Quiz on Physical Layer and Data Link Layer

What is the primary purpose of the Physical Layer in the OSI model?

• Network security

• Error correction

• Transmission of raw data bits

• Data encryption

Which protocol defines wired LAN transmission over twisted pair cables?

• DSL (Digital Subscriber Line)

• Ethernet (IEEE 802.3)

• Bluetooth (IEEE 802.15.1)

• Wi-Fi (IEEE 802.11)

What type of cable is most commonly used in Ethernet networks?

• Unshielded Twisted Pair (UTP)

• Fiber Optic Cable

• Coaxial Cable

• Shielded Twisted Pair (STP)

Which of the following is a feature of Fiber Optic Communication?

• Extremely high bandwidth

• Low bandwidth

• High susceptibility to interference

• Limited distance

What does the acronym CSMA/CD stand for?

• Control Sense Multiple Access with Collision Avoidance

• Carrier Signal Multiple Access with Collision Avoidance

• Control Signal Multiple Access with Collision Detection

• Carrier Sense Multiple Access with Collision Detection

Which wireless technology operates at 2.4 GHz and is used for short-range communication?

• Wi-Fi

• Bluetooth

• NFC

• Zigbee

What is the maximum speed supported by Bluetooth 5.0?

• 1 Mbps

• 3 Mbps

• 50 Mbps

• 100 Mbps

Which layer of the OSI model is responsible for error detection and correction?

• Transport Layer

• Data Link Layer

• Physical Layer

• Network Layer

What is the function of the Media Access Control (MAC) sublayer?

• Error detection

• Framing

• Addressing and frame delimitation

• Flow control

Which of the following is NOT a type of twisted pair cable?

• Unshielded Twisted Pair (UTP)

• Shielded Twisted Pair (STP)

• Coaxial Cable

• Cat 6 Cable