Platform(Module 2) Flashcards
Network data transfer works by modulating the properties of a transmission medium to encode a signal. Which of the following BEST describes that process?
- The physical infrastructure, such as cables and switches, used to transmit data in a network
- The process of converting digital signals into analog signals for transmission over telephone lines
- The transmission of signals as electric current, infrared light, or radio waves
- A method of securing network data by encrypting the information before transmission
The transmission of signals as electric current, infrared light, or radio waves
Which of the following BEST describes 10BASE-T network cabling?
- Operates at 100 Mbps (100), uses broadband signal transmission (BROAD), and utilizes fiber optic cabling
- Works at 10 Mbps (10), uses a baseband signal (BASE), and runs over twisted pair copper cabling
- Functions at 1 Gbps (1000), employs baseband signal transmission (BASE), and is implemented with coaxial cabling
- Delivers a speed of 10 Gbps (10G), uses a broadband signal (BROAD), and relies on wireless transmission
Works at 10 Mbps (10), uses a baseband signal (BASE), and runs over twisted pair copper cabling
Which of the following correctly describes the components of the convention used in naming Ethernet media specifications? (Select three.)
- A designator for the media type
- The maximum allowable distance between devices
- The speed or bit rate in megabits per second (Mbps) or gigabits per second (Gbps)
- The type of error correction used
- The signal mode (baseband or broadband)
- The maximum number of connections supported
- The color coding of the cabling
A designator for the media type, The speed or bit rate in megabits per second (Mbps) or gigabits per second (Gbps), The signal mode (baseband or broadband)
What type of transmission is available with the contention-based MAC system utilized by Ethernet?
- Half-duplex transmission
- Full-duplex transmission
- Simplex transmission
- Multiplex transmission
Half-duplex transmission
In a contention-based MAC system, such as that used by Ethernet, what are the consequences of adding more nodes to the network? (Select two.)
- The effective data rate is reduced
- The network becomes immune to eavesdropping
- Collisions become more frequent
- The network automatically switches to a token ring MAC system
- All devices on the network receive an automatic speed upgrade
The effective data rate is reduced, Collisions become more frequent
A company is upgrading its legacy network infrastructure. The existing network is based on 100BASE-TX Fast Ethernet with a mix of hubs and switches. The IT manager wants to improve network performance while maintaining compatibility with older devices that only support 10 Mbps Ethernet interfaces. What feature should the IT manager ensure the new network devices support to maintain compatibility with older devices?
- Full-duplex transmissions
- Autonegotiation
- Use of hubs instead of switches
- Higher frequency signaling
Autonegotiation
A network administrator notices that the data transfer rates between devices in a 100BASE-TX Fast Ethernet network are not reaching the expected 100 Mbps. The network uses switches, and all devices support Fast Ethernet. What could the network administrator enable to improve the data transfer rates to the expected 100 Mbps?
- Autonegotiation on all devices
- Full-duplex mode on all devices
- Replace switches with hubs
- Replace all Cat 5 cables with fiber optic cables
Full-duplex mode on all devices
A school is planning to expand its network to accommodate new classrooms and administrative offices. The existing network infrastructure is based on the 100BASE-TX Fast Ethernet standard with a combination of hubs and switches, utilizing both UTP-based horizontal links and fiber optic backbones. What should the IT team prioritize to ensure the successful integration of the new workstations into the existing 100BASE-TX Fast Ethernet network in the MOST effective way?
- Use fiber optic cables for all new horizontal links
- Extend the fiber optic backbone to each new workstation
- Replace all existing hubs with switches to reduce collision domains
- Implement autonegotiation on all network devices
Replace all existing hubs with switches to reduce collision domains
For what reason might a company deploy 10/40 GbE Ethernet in its network?
- To avoid using fiber optic cable
- To reduce overall network costs
- To support very high bandwidth data transfers
- To meet the standard for all new installations
To support very high bandwidth data transfers
What is the main advantage of using fiber optic cable over copper cable?
- More durable
- Higher bandwidth
- Easier to splice
- Lower cost
Higher bandwidth
What is the primary purpose of twisting the pairs in an unshielded twisted pair (UTP) cable?
- To increase the cable’s thickness
- To make the cable more flexible
- To reduce external interference and crosstalk
- To color-code the cable for easier identification
To reduce external interference and crosstalk
Which type of conductor wire is typically used for cables that run behind walls or through ducts?
- Coaxial
- Stranded
- Fiber optic
- Solid
Solid
What is the main difference between screened cabling and fully shielded cabling?
