Free Networking and Internet MCQs with Answers

31. In the following list of devices, which device is used in datalink layer?

• A. Repeaters
• B. Routers
• C. Application gateway
• D. Bridge

Explanation: A bridge operates at the OSI data-link layer and forwards frames using MAC addresses. Repeaters work at the physical layer, while routers work at the network layer.

32. In which mode can the computers that are associated send frames directly to each other?

• A. Adhoc mode
• B. Infrastructure mode
• C. Structured mode
• D. Anonymous mode

Explanation: In ad hoc mode, wireless devices communicate directly with one another without requiring an access point. Infrastructure mode normally sends communication through a wireless access point.

33. The Network is overloaded with enormous data sent by many computers within the network. The inability of the network to deliver the data is termed as __________ .

• A. Access control
• B. Congestion
• C. Error propagation
• D. Deadlock

Explanation: Congestion occurs when traffic offered to a network exceeds its capacity, causing delays, packet loss, or inability to deliver data. Deadlock is a resource-waiting condition rather than ordinary network overload.

34. In IT networking, which of the following device is used in physical layer?

• A. Repeater
• B. Router
• C. Transport Gateway
• D. Bridge

Explanation: A repeater operates at the physical layer by regenerating and retransmitting signals. Routers and bridges work at higher layers, while a transport gateway is not a standard physical-layer device.

35. A collection of computers connected together is called______?

• A. Processing
• B. Network
• C. Chatting
• D. Centralized System

Explanation: A network is a group of computers and other devices connected so they can communicate and share resources. Processing and chatting describe activities, not the connected system itself.

36. Servers are computers that provide resources to other computers connected to a___________?

• A. Network
• B. Mainframe
• C. Supercomputer
• D. Client

Explanation: A server provides files, applications or other resources to computers connected to a network. The computers requesting those resources are clients.

37. What is the last step in data encapsulation ?

• A. User information is changed into data.
• B. Frames are placed into bits
• C. Segments are changed into datagram and packets.
• D. Packets are placed into logical frame.

Explanation: Encapsulation proceeds from data to segments, packets, frames, and finally bits for transmission over the physical medium. Therefore, placing frames into bits is the last listed step.

38. How much headings in HTML?

• A. 2
• B. 4
• C. 6
• D. None of these

Explanation: HTML provides six heading levels, from h1, the most important, through h6, the least important. These tags structure headings rather than merely changing font size.

39. which layer of OSI model used by router?

• A. layer 2
• B. layer 4
• C. layer 3
• D. All of above

Explanation: A router makes forwarding decisions using logical IP addresses, which is the main function of OSI Layer 3, the network layer. Layer 2 switching is primarily associated with bridges and switches.

40. E-mail Stand for____________?

• A. Electronic mail
• B. External mail
• C. Electronic Messaging Advice and Information
• D. Both A and C

Explanation: E-mail is short for electronic mail, meaning messages sent electronically through a communications network. The expanded phrase in option C is not the standard meaning of e-mail.