WorksheetsNetworking Quiz
Total questions: 26
Worksheet time: 13mins
What are two characteristics of fiber-optic cable? (Choose two.)
It is more expensive than UTP cabling is.
It combines the technique of cancellation, shielding, and twisting to protect data.
It is not affected by EMI or RFI.
Each pair of cables is wrapped in metallic foil.
It typically contains 4 pairs of fiber-optic wires.
In addition to the cable length, what two factors could interfere with the communication carried over UTP cables? (Choose two.)
electromagnetic interference
signal modulation technique
size of the network
crosstalk
bandwidth
What is a primary role of the Physical layer in transmitting data on the network?
control data access to the media
create the signals that represent the bits in each frame on to the media
determine the path packets take through the network
provide physical addressing to the devices
Refer to the graphic. What type of cabling is shown?
fiber
STP
coax
UTP
Refer to the graphic. What type of cabling is shown?
fiber
STP
coax
UTP
With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?
the magnetic field around the adjacent pairs of wire
the use of braided wire to shield the adjacent wire pairs
the collision caused by two nodes trying to use the media simultaneously
the reflection of the electrical wave back from the far end of the cable
Which statement describes a characteristic of the frame header fields of the data link layer?
They vary depending on protocols.
They include information on user applications.
They all include the flow control and logical connection fields.
Ethernet frame header fields contain Layer 3 source and destination addresses.
What are three ways that media access control is used in networking? (Choose three.)
Networks with controlled access have reduced performance due to data collisions.
Ethernet utilizes CSMA/CD.
Contention-based access is also known as deterministic.
802.11 utilizes CSMA/CD.
Data link layer protocols define the rules for access to different media.
What type of communication rule would best describe CSMA/CD?
access method
message encapsulation
flow control
message encoding
Which media communication type does not require media arbitration in the data link layer?
full-duplex
half-duplex
controlled access
deterministic
What is the function of the CRC value that is found in the FCS field of a frame?
to verify the physical address in the frame
to verify the integrity of the received frame
to compute the checksum header for the data field in the frame
to verify the logical address in the frame
What is contained in the trailer of a data-link frame?
data
logical address
error detection
physical address
Which two fields or features does Ethernet examine to determine if a received frame is passed to the data link layer or discarded by the NIC? (Choose two.)
minimum frame size
CEF
Frame Check Sequence
source MAC address
auto-MDIX
During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?
The logical address is added.
An IP address is added.
The process port number is added.
The physical address is added.
Which statement is true about the CSMA/CD access method that is used in Ethernet?
Devices involved in a collision get priority to transmit after the backoff period.
When a device hears a carrier signal and transmits, a collision cannot occur.
All network devices must listen before transmitting.
A jamming signal causes only devices that caused the collision to execute a backoff algorithm.
Which advantage does the store-and-forward switching method have compared with the cut-through switching method?
frame error checking
faster frame forwarding
collision detecting
frame forwarding using IPv4 Layer 3 and 4 information
What is one advantage of using the cut-through switching method instead of the store-and-forward switching method?
has a lower latency appropriate for high-performance computing applications
provides the flexibility to support any mix of Ethernet speeds
makes a fast forwarding decision based on the source MAC address of the frame
has a positive impact on bandwidth by dropping most of the invalid frames
What is the auto-MDIX feature?
It enables a device to automatically configure the speed of its interface.
It enables a switch to dynamically select the forwarding method.
It enables a device to automatically configure the duplex settings of a segment.
It enables a device to automatically configure an interface to use a straight-through or a crossover cable.
What are two actions performed by a Cisco switch? (Choose two.)
forwarding frames with unknown destination IP addresses to the default gateway
building a routing table that is based on the first IP address in the frame header
examining the destination MAC address to add new entries to the MAC address table
using the source MAC addresses of frames to build and maintain a MAC address table
utilizing the MAC address table to forward frames via the destination MAC address
What is the purpose of the FCS field in a frame?
to compute the CRC header for the data field
to obtain the MAC address of the sending node
to determine if errors occurred in the transmission and reception
to verify the logical address of the sending node
Which switching method has the lowest level of latency?
fast-forward
store-and-forward
fragment-free
cut-through
When the store-and-forward method of switching is in use, what part of the Ethernet frame is used to perform an error check?
CRC in the trailer
source MAC address in the header
protocol type in the header
destination MAC address in the header
Which frame forwarding method receives the entire frame and performs a CRC check to detect errors before forwarding the frame?
fast-forward switching
fragment-free switching
cut-through switching
store-and-forward switching
Which switching method uses the CRC value in a frame?
store-and-forward
fragment-free
cut-through
fast-forward
A Layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100Base-T network. Which method of memory buffering would work best for this task?
port-based buffering
fixed configuration buffering
level 1 cache buffering
shared memory buffering
What are two examples of the cut-through switching method? (Choose two.)
CRC switching
fast-forward switching
QOS switching
store-and-forward switching
fragment-free switching
