue-ray DL (Dual-Layer) can store 50 GB of data, making it the largest
amount of wasted space than the other formats.
In which of the following would a cable with a DB-9 connector be used?
❍ A. Attaching a mouse or keyboard to a desktop computer
❍ B. Configuring a router
❍ C. Connecting an external storage device
❍ D. Attaching a video camera to a computer
The Answer: B. Configuring a router
A DB-9 connector, or less commonly, DE-9 (D-subminiature size E, 9
pin) is a connector used to send serial signals to another device. A DB-9
connector on a computer is commonly used to connect to the management
interface of a switch, router, firewall, or another infrastructure device.
The incorrect answers:
A. Attaching a mouse or keyboard to a desktop computer
A mouse and keyboard commonly uses USB (Universal Serial Bus)
interfaces for connectivity.
C. Connecting an external storage device
External storage devices can connect using many different interface types,
including USB, Thunderbolt, eSATA (External Serial AT Attachment),
and others. The serial connection of a DB-9 connector would be too slow
to support the high throughput required from an external storage device.
D. Attaching a video camera to a computer
Video cameras or webcams commonly use USB connections to support a
high-speed connection across devices. DB-9 serial connections would be
too slow to support the throughput required of real-time audio and video.
A production editor is configuring a new video editing workstation.
Which of the following would be the MOST important component for
this system?
❍ A. RAID array
❍ B. Dual monitors
❍ C. High-end cooling
❍ D. Gigabit NIC
The Answer: B. Dual monitors
Video editors need one monitor for editing and a second monitor to view
the results of the output.
The incorrect answers:
A. RAID array
A RAID (Redundant Array of Independent Disks) array is commonly
used to provide uptime and availability of data if a drive fails. Video
editing workstations don’t usually have this uptime requirement, and most
systems can easily have a drive replaced and recover from a backup.
C. High-end cooling
A video editing workstation doesn’t create significantly more heat than
any other highly utilized computer. Standard air cooling configurations are
commonly used for video editing systems.
D. Gigabit NIC
Video editing generally occurs on a single system without the need for
any high-speed networking. Some video editing systems may connect to
remote storage at speeds exceeding 10 gigabits per second.
A system administrator has been asked to troubleshoot a print server that
is no longer operating. The print server displays an error code on the front
panel and does not respond to any user input. The system administrator
has created a list of four theories that might cause this particular error.
Which of the following would be the best NEXT troubleshooting step?
❍ A. Test each theory on a lab system
❍ B. Document the theories in the company knowledgebase
❍ C. Try different theories on the print server until the
problem is resolved
❍ D. Replace the print server device
The Answer: A. Test each theory on a lab system
Before a plan of action can be established, it’s important to know which
plan to follow. Testing each theory can help determine which guesses
might resolve the issue and which theories had no effect.
The incorrect answers:
B. Document the theories in the company knowledgebase
Once the problem has been resolved, the issue and resolution can be
documented. This is the last step of the troubleshooting process.
C. Try different theories on the print server until the problem is resolved
Randomly testing theories on the production device can be problematic. It
can be inefficient to randomly try potential fixes, and it’s possible to cause
more problems while haphazardly trying different options.
D. Replace the print server device
Before replacing hardware or making any changes, it’s useful to understand
the issue and why the problem may be occurring.
Which of these wireless standards was the first to introduce 54 Mbit/sec throughput on the 2.4 GHz band? ❍ A. 802.11g ❍ B. 802.11ac ❍ C. 802.11n ❍ D. 802.11b
The Answer: A. 802.11g
802.11g used the same 2.4 GHz frequencies as the 802.11b standard, but
the maximum theoretical throughput was increased from 11 megabits per
second to 54 megabits per second.
The incorrect answers:
B. 802.11ac
802.11ac networks operate exclusively in the 5 GHz range and can offer
a maximum of eight MU-MIMO (Multi-user multiple-input multipleoutput) streams with a total maximum throughput of nearly seven gigabits
per second.
C. 802.11n
The 802.11n standard can operate on either the 2.4 GHz or 5 GHz bands,
and the maximum theoretical throughput is 600 megabits per second.
D. 802.11b
The older 802.11b standard operates on the 2.4 GHz band, but the total
throughput is only eleven megabits per second.
A user is reporting this message on their Windows computer taskbar
icon: “Limited or No connectivity.” Which of the following would be the
best NEXT troubleshooting step?
❍ A. Check the local IP address configuration
❍ B. Restart the computer
❍ C. Ping the default gateway
❍ D. Check the switch VLAN configuration
❍ E. Check for a duplicate IP address
The Answer: A. Check the local IP address configuration
The message of limited connectivity is usually based on a system that
does not have access to network resources. This is often occurs when a
system is not able to contact a DHCP (Dynamic Host Configuration
Protocol) server and instead assigns itself an APIPA (Automatic Private
IP Addressing) address. A check of the local IP address may identify a
configuration error or an link-local address.
