End Of Chapter Questions Flashcards
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?
physical layer
data link layer
network layer
presentation layer
physical layer
What type of cable is used to connect a workstation serial port to a Cisco router console port?
coaxial
straight-through
crossover
rollover
rollover
Why are two strands of fiber used for a single fiber optic connection?
The two strands allow data to travel for longer distances without degrading.
They allow for full-duplex connectivity
They prevent crosstalk from causing interference on the connection.
They increase the speed at which the data can travel.
they allow for full-duplex connectivity
Which procedure is used to reduce the effect of crosstalk in copper cables?
twisting opposing circuit wire pairs together.
wrapping the bundle of wires with metallic shielding.
designing a cable infrastructure to avoid crosstalk
interference.
avoiding sharp bends during installation.
requiring proper grounding connections
twisting opposing circuit wire pairs together
What is one advantage of using fiber optic cabling rather than copper cabling?
It is able to be installed around sharp bends.
It is usually cheaper 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 carry signals much farther 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 only has an Ethernet NIC.
The end-user device needs mobility when connecting to the Network.
The end-user device area has a high concentration of RFI.
The end-user device requires a dedicated connection because of performance requirements.
the end-user device needs mobility when connecting to the network
Which type of UTP cable is used to connect to PC to a switch port?
Straight-through
crossover
console
rollover
straight-through
What is the definition of bandwidth?
the measure of usable data transferred over a given period of time.
the amount of data that can flow from one place to another in a given amount of time.
the speed at which bits travel on the network.
the speed of bits across the media over a given period of time.
the amount of data that can flow one place to another in a given amount of time
Which statement correctly describes frame encoding?
it uses the characteristic of one wave to modify another wave.
it converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits.
It transmits data signals along with a clock signal which occurs at evenly spaced time durations.
it generates the electrical, optical, or wireless signals that represent the binary numbers of frame.
it converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits.
What is a characteristic of UTP cabling?
woven copper braid or metallic foil
cancellation
cladding
immunity to electrical hazards
cancellation
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 tchnicians report that the wirelesss 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
the microwave oven
What is the purpose of the OSI physcial layer?
transmitting bits across the local media
performing error detection on received frames
controlling access to media
exchanging frames between nodes over physical network media
transmitting nits across the local media
Which characteristic describes crosstalk?
the distortion of the transmitted messages from signals carried in adjacent wires
the weakening of the network signal over long cable lengths
the distortion of the network signal from fluorescent lighting
the loss of wireless signal over excessive distance from the access point
the distortion of the transmitted messages from signals carried in adjacent wires
What is indicated by the term throughput
the time it takes for a message to get from sender to receiver
the measure of the bits transferred across the media over a given period of time
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
the measure of the bits transferred across the media over a given period of time
Which standards organization oversees development of wireless LAN standards?
TIA
ISO
IANA
IEEE
IEEE
