This video on cybersecurity interview questions part 1 will focus on the top networking questions and answers. Networking is the base of cybersecurity, and you must know networking to start your career in cybersecurity. Here, we will look at questions related to the OSI model, Firewall, VPN, TCP/ IP, etc. So, let's get started! Start learning today's most in-demand skills for FREE. Visit us at https://www.simplilearn.com/skillup-f... Choose over 300 in-demand skills and get access to 1000+ hours of video content for FREE in various technologies like Data Science, Cybersecurity, Project Management & Leadership, Digital Marketing, and much more. Start learning today's most in-demand skills for FREE. Visit us at https://www.simplilearn.com/skillup-f... Choose over 300 in-demand skills and get access to 1000+ hours of video content for FREE in various technologies like Data Science, Cybersecurity, Project Management & Leadership, Digital Marketing, and much more. Post Graduate Program in Cyber Security: This Post Graduate Program in Cyber Security is designed to equip you with the skills required to become an expert in the rapidly growing field of Cyber Security. This cyber security course aims to help you stay abreast all the latest trends in cyber security as well. This Post Graduate Program in Cyber Security will help you learn comprehensive approaches to protecting your infrastructure and securing your data, including risk analysis and mitigation, cloud-based security, and compliance. You will receive foundational to advanced security skills through industry-leading certification courses that are part of the program. Key Features: ✅ Simplilearn Post Graduate Certificate ✅ Masterclasses from MIT Faculty ✅ Featuring Modules from MIT SCC and EC-Council ✅ 150+ hours of Applied Learning ✅ Get noticed by the top hiring companies ✅ EC-Council learning kit ✅ Industry case studies in cyber security ✅ MIT SCC Professional Learning Community ✅ Capstone project in 3 domains ✅ 25+ hands-on projects Learn more at: http://bit.ly/37Cf1SK

2. What is the OSI model? Explain the different layers of the OSI
model.
1
The Open Systems Interconnection model is a
reference model that describes how applications
interact with each other over a computer
network. The OSI model has 7 layers, they are
as shown alongside:

3. What is the OSI model? Explain the different layers of the OSI
model.
1
The Open Systems Interconnection model is a
reference model that describes how applications
interact with each other over a computer
network. The OSI model has 7 layers, they are
as shown alongside:
Physical layer
Data link layer
Network layer
Transport layer
Session layer
Presentation layer
Application layer
Physical link
Transmit
data
Receive
data
User

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5. What is the OSI model? Explain the different layers of the OSI
model.
1
Physical layer
Data link layer
Network layer
Transport layer
Session layer
Presentation layer
Application layer
Physical link
Transmit
data
Receive
data
User
This is the lowest level of the OSI model. Here,
data is converted into an electrical impulse so
that it can be sent through a physical medium. It
is also responsible for the physical connection
between the devices

6. What is the OSI model? Explain the different layers of the OSI
model.
1
Physical layer
Data link layer
Network layer
Transport layer
Session layer
Presentation layer
Application layer
Physical link
Transmit
data
Receive
data
User
Data packet is encoded and decoded into bits.
This layer looks into the node to node delivery of
a message

7. What is the OSI model? Explain the different layers of the OSI
model.
1
Physical layer
Data link layer
Network layer
Transport layer
Session layer
Presentation layer
Application layer
Physical link
Transmit
data
Receive
data
User
Here, datagrams are transferred from one to
another. The functions of this layer are routing
and logical addressing

8. What is the OSI model? Explain the different layers of the OSI
model.
1
Physical layer
Data link layer
Network layer
Transport layer
Session layer
Presentation layer
Application layer
Physical link
Transmit
data
Receive
data
User
This layer is responsible for end to end
connections. The data in this layer is called
segments

9. What is the OSI model? Explain the different layers of the OSI
model.
1
Physical layer
Data link layer
Network layer
Transport layer
Session layer
Presentation layer
Application layer
Physical link
Transmit
data
Receive
data
User
This layer controls signals between computers. It
establishes, maintains, and terminates
connections between processes