The incorrect answers:
B. Restart the computer
Restarting the computer might be a good troubleshooting task once
the root cause of the issue is identified, but it’s not the first step in the
troubleshooting process.
C. Ping the default gateway
Pinging the default gateway would probably be a good check once the
initial network configuration was validated, but it would not be the next
step in the list of troubleshooting tasks.
D. Check the switch VLAN configuration
Most switch VLAN configurations don’t change, so verifying the VLAN
details would probably not be the next step for troubleshooting.
E. Check for a duplicate IP address
Most operating systems will identify duplicate error messages with a clear
notification that a duplicate has been identified on the network.
A server administrator has configured a database server with a RAID 0
array containing four hard drives. An error notification from the RAID
controller states that disk 3 has failed. Which of the following would be
the BEST way to address this disk failure?
❍ A. Replace the drive and re-mirror the array
❍ B. Replace the drive and resynchronize the array
❍ C. Replace the drive and restore from backup
❍ D. Replace all drives and restore from backup
❍ E. Replace all drives and resynchronize the array
The Answer: C. Replace the drive and restore from backup
RAID 0 (Redundant Array of Independent Disks, Level 0) is a type
of array that provides an efficient storage method at the expense of
redundancy. Data in RAID 0 is striped across multiple drives, and if one
drive is lost then the data in the array is also lost. To resolve a bad RAID
0 drive, the bad drive will need to be replaced and all of the data must be
restored from a backup.
The incorrect answers:
A. Replace the drive and re-mirror the array
Since a portion of the data is lost when the RAID 0 drive failed, there’s no
way to re-mirror the lost data. The RAID 0 data must be restored
from backup.
B. Replace the drive and resynchronize the array
A RAID 5 array would maintain parity information if a drive was lost, and
RAID 5 data would only need to be resynchronized after replacing the
bad drive. Unfortunately, when a RAID 0 drive fails, data is lost and must
be restored from backup.
D. Replace all drives and restore from backup
Only the bad drive would need to be replaced when recovering from any
drive failure with RAID arrays.
E. Replace all drives and resynchronize the array
Only the bad drive would need to be replaced when recovering from any
drive failure with RAID arrays. Replacing perfectly good drives would be
an unnecessary and costly step.
A user on a Windows workstation would like to configure their system to
discover Apple devices on the LAN. Which of the following should be
installed on the Windows computer?
❍ A. Bonjour
❍ B. SNMP
❍ C. Finder
❍ D. NetBIOS
The Answer: A. Bonjour
Bonjour is an Apple protocol that assists with discovering Apple devices
on the local network. This protocol is included in macOS, and it can be
added to Windows by installing Apple software such as iTunes.
The incorrect answers:
B. SNMP
SNMP (Simple Network Management Protocol) is a protocol used
primarily by network management workstations to query infrastructure
devices. Many network administrators will use SNMP to gather
information from switches, routers, servers, and other devices. SNMP is
not commonly used outside of the network administration team.
C. Finder
Finder is the file management utility used in macOS, and Finder is not
available for Windows. The file manager included in Windows is File
Explorer, and there are no Apple protocols included with File Explorer.
D. NetBIOS
The NetBIOS (Network Basic Input/Output System) protocol was used
in earlier versions of Windows for name services and data transfers.
NetBIOS does not provide any Apple discovery features.
A network engineer is troubleshooting an issue communicating to the
Internet over a newly installed DSL connection. A laptop is connected to
a DSL router over twisted pair copper. The IP configuration of the
laptop is:
IP address: 169.254.228.109
Subnet mask: 255.255.0.0
DNS: 9.9.9.9
Which of the following should be the NEXT troubleshooting step?
❍ A. Reset the DSL modem
❍ B. Modify the subnet mask
❍ C. Change the DNS server address
❍ D. Check the status of the DHCP server
The Answer: D. Check the status of the DHCP server
A DHCP (Dynamic Host Configuration Protocol) server is the service
that automatically distributes IP addresses to the new devices that
connect to a network. If the DHCP isn’t available, the computer will
commonly auto-configure itself with an APIPA (Automatic Private IP
Addressing) address. Addresses between the range of 169.254.0.1 through
169.254.255.254 are assigned to devices using APIPA.
The incorrect answers:
A. Reset the DSL modem
There’s nothing in the configuration settings that would indicate an issue
with the DSL modem. If the DHCP service isn’t available, then a similar
APIPA address will still be assigned to the laptop.
