40 Questions
What is the primary function of the Physical Layer?
To provide the means to transport bits across network media
What type of connection requires devices to be connected to a wireless access point (AP) or wireless router?
Wireless connection
What device connects a device to a network?
Network Interface Card (NIC)
What is the main function of the physical layer in the OSI model?
To encode the frames and create the electrical, optical, or radio wave signals
Which organization defines the services and protocols in the TCP/IP suite?
Internet Engineering Task Force (IETF)
What is received by either an end device or an intermediate device?
Encoded bits
What are the three functional areas addressed by Physical Layer Standards?
Physical Components, Encoding, and Signaling
What is the name of the model that the Physical Layer is part of?
OSI model
What is the purpose of the Physical Layer in establishing network communications?
To establish a physical connection to a local network
Who develops the electronic circuitry, media, and connectors in the physical layer?
Electrical and Communications Engineers
What is the primary responsibility of the destination node physical layer?
To retrieve individual signals from the media and restore them to their bit representations
What is represented on a medium by the sending node and interpreted on a medium by the receiving node?
Data being transferred over a network
What is accepted by the Physical Layer from the Data Link Layer?
A complete frame
What are the hardware components specified in standards associated with the physical layer?
NICs, interfaces, and connectors
What is the last step in the encapsulation process?
The bits are sent over the physical medium
What is the primary focus of the physical layer?
Designing and building electronic circuitry and media
What is the capacity of a medium to carry data?
Bandwidth
What determines the practical bandwidth of a network?
Physical media properties, current technologies, and the laws of physics
What is the unit of bandwidth that is equivalent to 1,000,000,000 bps?
Gbps
What is the term used to describe the measure of the time delay between the transmission and reception of a signal?
Latency
What are the terms used to measure the quality of bandwidth?
Latency, throughput, and goodput
What is the unit of bandwidth that is equivalent to 1,000 bps?
Kbps
What is the unit of bandwidth that is equivalent to 10^9 bps?
Gbps
What is the unit of bandwidth that is equivalent to 10^12 bps?
Tbps
What is the primary function of Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) protocol in Wi-Fi?
To ensure the radio channel is clear before transmitting
What is the primary use of Zigbee (IEEE 802.15.4)?
Low data-rate, low power-consumption communications for IoT applications
What is the main function of a Wireless Access Point (AP)?
To concentrate wireless signals from users and connect to the existing copper-based network infrastructure
What is the main function of a Wireless NIC Adapter?
To provide wireless communication to network hosts
What is the primary purpose of WiMAX (IEEE 802.16)?
To provide broadband wireless access using a point-to-multipoint topology
What is the primary concern for Network Administrators in WLANs?
Developing and applying stringent security policies and processes
What is the primary function of Bluetooth (IEEE 802.15)?
To provide wireless personal area network for short-range devices
What is the primary function of a home and small business wireless router?
To integrate router, switch, and access point functions
What is the primary advantage of fiber-optic cabling over copper cabling?
It transmits data over longer distances at higher bandwidth
What is the purpose of twisting opposing circuit pair wires together in copper cabling?
To mitigate crosstalk
What is the primary difference between single-mode fiber and multimode fiber?
The size of the core and the type of light source used
What is the result of increased dispersion in multimode fiber?
Increased loss of signal strength
What is the primary use of fiber-optic cabling in network infrastructure?
As backbone cabling for high-traffic, point-to-point connections
What is the purpose of using metallic shielding and grounding in copper cabling?
To reduce electromagnetic interference and radio-frequency interference
What is the maximum distance that multimode fiber can transmit data?
550 meters
What is the type of light source used in multimode fiber?
LED
Learn about the physical layer of the OSI model, its role in network communication, and its functions in representing data on a medium. Understand the importance of the physical layer in the OSI model and TCP/IP model. Prepare to test your knowledge!
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