10. What is the OSI model? Explain the different layers of the OSI
model.
1
Physical layer
Data link layer
Network layer
Transport layer
Session layer
Presentation layer
Application layer
Physical link
Transmit
data
Receive
data
User
The presentation layer is responsible to translate
data into the application layer format. The data is
formatted, encrypted, and then sent to the next
layer

11. What is the OSI model? Explain the different layers of the OSI
model.
1
Physical layer
Data link layer
Network layer
Transport layer
Session layer
Presentation layer
Application layer
Physical link
Transmit
data
Receive
data
User
Here, services are provided to the end users

12. Define Unicasting, Multicasting, and Broadcasting2
Data is transmitted over a network by three methods such as Unicast, Multicast, and Broadcast

13. Define Unicasting, Multicasting, and Broadcasting2
Here, information is sent from a single user to a
single receiver. This is used for point-to-point
communications. If you have to send information
to multiple receivers, then you would have to
send multiple unicast messages.
Unicast
Multicast
Broadcast
Data is transmitted over a network by three methods such as Unicast, Multicast, and Broadcast

14. Define Unicasting, Multicasting, and Broadcasting2
Data is transmitted over a network by three methods such as Unicast, Multicast, and Broadcast
Unicast
Multicast
Broadcast
As the name suggests, in this mode of
communication, data is sent from one or more
sources to multiple destinations. Multicast uses
the Internet Group Management Protocol to
identify groups.

15. Define Unicasting, Multicasting, and Broadcasting2
The third method is known as broadcast, it is
known as one-to-all, i.e.; the communication is
between a single user and multiple receivers.
Data is transmitted over a network by three methods such as Unicast, Multicast, and Broadcast
Unicast
Multicast
Broadcast

16. What is DNS?3
Local PC
What is the IP of cybersecurity.com?
DNS stands for Domain Name System. It is like the internet’s phone book that is responsible for
mapping the domain name into its corresponding IP address
https://cybersecurity.com
DNS Server

17. What is DNS?3
Local PC DNS Server
What is the IP of cybersecurity.com?
DNS stands for Domain Name System. It is like the internet’s phone book that is responsible for
mapping the domain name into its corresponding IP address
https://cybersecurity.com
172.17.252.1
This is the IP address:

18. What is a Firewall?4
Firewall Private networkInternet
Good traffic
Firewall is a hardware or software that is responsible for blocking either incoming or outgoing traffic
from the internet to your computer. They secure a network.

19. What is a Firewall?4
FirewallInternet
Good traffic
Firewall is a hardware or software that is responsible for blocking either incoming or outgoing traffic
from the internet to your computer. They secure a network.
Private network

20. What is a Firewall?4
Firewall Private network
Bad traffic
Firewall is a hardware or software that is responsible for blocking either incoming or outgoing traffic
from the internet to your computer. They secure a network.
Internet

21. What is a Firewall?4
Few common types of firewalls are:

22. What is a Firewall?4
Few common types of firewalls are:
They are the most common
type of firewalls which analyze
packets and let them pass
through only if they match an
established security rule set
1. Packet-filtering
firewalls

23. What is a Firewall?4
Few common types of firewalls are:
They are the most common
type of firewalls which analyze
packets and let them pass
through only if they match an
established security rule set
1. Packet-filtering
firewalls
These firewalls filter network
traffic at the application level
2. Proxy firewalls

24. What is a Firewall?4
Few common types of firewalls are:
They are the most common
type of firewalls which analyze
packets and let them pass
through only if they match an
established security rule set
1. Packet-filtering
firewalls
These firewalls filter network
traffic at the application level
2. Proxy firewalls 3. Stateful multilayer inspection
(SMLI) firewalls
They filter packets at the
network, transport, and
application layers. The packets
are compared to the known
trusted packets

25. What is a VPN?
?
5
Virtual Private Network (VPN) is a connection between a VPN server and a VPN client. It is a
secure tunnel across the internet
VPN client Hacker VPN server Internet
Encrypted tunnel

26. What are the advantages of distributed processing?
?
6
Distributed processing is a term which describes various computer systems that use more than one
processor to run an application. Here, multiple computers across different locations share the same
processor. The advantages of distributed processing are :