B. Modify the subnet mask
The subnet mask in this exam has been assigned through the
APIPA process, and changing the mask wouldn’t solve the issue of
communicating to the Internet.
C. Change the DNS server address
Because the APIPA addressing limits communication to the local
subnet, changing the DNS server configuration would not solve this
communications issue.
A technician has replaced a laser printer toner cartridge, but now the
output does not appear as dark as the original toner cartridge. Which of
the following would be the best way to address this issue?
❍ A. Run a printer calibration
❍ B. Replace the fuser
❍ C. Use a laser printer maintenance kit
❍ D. Clean the OPC drum
The Answer: A. Run a printer calibration
A laser printer calibration allows the user to adjust the amount of toner
used for the output. Different models of toner cartridges can cause the
amount of toner output to vary, and the calibration process adjusts the
toner output to the best levels.
The incorrect answers:
B. Replace the fuser
The laser printer’s fuser uses heat and pressure to permanently affix the
toner to the page. The fuser does not have a significant effect on the toner
levels of the printed page.
C. Use a laser printer maintenance kit
Maintenance kits are designed to replace the most-used components of a
laser printer. These will wear over time, and the maintenance kit provides a
new working component. Most maintenance kits include new feed rollers,
new fuser units, and other moving parts.
D. Clean the OPC drum
The OPC (Organic Photo Conductor) drum is cleaned during each
rotation inside of the printer itself. The drum does not need to be manually
cleaned, and a dirty OPC drum would cause stray marks or lines on the
printed page and not a faded image.
A member of the accounting department would like to work remotely
while attending a conference in another city. Which of these technologies
would BEST provide this functionality?
❍ A. VLAN
❍ B. 802.11
❍ C. VPN
❍ D. NAT
The Answer: C. VPN
A VPN (Virtual Private Network) would allow a remote user to connect
back to the corporate office over a secure encrypted tunnel.
The incorrect answers:
A. VLAN
A VLAN (Virtual Local Area Network) is a common way to segment
devices on a switched network. VLANs do not provide any remote access
functionality.
B. 802.11
802.11 wireless networks are commonly used at conferences and hotels,
but the wireless network itself does not provide any remote access
capabilities. A VPN would operate over wired or wireless networks to
provide a secure remote access connection.
D. NAT
NAT (Network Address Translation) is used to change the source or
destination IP (Internet Protocol) address as it traverses the network. NAT
functionality is usually configured in a router or firewall. Although NAT
can help with IP address management, NAT does not provide any remote
access capabilities.
A digital graphics department has been using a SAN to store their image
files. The team now reports that all of the files on the SAN are no longer
accessible. Which of the following should be the FIRST thing to check
on the SAN?
❍ A. RAID array status
❍ B. CPU utilization
❍ C. Input voltage
❍ D. Cache hits
The Answer: A. RAID array status
A SAN (Storage Area Network) is a network-connected storage array. If
the SAN is unavailable, then it’s possible that the drive array is having a
technical issue. The first thing to check on the SAN is the sharing service
and network connectivity. Once those are verified to be working, the
troubleshooting can continue.
The incorrect answers:
B. CPU utilization
A high amount of CPU utilization on the SAN could cause the system to
perform slowly, but the drive array would usually still be available on the
network. A SAN is usually a single-purpose system, and it would not be
common to experience high utilization.
C. Input voltage
The input voltage of a device is determined during the installation process,
and it would be very unusual for the voltage to change. A power-related
issue on a device might be a power supply failure or an issue with the
power cable. An input voltage issue would not commonly be the first thing
to check.
D. Cache hits
Caching is designed to improve performance when reading or writing to
a drive. A caching problem may cause performance to suffer, but the data
would still be available to users.
A system administrator is connecting a remote site to the Internet over a
single pair of copper cabling. Which of the following is the administrator
using for this installation?
❍ A. PoE switch
❍ B. Hub
❍ C. DSL modem
❍ D. Repeater
The Answer: C. DSL modem
DSL (Digital Subscriber Line) Internet connections use the same single
copper pair of wires that are traditionally used by POTS (Plain Old
Telephone Service) lines. DSL modems connect to this pair of wires and
convert the signal to an Ethernet connection that can be used by other
devices.
The incorrect answers:
A. PoE switch
PoE (Power over Ethernet) switches commonly use all four pair of twisted
pair wires with an RJ45 connector.
B. Hub
Hubs were used in older networks to connect Ethernet devices, but most
networks use the more efficient switches. Hubs are not used as a direct
connection to the Internet.
D. Repeater
Repeaters will regenerate signals to extend the overall distance of a
network link. Repeaters are not used to connect sites to the Internet.
