after exam c Flashcards
A system administrator has been assigned the task of installing an
operating system, application, and data onto a cloud-based server.
Which of these best describes this scenario?
❍ A. Infrastructure as a Service
❍ B. Platform as a Service
❍ C. Hybrid Cloud
❍ D. Software as a Service
The Answer: A. Infrastructure as a Service
IaaS (Infrastructure as a Service) provides the CPU, memory, storage,
and other infrastructure components necessary for the installation of an
operating system and application.
The incorrect answers:
B. Platform as a Service
PaaS (Platform as a Service) is a cloud deployment model that provides
a modular development platform. Users can create their own applications
based on the hosted modules available from a PaaS deployment.
C. Hybrid Cloud
The combination of both public and private cloud deployments results in
a hybrid model. This model allows organizations to provide both public
services to their customers and private services to use internally.
D. Software as a Service
Software as a Service is a cloud deployment model that provides ondemand software. The user is not responsible for hosting, development, or
ongoing management of a SaaS-based deployment.
A systems administrator has added a new video adapter to a desktop
computer, installed the latest video driver, and rebooted the system.
When the system starts, it continuously reboots before it reaches the
login prompt. Which of the following would be the BEST next troubleshooting step?
❍ A. Press F8 during startup and choose “Boot from last known
working configuration”
❍ B. Upgrade the system BIOS using an update file from the
motherboard manufacturer
❍ C. Disconnect all USB storage devices and restart the system
❍ D. Reinstall the operating system
The Answer: A. Press F8 during startup and choose
“Boot from last known working configuration”
If a recent configuration causes a boot issue, Windows provides a way to
restart the operating system using the last known working configuration.
Each time Windows successfully boots, it makes a backup of that
configuration. If the startup option to “boot from last known working
configuration” is selected, that working backup is used instead of the
current Windows configuration. This can help resolve reboot issues like
those detailed in this question.
The incorrect answers:
B. Upgrade the system BIOS using an update file from the
motherboard manufacturer
There’s nothing in this question that would indicate that the BIOS is
causing any issues with the computer.
C. Disconnect all USB storage devices and restart the system
If Windows tries to boot from a USB storage device and a problem occurs,
an error message will be provided on the screen. The computer does not
continue to reboot when attempting to boot from a USB storage device.
D. Reinstall the operating system
Since the last change to the computer was the video driver upgrade, it
would be unnecessary to reinstall the entire operating system.
A system administrator is configuring a lab computer that will run five
server VMs at the same time. Which of the following hardware resources
will be the MOST important for this configuration?
❍ A. CPU
❍ B. Storage space
❍ C. Video adapter
❍ D. NIC
The Answer: B. Storage space
Adding five virtual machines to a single device would require as much
storage space as five separate operating systems. Of the available options,
the system storage will be used the most.
The incorrect answers:
A. CPU
The CPU utilizations required by a server can vary, but five servers at low
utilizations would not be as much of a resource requirement as the storage
space for the VMs (Virtual Machines).
C. Video adapter
Servers don’t often require extensive video resources, and some servers
don’t even use a graphical interface. Given what we know in this
question, the video adapter resources are not going to be a large resource
requirement.
D. NIC
The NIC (Network Interface Card) provides the network connectivity for
the virtual machines. Multiple VMs can use the same physical NIC, so
most environments won’t need any additional physical network interfaces.
Rodney, a user in the manufacturing department, would like to have a
local backup of his iPhone data. Which of the following would provide his backup?
❍ A. Download the phone data from iCloud
❍ B. Use iTunes to perform a local backup
❍ C. Connect the iPhone directly to an external storage device
❍ D. Connect using USB and copy the files from File Manager
The Answer: B. Use iTunes to perform a local backup
Apple’s iTunes application can be used to manage iOS devices, and it also
includes a backup and restore feature. Backups can be performed over a
wireless connection or from a directly connected iOS device.
The incorrect answers:
A. Download the phone data from iCloud
iCloud provides a backup process for iOS devices, but it doesn’t provide
direct access to this backup information. Information such as pictures and
contact information is available online, but the full backup is not available
from iCloud.
