Network Topic 4

What is the primary function of the physical layer in networking?

• To handle application layer protocols

• To provide physical connectivity between networked devices

• To ensure data integrity

• To manage data encryption

Which type of cable is known for its ability to cancel noise interference?

• Optical fiber

• Open wire circuits

• Twisted pair cable

• Coaxial cable

What is a characteristic of optical fiber?

• It is susceptible to electromagnetic interference

• It can carry information at high data rates with low error rates

• It is thicker and heavier than copper wire

• It uses electrical signals for transmission

Which of the following is NOT a type of guided media?

• Coaxial cable

• Radio waves

• Optical fiber

• Twisted pair

What is the purpose of a token in a ring network?

• To increase the network speed

• To serve as a physical connection

• To encrypt data being transmitted

• To control data flow and access

Which type of optical fiber mode allows multiple light sources to be used simultaneously?

• Single Mode

• Step Index Mode

• Graded Index Mode

• Multimode

What is a disadvantage of optical fiber cables?

• Lower data rates compared to copper

• Heavier than coaxial cables

• Difficult to splice and connect

• High susceptibility to electrical interference

What is the main function of the data link layer in relation to the physical layer?

• To handle user interface protocols

• To provide encryption for data

• To manage the transmission of data frames

• To establish connections between different networks

Which type of network topology connects all devices to a central hub?

• Bus Network

• Star Network

• Ring Network

• Mesh Network

What is the primary role of the cladding in optical fiber?

• To transmit light signals

• To protect the core and reflect light back

• To enhance the data rate

• To provide electrical insulation