CCNA MCQs Questions with Answers [Quiz]

CCNA MCQs Questions with Answers [Quiz]: CCNA (Cisco Certified Network Associate) MCQs along with their answers.

CCNA Multiple Choice Questions

1. Which of the following layers of the OSI model is responsible for establishing, managing, and terminating sessions?

• A. Physical Layer
• B. Data Link Layer
• C. Session Layer
• D. Network Layer

Answer: C. Session Layer

2. Which IP address class provides the most hosts per network?

• A. Class A
• B. Class B
• C. Class C
• D. Class D

Answer: A. Class A

3. What is the purpose of the Address Resolution Protocol (ARP)?

• A. To map IP addresses to MAC addresses
• B. To map MAC addresses to IP addresses
• C. To discover network devices
• D. To manage routing tables

Answer: A. To map IP addresses to MAC addresses

4. Which command is used to display the routing table on a Cisco router?

• A. show ip table
• B. show ip route
• C. show routing
• D. show route

Answer: B. show ip route

5. Which protocol is used to automatically assign IP addresses to hosts?

• A. DNS
• B. DHCP
• C. ARP
• D. ICMP

Answer: B. DHCP

6. What is the maximum number of IP addresses that can be assigned to hosts in a /24 subnet?

• A. 254
• B. 256
• C. 512
• D. 1024

Answer: A. 254

7. Which of the following is a Class C IP address?

• A. 192.168.1.1
• B. 172.16.5.4
• C. 10.0.0.5
• D. 224.0.0.1

Answer: A. 192.168.1.1

8. What is the purpose of the “ping” command in networking?

• A. To send data to a remote server
• B. To test the reachability of a host
• C. To establish a session between hosts
• D. To transfer files between hosts

Answer: B. To test the reachability of a host

9. Which routing protocol uses a metric based on hop count?

• A. OSPF
• B. EIGRP
• C. RIP
• D. BGP

Answer: C. RIP

10. Which layer of the OSI model is responsible for error detection and correction?

• A. Physical
• B. Data Link
• C. Network
• D. Transport

Answer: B. Data Link

11. Which of the following protocols operates at the Transport Layer of the OSI model?

• A. HTTP
• B. FTP
• C. TCP
• D. ICMP

Answer: C. TCP

12. What is the default administrative distance of OSPF?

• A. 90
• B. 100
• C. 110
• D. 120

Answer: C. 110

13. Which of the following subnet masks provides the most subnets with at least 14 host addresses per subnet?

• A. 255.255.255.248 (/29)
• B. 255.255.255.240 (/28)
• C. 255.255.255.224 (/27)
• D. 255.255.255.192 (/26)

Answer: C. 255.255.255.224 (/27)

14. Which of the following commands is used to configure a default route on a Cisco router?

• A. ip route 0.0.0.0 0.0.0.0 [next-hop-ip]
• B. ip route 0.0.0.0 255.255.255.255 [next-hop-ip]
• C. ip route 0.0.0.0 0.0.0.0
• D. route 0.0.0.0

Answer: A. ip route 0.0.0.0 0.0.0.0 [next-hop-ip]

15. What is the primary purpose of VLANs in a network?

• A. To create separate collision domains
• B. To increase bandwidth
• C. To create separate broadcast domains
• D. To enhance security

Answer: C. To create separate broadcast domains

16. What command is used to save the running configuration to the startup configuration on a Cisco device?

• A. copy running-config startup-config
• B. write memory
• C. save config
• D. Both A and B

Answer: D. Both A and B

17. Which command is used to enter Global Configuration Mode on a Cisco router?

• A. configure terminal
• B. config t
• C. config
• D. configure

Answer: A. configure terminal

18. In a router, what is the function of NAT (Network Address Translation)?

• A. To map public IP addresses to private IP addresses
• B. To provide redundancy in routing
• C. To route traffic between subnets
• D. To dynamically assign IP addresses

Answer: A. To map public IP addresses to private IP addresses

19. Which protocol is used for secure remote access to a Cisco router?

• A. Telnet
• B. HTTP
• C. SSH
• D. FTP

Answer: C. SSH

20. What is the default port number for HTTPS?

• A. 21
• B. 22
• C. 80
• D. 443

Answer: D. 443

21. What is the binary equivalent of the decimal number 192?

• A. 11000000
• B. 10101010
• C. 11111100
• D. 10000000

Answer: A. 11000000

22. Which of the following is a characteristic of a Layer 2 switch?

• A. It operates based on IP addresses.
• B. It operates based on MAC addresses.
• C. It routes packets between different networks.
• D. It breaks up broadcast domains.

Answer: B. It operates based on MAC addresses.