C. Connect the iPhone directly to an external storage device
Although some iOS devices support copying information to an external
storage device, a full backup cannot be completed by connecting to an
external storage device.
D. Connect using USB and copy the files from File Manager
iOS devices will not appear as a drive in Windows File Manager.
Which of these cloud computing architectures would BEST describe several organizations sharing the same resources?
❍ A. Community
❍ B. IaaS
❍ C. Public
❍ D. Hybrid
The Answer: A. Community
A community cloud model is often used by multiple organizations to
build a pool of resources with their combined financial contributions.
This multi-tenant model provides a shared cloud-based deployment to
organizations with similar goals and objectives.
The incorrect answers:
B. IaaS
IaaS (Infrastructure as a Service) is a cloud deployment model that
provides processing power, memory, and storage. The user of this service
would provide and manage the operating systems and applications.
C. Public
A public cloud-based service is one that is available to anyone on the
Internet.
D. Hybrid
A hybrid cloud deployment model is a combination of both public and
private clouds. Some organizations will deploy services that are used by
anyone on the Internet, but may also require services that would be used
privately by internal users.
The cooling fan controller in a server is failing. The server administrator
has tested possible reasons for the failures and has created a plan for
correcting the issue. Which of the following would be the best NEXT
troubleshooting step?
❍ A. Verify the fan controller is working properly
❍ B. List possible reasons for the controller failure
❍ C. Present the plan to the change control team
❍ D. Test for full functionality
The Answer: C. Present the plan to the change control team
Change control is an important part of the troubleshooting process for any
organization. When the change control committee approves the plan, the
fix can be tested and the issue can be documented.
The incorrect answers:
A. Verify the fan controller is working properly
Although a plan has been created to resolve the issue, the fix has not yet
been applied. The verification of the fix must wait until after the plan has
been implemented.
B. List possible reasons for the controller failure
In this example, the server administrator has already listed possible reasons
and tested them to see if they would resolve the issue. The next step would
be to implement the changes on the server.
D. Test for full functionality
The full functionality of the system shouldn’t occur until after the
resolution has been applied.
A technician has just upgraded the memory on a desktop computer. After
the computer runs for a few minutes, the system locks up completely and
does not respond to keyboard or mouse input. After rebooting, no error
messages are found in Event Viewer. Which of the following would be the BEST next troubleshooting step?
❍ A. Reinstall the operating system
❍ B. Upgrade the BIOS
❍ C. Update device drivers
❍ D. Run hardware diagnostics
The Answer: D. Run hardware diagnostics
Issues that result in the system hanging without any additional
information can be frustrating to troubleshoot. Since there are no error
messages or log entries associated with the issue, the best option would be
to perform a hardware diagnostic and at least confirm that the hardware is
working
as expected.
The incorrect answers:
A. Reinstall the operating system
Without any error messages or log entries, there’s no way to know if the
operating system is the issue. Instead of making such a significant change,
it would be useful to gather more information about the current system
and any potential issues.
B. Upgrade the BIOS
There’s no evidence that the BIOS is associated with these lockup issues,
and it would be unusual for a BIOS to be the root cause of this issue.
Because of these reasons, upgrading the BIOS and making a change to the
computer would not be the best next troubleshooting step.
C. Update device drivers
A bad device driver can certainly cause problems with a system, but
normally there would be an operating system error or Windows Stop
message that would provide more information. Before making any
changes, it would be good to rule out any hardware problems first.
. Which of the following devices makes forwarding decisions based on destination IP address? ❍ A. Repeater ❍ B. Router ❍ C. Hub ❍ D. Managed switch
The Answer: B. Router
A router decides the next hop of an packet based on the packet’s
destination IP (Internet Protocol) address.
The incorrect answers:
A. Repeater
Repeaters are relatively simple devices that receive a signal, regenerate
the signal, and then pass that signal to the next network link. Repeaters
don’t examine the information in the network flow to make a forwarding
decision.
