Network exam interview questions

Question 1

What is a Network?

Answer 1

A set of devices connected to each other using a physical transmission medium.

Question 2

What is a Node?

Answer 2

A node is a point where a connection is established. It is a network component that is used to send, receive and forward the electronic information.

Question 3

What is Network Topology?

Answer 3

Physical layout of the computer network and it defines how the computers, devices, cables, etc are connected to each other.

Question 4

What are Routers?

Answer 4

The router is a network device that connects two or more network segments. It is used to transfer information from the source to the destination

Question 5

What is the OSI reference model?

Answer 5

Open Source Interconnection (OSI) Reference model that defines how applications can communicate with each other over a networking system.

Question 6

What are the layers in OSI Reference Models? Describe each layer briefly

Answer 6

Physical, CAT 5- 6, Ethernet, fiber, cable converts data bits
Data Link - Ethernet data packets and encoded and decoded into bits and
Network - works with packet, filtering, datagrams
Transport - TCP/UDP segments
Session - manages connections between computers
Presentation - compression/encryption SSL
Application - applications such as HTTP, File transfer, email

Question 7

What is a Firewall?

Answer 7

Network security system to protect computer networks from unauthorized access.