Networking - MCQ Practice Questions

Which of the following devices operates at Layer 2 of the OSI model?

The TCP/IP model has 4 layers, while the OSI model has 7 layers. Which OSI layers are combined into the TCP/IP Application Layer?

A network packet is traveling through the internet. At which OSI layer would the packet's source and destination IP addresses be read?

Which protocol operates at the Transport Layer and is connectionless?

In the OSI model, what does the Presentation Layer primarily do?

A technician notices that devices can ping each other but cannot access web services. At which OSI layer might the problem exist?

Which OSI layer is responsible for managing access to the shared physical medium?

During network troubleshooting, a frame is found to have an incorrect FCS (Frame Check Sequence). At which layer would this be detected and corrected?

Which of the following statements about the OSI model is correct?

An organization implements end-to-end encryption for all data transfers. At which OSI layer is this encryption most commonly implemented?

What is the primary difference between a hub and a switch in terms of OSI layers?

In a scenario where a network admin needs to monitor traffic patterns and identify applications consuming bandwidth, at which layer should deep packet inspection (DPI) be implemented?

A firewall configured to block all traffic on port 443 is operating at which OSI layer?

Consider a scenario where VoIP quality degrades due to excessive latency. Which of the following OSI layer mechanisms would BEST address this issue?

Which of the following is NOT a function of the Network Layer in the OSI model?

In a complex network troubleshooting scenario, packets are being dropped at high rates despite connectivity. Which combination of layers should be investigated?

A network service requires authentication, encryption, and session management. These functions span across which OSI layers?

In the OSI model, which layer is responsible for converting digital data into electrical signals for transmission over physical media?

A network administrator observes that devices on different subnets cannot communicate despite being connected to the same router. The devices have valid IP addresses and can ping the router. At which OSI layer should the administrator focus troubleshooting, and what is the most likely issue?

Consider a scenario where a company implements a network segmentation strategy using VLANs to isolate sensitive financial data. An employee in the accounting department cannot access a server despite having proper credentials. The network switch shows the correct VLAN assignment. At which layer is the inter-VLAN routing issue most likely to occur, and what fundamental OSI principle is being tested?