C. Hub
A hub could be considered a multi-port repeater, since it doesn’t examine
any of the data to determine where traffic should be forwarded. A hub
receives data on one interface, and then sends that data to every other
interface on the hub.
D. Managed switch
Both managed and unmanaged switches make forwarding decisions
the same way. A switch examines the destination MAC (Media Access
Control) address in a frame and forwards traffic based on that address. A
switch does not make decisions based on IP address.
A system administrator has been tasked with running an application from
one system architecture on a computer running a completely different
system architecture. Which of the following would BEST describe this
requirement?
❍ A. Virtualization
❍ B. Elevation
❍ C. Emulation
❍ D. Synchronization
The Answer: C. Emulation
The best environment for running an application is the system architecture
in which it was originally designed. However, there may be instances
where the original architecture may be unavailable. In those instances,
it may be possible to emulate the original system architecture on a
completely different computing system.
The incorrect answers:
A. Virtualization
The hypervisor of a virtualized system is managing VMs (Virtual
Machines) that have been designed for that system architecture. For
example, a hypervisor on an Intel-based computer will manage VMs that
are natively designed to operate on an Intel-based system.
B. Elevation
Elevation is an operating system process that allows a user to modify their
effective rights and permissions. This is commonly done by administrators
that will normally run with user-level permissions, but elevate their
account permissions when modifications are required to the operating
system or higher-level processes.
D. Synchronization
Synchronization is the process of duplicating data in different locations.
We often synchronize data across our desktops and mobile devices so
that all of our contacts, emails, and documents are the same across all
platforms.
A user in the accounting department had a new laptop delivered and
installed, but they are reporting that the network throughput seems much
slower than the previous computer. Which of the following would be the
most likely cause of these slow transfer speeds?
❍ A. Incorrect SSID
❍ B. Device is assigned an APIPA address
❍ C. Incorrect gateway configuration
❍ D. Duplex mismatch
❍ E. Device is assigned an RFC 1918 address
The Answer: D. Duplex mismatch
A mismatch of half-duplex and full-duplex will not cause a total
disruption of network communication, but it will cause the network to
have slow performance.
The incorrect answers:
A. Incorrect SSID
The SSID (Service Set Identifier) is the name associated with a wireless
network. An incorrect SSID would not cause performance issues on the
network.
B. Device is assigned an APIPA address
An APIPA (Automatic Private IP Addressing) address is assigned
when a DHCP server is not available. This link-local address can only
communicate to other devices on the same network, but the performance
of that communication would not have slower performance than normal
network data.
C. Incorrect gateway configuration
An incorrect gateway configuration would limit the laptop from
communicating beyond the local network, but it would not commonly
cause the network traffic to perform slower than expected.
E. Device is assigned an RFC 1918 address
An RFC 1918 (Request for Comment document 1918) address is a
private IP address that is commonly assigned to most devices on our local
networks. An RFC 1918 address does not cause a performance issue when
communicating over the network.
What type of network connection is commonly used by DSL? ❍ A. Coax ❍ B. Fiber optic ❍ C. Line-of-sight ❍ D. Twisted pair copper
The Answer: D. Twisted pair copper
DSL (Digital Subscriber Line) networks use the same twisted pair copper
as traditional phone lines.
The incorrect answers:
A. Coax
Coaxial cables are commonly associated with cable television and cable
modem networks.
B. Fiber optic
Fiber optic communication is a common network type for long distance
communication, but fiber optic is not used to bring DSL Internet links
into a home or business.
C. Line-of-sight
Line-of-sight networks are wireless connections that work in a relatively
small regional area. Network types like WiMAX would be categorized as
a line-of-sight network, and DSL networks do not use line-of-sight for
communication.
A system administrator has just built a new server with an eight core
CPU. When viewing information in Windows Task Manager, the utility
shows CPU performance for sixteen different processors. Which of the
following would be the MOST likely reason for this output?