- Screened cabling uses a braided outer screen only.
- Fully shielded cabling has no shielding at all.
- Fully shielded cabling uses foil-shielded pairs without an outer shield.
- Screened cabling has one thin outer foil shield around all pairs.
Screened cabling has one thin outer foil shield around all pairs.
Which organizations have created categories of cable standards for twisted pair to simplify the selection of a suitable quality cable?
- IEEE and IETF
- ISO and IEC
- ANSI and TIA/EIA
- ITU and ETSI
ANSI and TIA/EIA
In a telephone system, what is the primary function of the center two contacts in an RJ11 connector?
- They are reserved for future technological advancements.
- They enhance the signal quality for internet connections.
- They are used to provide power to the telephone unit.
- They carry the dial tone and voice circuit.
They carry the dial tone and voice circuit.
Which of the following are true characteristics of RJ45 connectors? (Select two.)
- They support up to 8 positions and 8 contacts.
- They have a plastic retaining clip.
- They are designed for use with single-pair copper cables.
- They are identical in form to RJ11 connectors.
- They are primarily used for telephone systems.
They support up to 8 positions and 8 contacts., They have a plastic retaining clip.
Which of the following statements is true regarding the use of plenum-rated cables in place of riser-rated cables?
- Using plenum-rated cables in place of riser-rated cables reduces the overall bandwidth of the network.
- Plenum-rated cables can never be used in place of riser-rated cables due to their different fire safety standards.
- Riser-rated and plenum-rated cables are interchangeable with no restrictions.
- Plenum-rated cables can be used in place of riser-rated cables, but not vice versa.
Plenum-rated cables can be used in place of riser-rated cables, but not vice versa.
You’re adding new wires in your building for some new offices. The building has a false ceiling that holds the lights and provides an air path for heating and air conditioning. You’d like to run your Ethernet cables in this area. Which type of cable must you use?
- Plenum-rated cable
- Cat 5e or Cat 6a cables
- STP cables
- Fiber optic cables
Plenum-rated cable
Which of the following are typical uses of RG-59 coax cable? (Select two.)
- In-vehicle networking
- Long-distance telecommunication
- Audio/video applications
- Closed circuit TV (CCTV)
- High-speed internet connections
Audio/video applications, Closed circuit TV (CCTV)
Which of the following is a typical use of twinaxial cables?
- Outdoor lighting systems
- Automotive audio systems
- Residential telephone wiring
- Data center interconnects
Data center interconnects
Which of the following are the purposes of entrance facilities in a structured cabling scheme? (Select two.)
- To mark the point at which external cabling is joined to internal cabling
- To act as a primary storage area for network documentation and manuals
- To serve as the main distribution frame (MDF) for the entire building
- To join the local exchange carrier (LEC)’s network and for inter-building communications
- To house the building’s wireless networking equipment exclusively
To mark the point at which external cabling is joined to internal cabling, To join the local exchange carrier (LEC)’s network and for inter-building communications
What are the requirements for horizontal cabling in a structured cabling scheme? (Select two.)
- Must be within 90 m (295 feet) cabling distance of each wall port if using copper cabling.
- Must be made of fiber optic cable exclusively.
- Requires a wireless booster every 50 m to maintain signal strength.
- Must connect user work areas to an intermediate distribution frame (IDF).
- Can only be installed in ceiling spaces, not wall ducts.
Must be within 90 m (295 feet) cabling distance of each wall port if using copper cabling, Must connect user work areas to an intermediate distribution frame (IDF)
Which of the following statements correctly describes the wiring configuration for T568A termination?
- The brown pair is wired to pins 3 and 6.
- The green pair is wired to pins 1 and 2.
- The blue pair is wired to pins 3 and 6.
- The orange pair is wired to pins 1 and 2.
The green pair is wired to pins 1 and 2.
What is a primary reason for an organization to choose one termination standard (T568A or T568B) over the other and stick with it?
- To avoid compatibility and connectivity issues between devices
- To comply with international laws requiring the use of a single standard
- To ensure that all cables are the same color
- To reduce the cost of Ethernet cables
To avoid compatibility and connectivity issues between devices
What type of terminals are found at the rear of a patch panel for cable termination?
- USB ports
- Insulation-displacement connection (IDC) terminals
- RJ-11 terminals
- Coaxial cable connectors
Insulation-displacement connection (IDC) terminals
What is used to connect a port on a patch panel to another network port, typically a switch port housed in the same rack?
