Network Engineer Quiz

1. What does a subnet mask do in networking?

A) Provides encryption B) Filters spam C) Divides the network and host portions D) Measures bandwidth

2. Which layer of the OSI Model is responsible for routing?

A) Physical B) Data Link C) Network D) Session

3. Which device operates at Layer 2 but can sometimes act at Layer 3?

A) Hub B) Switch C) Repeater D) Firewall

4. What does DNS stand for?

A) Direct Network Signal B) Digital Node System C) Domain Name System D) Data Networking Server

5. Which of the following is a private IP address range?

A) 172.16.0.0 - 172.31.255.255 B) 8.8.8.8 C) 192.0.2.0 D) 198.51.100.0

6. What's the default port number for HTTPS?

A) 80 B) 21 C) 443 D) 22

7. Which protocol is used for dynamic IP assignment?

A) DNS B) ARP C) DHCP D) FTP

8. Which one of these is a distance-vector routing protocol?

A) OSPF B) RIP C) BGP D) IS-IS

9. What does MTU stand for in networking?

A) Maximum Time Unit B) Minimum Transmission Usage C) Maximum Transmission Unit D) Multi Tasking Unit

10. Which command displays the routing table in a Windows system?

A) ping B) ipconfig C) netstat -r D) tracert

11. What is the main purpose of VLANs in networking?

A) Increase internet speed B) Reduce cabling cost C) Improve security and segment traffic D) Disable firewalls

12. What's the default subnet mask for a Class C network?

A) 255.0.0.0 B) 255.255.255.0 C) 255.255.0.0 D) 255.255.255.255

13. Which device is used to connect two different networks?

A) Switch B) Hub C) Bridge D) Router

14. SSL/TLS works at which layer of the OSI model?

A) Physical B) Session C) Data Link D) Network

15. Which IP protocol version allows a virtually unlimited number of addresses?

A) IPv4 B) IPv5 C) IPv6 D) IPv3

16. In networking, what is the purpose of NAT?

A) Data compression B) Convert private IP to public IP C) Virus protection D) Generate MAC addresses

17. Which command helps to check network connectivity?

A) ipconfig B) nslookup C) ping D) route

18. Which wireless standard operates on 5GHz frequency?

A) 802.11a B) 802.11b C) 802.11g D) 802.11n (only)

19. Which layer of the OSI Model does a MAC address belong to?

A) Network B) Physical C) Data Link D) Application

20. What is the function of ARP (Address Resolution Protocol)?

A) Resolve DNS queries B) Resolve IP address to MAC C) Compress packets D) Encrypt data

21. Which of the following is a link-state routing protocol?

A) RIP B) EIGRP C) OSPF D) BGP

22. If a switch receives a broadcast frame, what will it do?

A) Send to the sender only B) Drop the frame C) Forward to all ports except incoming D) Encrypt and send

23. What is the purpose of a firewall in networking?

A) Increase bandwidth B) Protect the network from unauthorized access C) Connect multiple computers D) Assign IP addresses

24. Which of the following is a border gateway protocol?

A) OSPF B) BGP C) RIP D) EIGRP

25. If you need to remotely manage a router securely, which protocol will you use?

A) Telnet B) FTP C) SSH D) SMTP

Network Engineer Quiz

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