WorksheetsNWC204
Total questions: 59
Worksheet time: 32mins
During a routine inspection, a technician discovered that software that was installed on a computer was secretly collecting data about websites that were visited by users of the computer. Which type of threat is affecting this computer?
DoS attack
identity theft
zero-day attack
spyware
Which term refers to a network that provides secure access to the corporate offices by suppliers, customers and collaborators?
Internet
extendednet
intranet
extranet
A large corporation has modified its network to allow users to access network resources from their personal laptops and smart phones. Which networking trend does this describe?
bring your own device
online collaboration
cloud computing
video conferencing
What is an ISP?
It is a networking device that combines the functionality of several different networking devices in one.
It is an organization that enables individuals and businesses to connect to the Internet.
It is a standards body that develops cabling and wiring standards for networking.
It is a protocol that establishes how computers within a local network communicate.
In which scenario would the use of a WISP be recommended?
a farm in a rural area without wired broadband access
an apartment in a building with cable access to the Internet
an Internet cafe in a city
any home with multiple wireless devices
What characteristic of a network enables it to quickly grow to support new users and applications without impacting the performance of the service being delivered to existing users?
accessibility
reliability
quality of service
scalability
A college is building a new dormitory on its campus. Workers are digging in the ground to install a new water pipe for the dormitory. A worker accidentally damages a fiber optic cable that connects two of the existing dormitories to the campus data center. Although the cable has been cut, students in the dormitories only experience a very short interruption of network services. What characteristic of the network is shown here?
security
integrity
scalability
quality of service (QoS)
fault tolerance
What are two characteristics of a scalable network? (Choose two.)
grows in size without impacting existing users
is not as reliable as a small network
easily overloaded with increased traffic
suitable for modular devices that allow for expansion
offers limited number of applications
Which two Internet connection options do not require that physical cables be run to the building? (Choose two.)
dedicated leased line
DSL
dialup
satellite
cellular
What type of network must a home user access in order to do online shopping?
an intranet
the Internet
an extranet
a local area network
How does BYOD change the way in which businesses implement networks?
BYOD requires organizations to purchase laptops rather than desktops.
BYOD users are responsible for their own network security, thus reducing the need for organizational security policies.
BYOD devices are more expensive than devices that are purchased by an organization.
BYOD provides flexibility in where and how users can access network resources.
What is the Internet?
It is a private network for an organization with LAN and WAN connections.
It provides network access for mobile devices.
It provides connections through interconnected global networks.
It is a network based on Ethernet technology.
What are two functions of end devices on a network? (Choose two.)
They are the interface between humans and the communication network.
They filter the flow of data to enhance security.
They direct data over alternate paths in the event of link failures.
They provide the channel over which the network message travels.
They originate the data that flows through the network.
Which device performs the function of determining the path that messages should take through internetworks?
a router
a web server
a firewall
a DSL modem
An employee wants to access the network of the organization remotely, in the safest possible way. What network feature would allow an employee to gain secure remote access to a company network?
VPN
BYOD
IPS
ACL
Which statement is true about the running configuration file in a Cisco IOS device?
It is automatically saved when the router reboots.
It affects the operation of the device immediately when modified.
It should be deleted using the erase running-config command.
It is stored in NVRAM.
Which two statements are true regarding the user EXEC mode? (Choose two.)
All router commands are available.
The device prompt for this mode ends with the ">" symbol.
Global configuration mode can be accessed by entering the enable command.
Only some aspects of the router configuration can be viewed.
Interfaces and routing protocols can be configured.
Which type of access is secured on a Cisco router or switch with the enable secret command?
virtual terminal
console line
AUX port
privileged EXEC
What is the default SVI on a Cisco switch?
VLAN1
VLAN999
VLAN99
VLAN100
When a hostname is configured through the Cisco CLI, which three naming conventions are part of the guidelines? (Choose three.)
the hostname should contain no spaces
the hostname should end with a special character
the hostname should be written in all lower case characters
the hostname should be fewer than 64 characters in length
the hostname should begin with a letter
What is the function of the shell in an OS?
It provides dedicated firewall services.
It provides the intrusion protection services for the device.
It interfaces between the users and the kernel.
It interacts with the device hardware.
A router with a valid operating system contains a configuration file stored in NVRAM. The configuration file has an enable secret password but no console password. When the router boots up, which mode will display?
global configuration mode
privileged EXEC mode
user EXEC mode
setup mode
An administrator has just changed the IP address of an interface on an IOS device. What else must be done in order to apply those changes to the device?
Nothing must be done. Changes to the configuration on an IOS device take effect as soon as the command is typed correctly and the Enter key has been pressed.
Copy the running configuration to the startup configuration file.
Copy the information in the startup configuration file to the running configuration.
Reload the device and type yes when prompted to save the configuration.
Which memory location on a Cisco router or switch will lose all content when the device is restarted?
flash
RAM
ROM
NVRAM
Why would a technician enter the command copy startup-config running-config?
to copy an existing configuration into RAM
to make a changed configuration the new startup configuration
to save an active configuration to NVRAM
to remove all configurations from the switch
Which functionality is provided by DHCP?
automatic assignment of an IP address to each host
translation of IP addresses to domain names
end-to-end connectivity test
remote switch management
Which two functions are provided to users by the context-sensitive help feature of the Cisco IOS CLI? (Choose two.)
displaying a list of all available commands within the current mode
determining which option, keyword, or argument is available for the entered command
selecting the best command to accomplish a task
providing an error message when a wrong command is submitted
allowing the user to complete the remainder of an abbreviated command with the TAB key
Which memory location on a Cisco router or switch stores the startup configuration file?