27. What are the advantages of distributed processing?
?
6
Distributed processing is a term which describes various computer systems that use more than one
processor to run an application. Here, multiple computers across different locations share the same
processor. The advantages of distributed processing are :
1
2
3
4
Data Recovery
Reliable Easy to expand
Lower cost

28. What are the advantages of distributed processing?
?
6
Distributed processing is a term which describes various computer systems that use more than one
processor to run an application. Here, multiple computers across different locations share the same
processor. The advantages of distributed processing are :
Data Recovery
1
2
3
4
If there is loss of data in one computer, then it can be
recovered by another interconnected computer
Reliable Easy to expand
Lower cost

29. What are the advantages of distributed processing?
?
6
Distributed processing is a term which describes various computer systems that use more than one
processor to run an application. Here, multiple computers across different locations share the same
processor. The advantages of distributed processing are :
Reliable
1
2
3
4
Data Recovery
A glitch in one machine does not affect the processing as
there will be multiple other machines
Easy to expand
Lower cost

30. What are the advantages of distributed processing?
?
6
Distributed processing is a term which describes various computer systems that use more than one
processor to run an application. Here, multiple computers across different locations share the same
processor. The advantages of distributed processing are :
1
2
3
4
Data Recovery
Reliable
Lower cost
Several cost-effective minicomputers are used instead of
costlier mainframe machines
Easy to expand

31. What are the advantages of distributed processing?
?
6
Distributed processing is a term which describes various computer systems that use more than one
processor to run an application. Here, multiple computers across different locations share the same
processor. The advantages of distributed processing are :
Easy to expand
1
2
3
4
Data Recovery
Reliable
Depending on the amount of data processing, more
computers can be attached to the network
Lower cost

32. What is TCP/ IP?7
TCP (Transmission Control Protocol) is a set of
communication protocols that are used to interconnect
network devices on the internet
This protocol defines how data should be
transmitted over the internet by providing end-to-
end communication

33. What is TCP/ IP?7
TCP (Transmission Control Protocol) is a set of
communication protocols that are used to interconnect
network devices on the internet
This protocol defines how data should be
transmitted over the internet by providing end-to-
end communication
IP (Internet Protocol) is all about routing each
individual packet to make sure it reaches its
destination
The TCP/IP model is a compressed version of the
OSI model

34. What is TCP/ IP?7
TCP (Transmission Control Protocol) is a set of
communication protocols that are used to interconnect
network devices on the internet
This protocol defines how data should be
transmitted over the internet by providing end-to-
end communication
IP (Internet Protocol) is all about routing each
individual packet to make sure it reaches its
destination
The TCP/IP model is a compressed version of the
OSI model
The TCP/IP model consists of four layers, they are:
Application layer
Transport layer
Network Access layer
Internet layer

35. What do you mean by ipconfig and ifconfig?8
ipconfig is known as Internet Protocol
Configuration. This command is used on
Microsoft Windows to view and configure the
network interface
It is useful for displaying all TCP/IP network summary
information currently available on a network. It also
helps to modify the DHCP protocol and DNS setting

36. What do you mean by ipconfig and ifconfig?8
ifconfig (Interface Configuration) is a command
that is used on Linux, Mac, and UNIX operating
systems
It is used to configure, control the TCP/IP network
interface parameters from CLI i.e. Command Line
Interface. It allows you to see the IP addresses of
these network interfaces.

37. What is the difference between domain and workgroup?9
1
2
3
1
2
3
Domain Workgroup
It is a centralized network model It is a decentralized network
One administrator manages the domain
and its resources
Every user manages the resources
individually on their PCs
Good for large network
4 4The computer can be connected to any
network
All the computers should be connected to
the same LAN
Good for small network

38. What is Data encapsulation in networking?10
Data encapsulation refers to the process of adding headers and trailers to the data. The data link layer
binds each packet into a frame that contains the hardware address of the source and the destination
computer
DATAHEADER TRAILER
Encapsulation
Headers and Trailers provide the source and destination addresses

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