Cyber Security Interview Questions Part - 1 | Networking Interview Questions & Answers | Simplilearn

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 Transmit data Receive data User Physical layer Data link layer Network layer 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: Transport layer Session layer Presentation layer Applicationlayer Physical link

4. Click here to watch the video

5. What is the OSI model? Explain the different layers of the OSI model. 1 Transmit data Receive data User Physical layer Data link layer Network layer 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 Transport layer Session layer Presentation layer Applicationlayer Physical link

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

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

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

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

10. What is the OSI model? Explain the different layers of the OSI model. 1 Transmit data Receive data User Physical layer Data link layer Network layer 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 Transport layer Session layer Presentation layer Applicationlayer Physical link

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

12. 2 Define Unicasting, Multicasting, and Broadcasting Data is transmitted over a network by three methods such as Unicast, Multicast, and Broadcast

13. 2 Define Unicasting, Multicasting, and Broadcasting Data is transmitted over a network by three methods such as Unicast, Multicast, and Broadcast Unicast 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. Multicast Broadcast

14. 2 Define Unicasting, Multicasting, and Broadcasting Data is transmitted over a network by three methods such as Unicast, Multicast, and Broadcast Unicast 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. Multicast Broadcast

15. 2 Define Unicasting, Multicasting, and Broadcasting Data is transmitted over a network by three methods such as Unicast, Multicast, and Broadcast Unicast 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.   Multicast Broadcast

16. 3 What is DNS? 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  Local PC DNS Server What is the IP of cybersecurity.com? https://cybersecurity.com

17. 3 What is DNS? 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  Local PC DNS Server What is the IP of cybersecurity.com? This is the IP address: https://cybersecurity.com 172.17.252.1

18. 4 What is a Firewall? 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. Good traffic Firewall Private network Internet

19. 4 What is a Firewall? 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. Good traffic Firewall Private network Internet

20. 4 What is a Firewall? 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. Bad traffic Internet Firewall Private network

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

22. 4 What is a Firewall? Few common types of firewalls are: 1. Packet-filtering firewalls 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

23. 4 What is a Firewall? Few common types of firewalls are: 2. Proxy firewalls 1. Packet-filtering firewalls 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 These firewalls filter network traffic at the application level

24. 4 What is a Firewall? Few common types of firewalls are: 2. Proxy firewalls 1. Packet-filtering firewalls 3. Stateful multilayer inspection (SMLI) firewalls 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 They filter packets at the network, transport, and application layers. The packets are compared to the known trusted packets These firewalls filter network traffic at the application level

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

26. 6 What are the advantages of distributed processing? ? 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. 6 What are the advantages of distributed processing? ? 1 2 3 4 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 : Lower cost Data Recovery Reliable Easy to expand

28. 6 What are the advantages of distributed processing? ? 1 2 3 4 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 Lower cost Reliable Easy to expand If there is loss of data in one computer, then it can be recovered by another interconnected computer

29. 6 What are the advantages of distributed processing? ? 1 2 3 4 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 : Lower cost Data Recovery Reliable Easy to expand A glitch in one machine does not affect the processing as there will be multiple other machines

30. 6 What are the advantages of distributed processing? ? 1 2 3 4 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 : Lower cost Data Recovery Reliable Easy to expand Several cost-effective minicomputers are used instead of costlier mainframe machines

31. 6 What are the advantages of distributed processing? ? 1 2 3 4 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 : Lower cost Data Recovery Easy to expand Reliable Depending on the amount of data processing, more computers can be attached to the network

32. 7 What is TCP/ IP? 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. 7 What is TCP/ IP? TCP (Transmission Control Protocol) is a set of communication protocols that are used to interconnect network devices on the internet IP (Internet Protocol) is all about routing each individual packet to make sure it reaches its destination This protocol defines how data should be transmitted over the internet by providing end-to-end communication The TCP/IP model is a compressed version of the OSI model

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

35. 8 What do you mean by ipconfig and ifconfig? 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. 8 What do you mean by ipconfig and ifconfig? 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. 9 What is the difference between domain and workgroup? Workgroup Domain 1 1 It is a centralized network model It is a decentralized network Every user manages the resources individually on their PCs One administrator manages the domain and its resources 2 2 3 3 Good for large network Good for small network All the computers should be connected to the same LAN The computer can be connected to any network 4 4

38. 10 What is Data encapsulation in networking? 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 Encapsulation HEADER DATA TRAILER Headers and Trailers provide the source and destination addresses

39. Join us to learn more! simplilearn.com UNITED STATES Simplilearn Solutions Pvt. Limited 201 Spear Street, Suite 1100 San Francisco, CA 94105 Phone: (415) 741-3319 INDIA Simplilearn Solutions Pvt. Limited #53/1C, 24th Main, 2nd Sector HSR Layout, Bangalore 560102 Phone: +91 8069999471 UNITED STATES Simplilearn Solutions Pvt. Limited 801 Corporate Center Drive, Suite 138 Raleigh, NC 27607 Phone: (919) 205-5565