NVRAM
flash
ROM
RAM
To what subnet does the IP address 10.1.100.50 belong if a subnet mask of 255.255.0.0 is used?
10.1.0.0
10.1.100.0
10.1.100.32
10.0.0.0
Which three acronyms/initialisms represent standards organizations? (Choose three.)
IEEE
MAC
IANA
TCP/IP
OSI
IETF
What type of communication will send a message to all devices on a local area network?
broadcast
unicast
allcast
multicast
In computer communication, what is the purpose of message encoding?
to convert information to the appropriate form for transmission
to interpret information
to negotiate correct timing for successful communication
to break large messages into smaller frames
Which message delivery option is used when all devices need to receive the same message simultaneously?
broadcast
unicast
multicast
duplex
What are two benefits of using a layered network model? (Choose two.)
It assists in protocol design.
It prevents technology in one layer from affecting other layers.
It speeds up packet delivery.
It prevents designers from creating their own model.
It ensures a device at one layer can function at the next higher layer.
What is the purpose of protocols in data communications?
providing the rules required for a specific type of communication to occur
specifying the device operating systems that will support the communication
dictating the content of the message sent during communication
specifying the bandwidth of the channel or medium for each type of communication
Which logical address is used for delivery of data to a remote network?
source MAC address
destination MAC address
destination IP address
destination port number
source IP address
What is the general term that is used to describe a piece of data at any layer of a networking model?
protocol data unit
segment
frame
packet
Which two protocols function at the internet layer? (Choose two.)
POP
ICMP
BOOTP
IP
PPP
Which layer of the OSI model defines services to segment and reassemble data for individual communications between end devices?
application
presentation
network
transport
session
Which type of communication will send a message to a group of host destinations simultaneously?
anycast
broadcast
multicast
unicast
What process is used to receive transmitted data and convert it into a readable message?
flow control
access control
encapsulation
decoding
What is done to an IP packet before it is transmitted over the physical medium?
It is encapsulated into a TCP segment.
It is encapsulated in a Layer 2 frame.
It is tagged with information guaranteeing reliable delivery.
It is segmented into smaller individual pieces.
What process is used to place one message inside another message for transfer from the source to the destination?
decoding
access control
flow control
encapsulation
A web client is sending a request for a webpage to a web server. From the perspective of the client, what is the correct order of the protocol stack that is used to prepare the request for transmission?
HTTP, IP, TCP, Ethernet
HTTP, TCP, IP, Ethernet
Ethernet, IP, TCP, HTTP
Ethernet, TCP, IP, HTTP
A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?
network layer
data link layer
presentation layer
physical layer
What type of cable is used to connect a workstation serial port to a Cisco router console port?
straight-through
coaxial
crossover
rollover
Why are two strands of fiber used for a single fiber optic connection?
They allow for full-duplex connectivity.
The two strands allow the data to travel for longer distances without degrading.
They prevent crosstalk from causing interference on the connection.
They increase the speed at which the data can travel.
Which procedure is used to reduce the effect of crosstalk in copper cables?
twisting opposing circuit wire pairs together
requiring proper grounding connections
avoiding sharp bends during installation
wrapping the bundle of wires with metallic shielding
designing a cable infrastructure to avoid crosstalk interference
What is one advantage of using fiber optic cabling rather than copper cabling?
It is easier to terminate and install than copper cabling.
It is able to carry signals much farther than copper cabling.
It is able to be installed around sharp bends.
It is usually cheaper than copper cabling.
A network administrator is designing a new network infrastructure that includes both wired and wireless connectivity. Under which situation would a wireless connection be recommended?
The end-user device needs mobility when connecting to the network.
The end-user device requires a dedicated connection because of performance requirements.
The end-user device area has a high concentration of RFI.
The end-user device only has an Ethernet NIC.
Which type of UTP cable is used to connect a PC to a switch port?
rollover
straight-through
crossover
console
What is the definition of bandwidth?
the amount of data that can flow from one place to another in a given amount of time
the speed of bits across the media over a given period of time
the measure of usable data transferred over a given period of time
the speed at which bits travel on the network
Which statement correctly describes frame encoding?
It transmits data signals along with a clock signal which occurs at evenly spaced time durations.
It converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits.
It uses the characteristic of one wave to modify another wave.
It generates the electrical, optical, or wireless signals that represent the binary numbers of the frame.
What is a characteristic of UTP cabling?
cladding
immunity to electrical hazards
cancellation
woven copper braid or metallic foil
A wireless LAN is being deployed inside the new one room office that is occupied by the park ranger. The office is located at the highest part of the national park. After network testing is complete, the technicians report that the wireless LAN signal is occasionally affected by some type of interference. What is a possible cause of the signal distortion?
the large number of trees that surround the office
the number of wireless devices that are used in the wireless LAN
the elevated location where the wireless LAN was installed
the microwave oven
What is the purpose of the OSI physical layer?
controlling access to media
transmitting bits across the local media
exchanging frames between nodes over physical network media
performing error detection on received frames
Which characteristic describes crosstalk?
the loss of wireless signal over excessive distance from the access point
the weakening of the network signal over long cable lengths
the distortion of the network signal from fluorescent lighting
the distortion of the transmitted messages from signals carried in adjacent wires
What is indicated by the term throughput?
the measure of the bits transferred across the media over a given period of time
the time it takes for a message to get from sender to receiver
the guaranteed data transfer rate offered by an ISP
the measure of the usable data transferred across the media
the capacity of a particular medium to carry data
Which standards organization oversees development of wireless LAN standards?
IANA
ISO
IEEE
TIA