❍ A. Task Manager displays CPU input and output separately
❍ B. The CPU supports hyper-threading
❍ C. The BIOS requires an upgrade to support the newer CPU
❍ D. The CPU is faulty
The Answer: B. The CPU supports hyper-threading
HTT (Hyper-threading Technology) provides additional processing
efficiency by treating a single CPU (Central Processing Unit) as two
separate processors. Although this does not provide twice the performance,
it can increase processing efficiency by fifteen to thirty percent.
The incorrect answers:
A. Task Manager displays CPU input and output separately
Task Manager does not separate CPU input and output into different
metrics or views.
C. The BIOS requires an upgrade to support the newer CPU
Some motherboards may require a BIOS (Basic Input Output System)
upgrade to support newer CPUs, but this requirement is not common and
would not be seen as multiple CPUs in Task Manager.
D. The CPU is faulty
A bad CPU would cause problems during startup or errors during normal
operation. Showing multiple CPUs in Task Manager would not indicate a
faulty CPU.
A network administrator has been asked to control network access to
destination websites based on the URL. Which of the following would
provide this functionality?
❍ A. QoS
❍ B. Whitelisting
❍ C. NAT
❍ D. MAC filtering
The Answer: B. Whitelisting
Whitelisting allows an administrator to limit all access through a device
unless the content has been previously approved and configured in the
device. This is a very restrictive security posture, but it does provide
extensive control of network traffic flows. In this example, the whitelists
are based on the URL (Uniform Resource Locator) of a website,
commonly referenced as the web site address.
The incorrect answers:
A. QoS
QoS (Quality of Service) can be used to set different network priorities
for various application traffic flows. QoS is not commonly used to allow or
disallow access to a particular website.
C. NAT
NAT (Network Address Translation) is used to modify the source
and/or destination IP (Internet Protocol) address of a packet. NAT is not
commonly used to allow or disallow access to a particular website.
D. MAC filtering
MAC (Media Access Control) filtering is a method of limiting access
to network services based on the physical address of the device. MAC
addresses are not used to allow or disallow access to a particular website.
Which of the following would be MOST commonly associated with a KVM switch? ❍ A. DB-9 ❍ B. 802.11 ❍ C. VGA ❍ D. BNC
The Answer: C. VGA
VGA (Video Graphics Array) is a standard video format that’s often used
on KVM (Keyboard/Video/Mouse) switches. USB (Universal Serial Bus)
or PS/2 (Personal System/2) interfaces would be commonly connected to
the keyboard and mouse ports.
The incorrect answers:
A. DB-9
The serial connectivity used over DB-9 (D-subminiature size B, 9 pin) is
usually associated with management ports on switches, router, and other
infrastructure devices. DB-9 interfaces are not used for modern keyboard,
video, or mouse connections.
B. 802.11
The keyboard, video, and mouse connections on a KVM switch are all
wired connections. 802.11 wireless networking is not commonly associated
with a KVM switch.
D. BNC
BNC (Bayonet Neill–Concelman) interfaces are usually associated with
coax or high-end video connections. KVM switches commonly use VGA
or HDMI (High-Definition Multimedia Interface) connections instead of
BNC ports.
A Windows computer is configured to obtain an IP address automatically.
Which of the following would occur if the automatic assignment process
was not working?
❍ A. The IP address would be set to 0.0.0.0
❍ B. A link-local address would be assigned
❍ C. The Ethernet adapter would be disabled
❍ D. The last known good IP address would be used
The Answer: B. A link-local address would be assigned
If a device is configured to obtain an IP address from a DHCP (Dynamic
Host Configuration Protocol) server and the DHCP server is not
available, an APIPA (Automatic Private IP Addressing) address, or linklocal address, would be self-assigned.
The incorrect answers:
A. The IP address would be set to 0.0.0.0
IP address configurations of 0.0.0.0 are not valid for normal network
communication.
C. The Ethernet adapter would be disabled
Although an IP address would not be obtained from a DHCP server, the
operating system would not disable the entire network adapter.
D. The last known good IP address would be used
If the DHCP process was not working, the computer would not assume
that the previous IP address would still be available. Instead, the computer
would assign itself an APIPA address for local communication.
