Computer Network Interview Questions Answers Part-2
26. What is Repeater?
A router is also known as a regenerator. It is an electronic device operating only at the physical layer. It receives the signal before it becomes weak, re-creates the bit pattern, and places the copy back in the link.
27. What is Hub?
It works on the physical layer of the OSI model and is used to link several computers together.
28. What is Switch?
Switch is a device in a network which forwards packets in a network.
29. What is Gateway?
A gateway is a software or hardware that is used to connect the local area network with the internet. A gateway is a network entrance point and a router usually works as a gateway.
30. What is Baseband Technology?
This technology uses digital signals used for both sending and receiving signals on a single channel. It transmits data through wires.
31. What is an IP address?
An IP address is the numeric identity of a node in the network.
32. What is an Intranet?
Only users from the same organization have access to it.
33. What is an Extranet?
The users of the network of the organization may access or use the network application.
34. What is Telnet?
Telnet is a program that allows users to remotely access the system or device in which it is running.
35. What is LDAP (Lightweight Directory Access Protocol)?
When using Active Directory, LDAP (Lightweight Directory Access Protocol) gives you access to directory services.
36. What is Firewall?
The firewall is usually a program that is installed on the server to protect the resources of the network from unauthorized access.
37. What is File Server?
File servers are computers that store and manage files on a network for many users.
38. What is a Web Server?
It responds to requests (from the browser client) for web pages.
39. What are different firewall techniques?
A firewall may use several types of techniques: Packet Filter, Application Gateway, Circuit Level Gateway, and Proxy Server.
40. What is VPN (Virtual Private Network)?
In essence, a VPN (Virtual Private Network) is a private network that connects two networks. It works on the internet as a private wide area network. Internet-based VPNs are less expensive than traditional VPNs and can be accessed from anywhere.
41. What is VoIP (Voice over Internet Protocol)?
A technology that uses IP-based networks such as the Internet or private networks to transmit voice communication is VoIP (Voice over IP).
42. What is Bluetooth Technology?
In short-range wireless communication, Bluetooth uses radio waves. Bluetooth can be found in various mobile phones, laptops, and MP3 players.
43. What is Bit Rate?
Bit rates are the number of bits sent in a second.
44. What is Baud Rate?
The Baud rate is the number of signals per second required to represent those bits.
45. What is Virtual Channel?
It refers to a connection from one source to one destination, although multicast connections are permitted as well. The virtual circuit is also referred to as a virtual channel.
46. What is Unicasting?
A message that is sent from one source node to one destination node is referred to as unicasting.
47. What is Multicasting?
Multicasting is a method of sending a message to one node over another network.
48. What is Broadcasting?
A message that is broadcast to all the m nodes in the network is said to be broadcasting.
49. What is REX (Request to Exit)?
REX (Request to Exit) is a signal that informs the controller that someone has requested to exit from a secure area.
50. What is Bandwidth?
The range of frequencies that a line can handle is known as its bandwidth. Broadband is the upper limit and the lower limit of the range a line can handle.