23. Which Cisco IOS command will display information about the currently active NAT translations?

• A. show ip nat translations
• B. show running-config nat
• C. show nat translation
• D. show ip nat table

Answer: A. show ip nat translations

24. What is the maximum number of usable host addresses in a /30 subnet?

• A. 2
• B. 4
• C. 6
• D. 8

Answer: A. 2

25. Which of the following protocols uses a three-way handshake to establish a connection?

• A. UDP
• B. TCP
• C. ICMP
• D. SNMP

Answer: B. TCP

26. Which command is used to assign an IP address to a router interface?

• A. ip address [ip address] [subnet mask]
• B. set ip address [ip address] [subnet mask]
• C. assign ip [ip address]
• D. address [ip address] [subnet mask]

Answer: A. ip address [ip address] [subnet mask]

27. Which Cisco IOS command is used to configure a router as a DHCP server?

• A. ip dhcp server
• B. ip dhcp pool
• C. service dhcp
• D. ip dhcp relay

Answer: B. ip dhcp pool

28. Which protocol is used to securely collect and monitor network device logs and alerts?

• A. SNMPv2
• B. SNMPv3
• C. FTP
• D. Telnet

Answer: B. SNMPv3

29. Which routing protocol is typically used within an Autonomous System (AS)?

• A. BGP
• B. OSPF
• C. EIGRP
• D. RIP

Answer: B. OSPF

30. Which command is used to enable a router interface?

• A. enable interface
• B. activate interface
• C. no shutdown
• D. open interface

Answer: C. no shutdown

31. What does the acronym ACL stand for in networking?

• A. Access Connection List
• B. Access Control List
• C. Address Control List
• D. Access Checking List

Answer: B. Access Control List

32. Which of the following protocols is used for email retrieval?

• A. SMTP
• B. POP3
• C. IMAP
• D. Both B and C

Answer: D. Both B and C

33. What is the administrative distance of a directly connected route?

• A. 0
• B. 1
• C. 90
• D. 110

Answer: B. 1

34. Which of the following is a characteristic of static routing?

• A. It automatically adjusts to network changes.
• B. It consumes less bandwidth than dynamic routing.
• C. It requires manual configuration of routes.
• D. Both B and C

Answer: D. Both B and C

35. Which protocol provides dynamic IP address allocation to devices in a network?

• A. DNS
• B. DHCP
• C. ARP
• D. ICMP

Answer: B. DHCP

36. Which of the following describes a trunk port on a switch?

• A. It can carry multiple VLANs.
• B. It is used to connect end devices to the switch.
• C. It breaks up collision domains.
• D. It can carry only a single VLAN.

Answer: A. It can carry multiple VLANs.

37. What is the primary purpose of the Spanning Tree Protocol (STP)?

• A. To prevent routing loops
• B. To prevent switching loops
• C. To ensure data security
• D. To establish multiple paths for redundancy

Answer: B. To prevent switching loops

38. Which command will display detailed information about a specific interface on a Cisco router?

• A. show interface [interface]
• B. show interfaces
• C. show ip interface
• D. show ip int brief

Answer: A. show interface [interface]

39. What is the purpose of the command router ospf 1 in the OSPF configuration?

• A. To enable OSPF routing
• B. To configure OSPF process ID 1
• C. To set the OSPF priority
• D. To establish an OSPF area

Answer: B. To configure OSPF process ID 1

40. Which of the following is a valid IPv6 address?

• A. 2001:0db8:85a3:0000:0000:8a2e:0370:7334
• B. 192.168.0.1
• C. 255.255.255.255
• D. fe80::1ff:fe23:4567:890a

Answer: A. 2001:0db8:85a3:0000:0000:8a2e:0370:7334

41. What type of network address is 224.0.0.0 to 239.255.255.255?

• A. Unicast
• B. Broadcast
• C. Multicast
• D. Anycast

Answer: C. Multicast

42. Which layer of the OSI model is responsible for data encryption?

• A. Application Layer
• B. Presentation Layer
• C. Session Layer
• D. Transport Layer

Answer: B. Presentation Layer

43. What command is used to view the configuration stored in NVRAM?

• A. show startup-config
• B. show running-config
• C. copy running-config startup-config
• D. view nvram

Answer: A. show startup-config

44. Which command displays the status of all the interfaces on a router?

• A. show interfaces status
• B. show ip interface
• C. show ip int brief
• D. show interfaces

Answer: C. show ip int brief

45. Which Cisco IOS command is used to enable RIP version 2 on a router?

• A. router rip
• B. version 2
• C. ip rip v2
• D. router rip version 2

Answer: A. router rip, then version 2

46. Which of the following WAN technologies uses cell-switching and virtual circuits?

• A. MPLS
• B. Frame Relay
• C. ATM
• D. ISDN

Answer: C. ATM (Asynchronous Transfer Mode)

47. What is the default encapsulation type on a Cisco serial interface?

• A. HDLC
• B. PPP
• C. Frame Relay
• D. ATM

Answer: A. HDLC

48. Which of the following commands displays the IP address and subnet mask of all interfaces on a router?

• A. show running-config
• B. show interfaces
• C. show ip interface brief
• D. show ip route

Answer: C. show ip interface brief

49. What is the purpose of a default gateway in a network?

• A. To allow communication between different VLANs
• B. To route traffic to external networks
• C. To assign IP addresses to hosts
• D. To manage network security

Answer: B. To route traffic to external networks

50. Which command would you use to back up the running configuration of a router to a TFTP server?

• A. copy running-config tftp
• B. backup running-config tftp
• C. copy startup-config tftp
• D. tftp backup running-config

Answer: A. copy running-config tftp

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