- RJ-45 patch cord
- Fiber optic cable
- Power line
- HDMI cable
RJ-45 patch cord
During a structured cable installation in an office renovation, you notice that the cable runs are in close proximity to several electrical power cables and fluorescent lights. What is the MOST likely impact of this installation practice on the network’s performance?
- Improved cable flexibility and durability because of the proximity to light sources
- Electromagnetic interference (EMI) causing potential degradation of data transmission
- Increased data transmission speed due to the warmth from the power cables
- Enhanced cable aesthetics, making the installation more visually appealing
Electromagnetic interference (EMI) causing potential degradation of data transmission
When installing structured cabling, why is it important to leave a service loop at both ends of the cable run?
- To increase the tension on the cable, ensuring a tighter fit
- To provide extra cable length for future reconnections or changes
- To make the installation look more professional and organized
- To ensure that the cable can be easily pulled out for recycling
To provide extra cable length for future reconnections or changes
Which tool is used to create a patch cord by fixing a plug to a cable?
- Cable tester
- Punch down tool
- Cable crimper
- Wire stripper
Cable crimper
Which tool is used to terminate fixed cable by fixing conductors into an IDC?
- Cable crimper
- Punch down tool
- Wire stripper
- Cable tester
Punch down tool
Multi-mode fiber is designed to operate at which of the following wavelengths?
- 850 nm and 1310 nm
- 850 nm and 1300 nm
- 1310 nm and 1550 nm
- 1300 nm and 1550 nm
850 nm and 1300 nm
Which of the following is true about single-mode fiber optic network cabling?
- It’s optimized for 850 nm and 1300 nm light sources.
- It has shorter segment lengths than multi-mode fiber optic cabling.
- It’s less expensive than multi-mode fiber optic cabling.
- Its central core is smaller than the standard multi-mode fiber optic cabling core.
Its central core is smaller than the standard multi-mode fiber optic cabling core.
Which fiber optic connector is known for its small form factor and is widely adopted for Gigabit Ethernet and 10/40 GbE?
- Local Connector (LC)
- Straight Tip (ST)
- Mini-MT
- Subscriber Connector (SC)
Local Connector (LC)
A military installation is upgrading its network infrastructure. Which fiber optic connector type developed by AT&T used to be very common for multimode networks in commercial or military installations due to its quick-connecting bayonet, but is no longer considered standard when retrofitting?
- Mechanical Transfer Registered Jack (MTRJ)
- Subscriber Connector (SC)
- Local Connector (LC)
- Straight Tip (ST)
Straight Tip (ST)
You need to replace a fiber optic cable that’s connecting two switches together. You inspect the existing cable and determine that it uses LC connectors. You also notice that the cable’s ferrule has a slight slant to it. Which polish grade should you use to replace the existing cable?
- Physical Contact polish
- Angled Physical Contact polish
- Ultra Physical Contact polish
- Flat Physical Contact polish
Angled Physical Contact polish
How can you identify transmitted optical signals when working with fiber optic patch cords?
- By listening for a distinct sound emitted by the fiber optic cable
- By observing bright white spots through a smartphone camera
- By measuring the weight of the fiber optic cable
- By feeling the temperature change on the surface of the cable
By observing bright white spots through a smartphone camera
What does the TIA/EIA cabling standard require for fiber patch cord polarity?
- No requirement for crossover in the link elements
- An even number of elements in the link, such as two patch cords and two permanent links
- An odd number of elements in the link, such as two patch cords and a permanent link
- A direct connection without the use of patch cords
An odd number of elements in the link, such as two patch cords and a permanent link
What is a characteristic feature of Ultra Physical Contact (UPC) finishing type for fiber optic connectors?
- UPC connectors are polished at an angle to minimize back reflection.
- UPC connectors have a matte finish to enhance signal transmission.
- UPC connectors are polished to a higher standard than PC, reducing back reflection.
- UPC connectors do not require polishing as they use a basic contact finish.
UPC connectors are polished to a higher standard than PC, reducing back reflection.
What type of cable is used to complete the link from the wall port to the Network Interface Card (NIC) and from the patch panel to the switch port in a fiber optic network?
- Fiber patch cable
- Coaxial cable
- Twisted pair cable
- HDMI cable
Fiber patch cable
What is the primary purpose of using fiber distribution panels in a fiber optic network?
- To enhance the speed of data transmission over the network
- To convert electrical signals into optical signals
- To increase the signal strength of the fiber optic cables
- To provide a centralized location for connecting and managing fiber optic cables
To provide a centralized location for connecting and managing fiber optic cables
