CISCO CCNA PRACTICE EXAM LATEST 2026 UPDATE
100 QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
1. What is the primary function of a router?
A. Filter MAC addresses
B. Forward packets between networks
C. Assign IP addresses
D. Encrypt traffic
Answer: B
Rationale: A router operates at Layer 3 and forwards packets between different IP
networks.
2. Which OSI layer is responsible for logical addressing?
A. Physical
B. Data Link
C. Network
D. Transport
Answer: C
Rationale: The Network layer handles IP addressing and routing.
3. What command displays interface status on Cisco devices?
A. show ip route
B. show version
,C. show interfaces status
D. ping
Answer: C
Rationale: This command provides interface operational status.
4. Which protocol is used to assign IP addresses automatically?
A. DNS
B. DHCP
C. FTP
D. ARP
Answer: B
Rationale: DHCP dynamically assigns IP configuration to hosts.
5. What is the default subnet mask for a Class C network?
A. 255.0.0.0
B. 255.255.0.0
C. 255.255.255.0
D. 255.255.255.255
Answer: C
Rationale: Class C networks use /24 masks by default.
6. Which layer adds MAC addresses?
A. Network
B. Data Link
C. Transport
D. Session
,Answer: B
Rationale: The Data Link layer encapsulates frames with MAC addresses.
7. What does VLAN stand for?
A. Virtual Local Area Network
B. Variable LAN
C. Virtual Link Access Node
D. Verified LAN
Answer: A
Rationale: VLANs logically segment networks.
8. Which device separates broadcast domains?
A. Switch
B. Hub
C. Router
D. Repeater
Answer: C
Rationale: Routers break broadcast domains.
9. What protocol resolves IP to MAC addresses?
A. DNS
B. DHCP
C. ARP
D. ICMP
Answer: C
Rationale: ARP maps IP addresses to MAC addresses.
, 10. Which port is used by HTTP?
A. 21
B. 80
C. 443
D. 25
Answer: B
Rationale: HTTP uses TCP port 80.
11. What is the purpose of a switch?
A. Route traffic between networks
B. Forward frames using MAC addresses
C. Assign IP addresses
D. Encrypt data
Answer: B
Rationale: Switches operate at Layer 2 using MAC tables.
12. What does NAT do?
A. Encrypts traffic
B. Translates IP addresses
C. Routes packets
D. Filters emails
Answer: B
Rationale: NAT translates private IPs to public IPs.
13. Which protocol is connectionless?
100 QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
1. What is the primary function of a router?
A. Filter MAC addresses
B. Forward packets between networks
C. Assign IP addresses
D. Encrypt traffic
Answer: B
Rationale: A router operates at Layer 3 and forwards packets between different IP
networks.
2. Which OSI layer is responsible for logical addressing?
A. Physical
B. Data Link
C. Network
D. Transport
Answer: C
Rationale: The Network layer handles IP addressing and routing.
3. What command displays interface status on Cisco devices?
A. show ip route
B. show version
,C. show interfaces status
D. ping
Answer: C
Rationale: This command provides interface operational status.
4. Which protocol is used to assign IP addresses automatically?
A. DNS
B. DHCP
C. FTP
D. ARP
Answer: B
Rationale: DHCP dynamically assigns IP configuration to hosts.
5. What is the default subnet mask for a Class C network?
A. 255.0.0.0
B. 255.255.0.0
C. 255.255.255.0
D. 255.255.255.255
Answer: C
Rationale: Class C networks use /24 masks by default.
6. Which layer adds MAC addresses?
A. Network
B. Data Link
C. Transport
D. Session
,Answer: B
Rationale: The Data Link layer encapsulates frames with MAC addresses.
7. What does VLAN stand for?
A. Virtual Local Area Network
B. Variable LAN
C. Virtual Link Access Node
D. Verified LAN
Answer: A
Rationale: VLANs logically segment networks.
8. Which device separates broadcast domains?
A. Switch
B. Hub
C. Router
D. Repeater
Answer: C
Rationale: Routers break broadcast domains.
9. What protocol resolves IP to MAC addresses?
A. DNS
B. DHCP
C. ARP
D. ICMP
Answer: C
Rationale: ARP maps IP addresses to MAC addresses.
, 10. Which port is used by HTTP?
A. 21
B. 80
C. 443
D. 25
Answer: B
Rationale: HTTP uses TCP port 80.
11. What is the purpose of a switch?
A. Route traffic between networks
B. Forward frames using MAC addresses
C. Assign IP addresses
D. Encrypt data
Answer: B
Rationale: Switches operate at Layer 2 using MAC tables.
12. What does NAT do?
A. Encrypts traffic
B. Translates IP addresses
C. Routes packets
D. Filters emails
Answer: B
Rationale: NAT translates private IPs to public IPs.
13. Which protocol is connectionless?
