Networking Concepts

Which layer of the OSI model is responsible for end-to-end communication and error recovery?

• Network Layer

• Transport Layer

• Data Link Layer

• Physical Layer

Which protocol operates at the Network Layer of the OSI model?

• TCP

• IP

• FTP

• HTTP

What is the main difference between TCP/IP and the OSI model?

• OSI has 4 layers, while TCP/IP has 7 layers

• TCP/IP is theoretical, while OSI is practical

• TCP/IP combines the OSI session and presentation layers into the application layer

• OSI is used in all modern networks, while TCP/IP is obsolete

Which device operates at Layer 2 (Data Link Layer) of the OSI model?

• Router

• Switch

• Hub

• Gateway

Which topology has a single point of failure that can bring down the entire network?

• Star

• Mesh

• Ring

• Bus

Which of the following networking devices operates at both Layer 2 and Layer 3 of the OSI model?

• Hub

• Router

• Switch

• Bridge

Which transmission media is least affected by electromagnetic interference?

• Coaxial cable

• Fiber optic cable

• Twisted pair cable

• Satellite communication

Which network security measure prevents unauthorized users from accessing private networks?

• Hub

• Firewall

• Repeater

• Switch

Which encoding technique is used to convert digital data into digital signals?

• Amplitude Modulation

• Manchester Encoding

• Frequency Modulation

• Pulse Code Modulation

Which error detection technique uses a parity bit?

• Cyclic Redundancy Check (CRC)

• Checksum

• Parity Check

• Hamming Code