Chapter 8 Flashcards
Which type of cable run is most often associated with fiber-optic cable? backbone cable horizontal cable patch cable work area cable
backbone cable
In most business LANs, which connector is used with twisted-pair networking cable? BNC RJ-11 RJ-45 Type F
RJ-45
When is a straight-through cable used in a network?
when connecting a router through the console port
when connecting one switch to another switch
when connecting a host to a switch
when connecting a router to another router
when connecting a host to a switch
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 reflection of the electrical wave back from the far end of the cable
the collision caused by two nodes trying to use the media simultaneously
the magnetic field around the adjacent pairs of wire
Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication? Presentation Transport Data Link Physical
Physical
An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device? light injector OTDR TDR multimeter
OTDR
XYZ Company is installing new cable runs on their data network. What two types of cable would most commonly be used for new runs? (Choose two.) coax Cat4 UTP Cat5 UTP Cat6 UTP STP
Cat5 UTP
Cat6 UTP
What is a possible effect of improperly applying a connector to a network cable?
Data will be forwarded to the wrong node.
Data transmitted through that cable may experience signal loss.
An improper signaling method will be implemented for data transmitted on that cable.
The encoding method for data sent on that cable will change to compensate for the improper connection.
Data transmitted through that cable may experience signal loss.
What are three measures of data transfer? (Choose three.) goodput frequency amplitude throughput crosstalk bandwidth
goodput
throughput
bandwidth
Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B? coax cable rollover cable crossover cable straight-through cable
crossover cable
In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling? coax fiber Cat5e UTP Cat6 UTP STP
fiber
Which fiber connector supports full duplex Ethernet?
- (Third one is the correct one)
Which method of signal transmission uses radio waves to carry signals? electrical optical wireless acoustic
wireless
Which characteristics describe fiber optic cable? (Choose two.)
It is not affected by EMI or RFI.
Each pair of cables is wrapped in metallic foil.
It combines the technique of cancellation, shielding and twisting to protect data.
It has a maximum speed of 100 Mbps.
It is the most expensive type of LAN cabling.
It is not affected by EMI or RFI.
It is the most expensive type of LAN cabling.
Which of the following is a characteristic of single-mode fiber-optic cable?
generally uses LEDs as the light source
relatively larger core with multiple light paths
less expensive than multimode
generally uses lasers as the light source
generally uses lasers as the light source
What is considered a benefit of wireless as a media choice?
more host mobility
lower security risks
reduced susceptibility to interference
less impact of the surroundings on the effective coverage area
more host mobility
What characteristic of UTP cable helps reduce the effects of interference?
the metal braiding in the shielding
the reflective cladding around core
the twisting of the wires in the cable
the insulating material in the outer jacket
the twisting of the wires in the cable
What is a primary role of the Physical layer in transmitting data on the network?
create the signals that represent the bits in each frame on to the media
provide physical addressing to the devices
determine the path packets take through the network
control data access to the media
create the signals that represent the bits in each frame on to the media
