TheoryCCNA Network Exam Prep Practice Questions
Free CCNA Network Exam Prep practice questions with answers and plain-English explanations. Browse the PDF, video and online mock test.
CCNA Network Exam Prep 2026 Questions
Open each answer, read the explanation, then continue into the full practice flow.
Q1What is the prefix for the following IPv6 address: 2001:0db8:85a3::8a2e:0370:7334 / 48?
Show answer
✓ Correct answer: 2001:0db8:85a3:: / 48
To identify the prefix (subnet ID) in an IPv6 address with a prefix length that is divisible by 4, take the prefix length and divide it by 4 to find the number of hex digits that are in the prefix. Then, change all hex digits after that and change them to 0. If the prefix length is 48, then the first 12 digits are in the prefix.
Q2Which statement correctly explains a characteristic of a fiber-optic point-to-point network?
Show answer
✓ Correct answer: It provides a dedicated communication path between two devices.
Answer: It provides a dedicated communication path between two devices. A fiber-optic point-to-point network creates a direct communication link between two devices, ensuring high-speed data transfer with minimal interference. This is different from shared media networks, where multiple devices share the same communication medium.
Q3What are three disadvantages of using wireless connections for connecting remote branch offices to the main office network? (Choose three.)
Show answer
✓ Correct answer: Bandwidth limitations
Using wireless connections to connect remote branch offices can be convenient, but it comes with several drawbacks. One major drawback is interference, since wireless signals can be easily affected by other devices and obstacles, leading to poor performance. Security is another significant issue because wireless signals can be intercepted more easily than wired connections, increasing the risk of data breaches. Bandwidth limitations are also a common problem, as wireless networks often cannot support as much data throughput as wired connections. However, ease of installation is an advantage of using wireless technology, because it requires less physical infrastructure.
Q4Which of the following has the highest data transmission rate?
Show answer
✓ Correct answer: Fiber optic cable
Answer: Fiber optic cable Fiber optic cables can transmit data at speeds of up to 100 Gbps and beyond, depending on the technology used. Ethernet over twisted pair cables (e.g., CAT5, CAT6) typically support speeds up to 1 Gbps or 10 Gbps. 4G wireless technologies generally support data rates up to 100 Mbps, while 5 GHz Wi-Fi can reach up to 1 Gbps. However, these technologies are still slower compared to fiber optic cables.
Q5Which two statements accurately describe the characteristics of IPv6 unique local addresses? (Choose two.)
Show answer
✓ Correct answer: They are not routable on the global Internet.
IPv6 unique local addresses are used for local communication within a site or organization and are not routable on the global Internet. They start with the prefix FC00::/7. Unique local addresses are analogous to IPv4 private addresses.
Q6Which two statements are true about Network Address Translation (NAT)? (Choose two.)
Show answer
✓ Correct answer: NAT conserves global address space by using a single public IP address for multiple devices.
Network Address Translation (NAT) is a method used to remap IP address spaces by modifying network address information in IP header packets while they are in transit. There are several types of NAT, such as static, dynamic, and PAT (Port Address Translation). NAT can conserve global addresses by enabling multiple devices on a local network to access the internet using a single public IP address. It also adds a layer of security by concealing internal IP addresses.
Q7An administrator needs to adjust the default VLAN idle timeout setting on a Cisco switch. In which section of the switch's GUI can they find the Idle Timeout field to make this change?
Show answer
✓ Correct answer: Management
Answer: Management The Management tab includes settings for user sessions, idle timeouts, and other administrative controls. The Enable Idle Timeout checkbox should be enabled before setting the value for it. Security is for setting up access controls and authentication. QoS is for traffic prioritization. Interface Settings deal with configuration of network interfaces. Logs are for viewing system logs and events.
Q8Which three VLAN membership types are considered static rather than dynamic? (Choose three.)
Show answer
✓ Correct answer: Access VLAN
VLAN memberships can be assigned in a static or dynamic manner. Static VLAN memberships are explicitly assigned to devices or ports by network administrators and remain fixed unless manually changed. The types 'Access VLAN', 'Voice VLAN', and 'Management VLAN' are examples of static VLAN memberships. Dynamic VLAN membership, such as 'VLAN assigned by VMPS' and 'VLAN by RADIUS', is automatically assigned based on criteria like user credentials or MAC address.
Q9Which four fields are included in an EAPOL frame used in 802.1X authentication? (Choose four.)
Show answer
✓ Correct answer: Packet Body Length
An EAPOL (Extensible Authentication Protocol over LAN) frame consists of four key fields. The Protocol Version field specifies the version of the EAPOL protocol being used. The Type field indicates the type of EAPOL packet. The Packet Body Length field specifies the length of the packet body. The Packet Body field contains the actual data of the EAPOL message. The Checksum field is not part of the EAPOL frame.
Q10Which feature is supported by OSPF but not by RIP?
Show answer
✓ Correct answer: Hierarchical network design
Answer: Hierarchical network design OSPF (Open Shortest Path First) supports hierarchical network design through the use of areas, which allows for better scalability and management. RIP (Routing Information Protocol), on the other hand, uses a flat network design and does not support hierarchical structures. Other features of OSPF include the use of Link State routing and a more complex and efficient algorithm compared to the distance-vector routing used by RIP.
Full CCNA Network Exam Prep 2026 bank + unlimited mocks
Try 30 questions free. Unlock the complete CCNA Network Exam Prep 2026 question bank, every explanation, and unlimited timed mock exams. Practice on any device.
Unlock CCNA Network Exam Prep 2026 →