Cisco Certified Network Associate (CCNA
200-301) Exam Practice Examination
2026–2027 | Comprehensive Question
Practice Test with Answers & Rationales|
Free Pdf Access
1. Which layer of the OSI model is responsible for routing packets between networks?
A. Network Layer
B. Data Link Layer
C. Physical Layer
D. Session Layer
Correct Answer: A
Rationale: The Network Layer (Layer 3) handles logical addressing and routing between
networks.
2. How many layers are included in the OSI model?
A. Seven
B. Five
C. Four
D. Six
Correct Answer: A
Rationale: The OSI model consists of seven layers that describe network communication
functions.
,3. Which OSI layer is responsible for frame forwarding using MAC addresses?
A. Data Link Layer
B. Network Layer
C. Transport Layer
D. Application Layer
Correct Answer: A
Rationale: Layer 2 devices use MAC addresses to forward Ethernet frames.
4. What is the primary function of a router?
A. Forward traffic between networks
B. Assign MAC addresses
C. Encrypt files
D. Print documents
Correct Answer: A
Rationale: Routers connect different networks and determine the best path for packets.
5. Which device primarily operates at Layer 2 of the OSI model?
A. Switch
B. Router
C. Modem
D. Firewall
Correct Answer: A
Rationale: Switches forward frames using MAC address information.
6. What is the default administrative distance of a directly connected route?
A. 0
B. 1
C. 90
D. 110
Correct Answer: A
Rationale: Directly connected routes are considered the most trustworthy routes.
, 7. What protocol automatically assigns IP addresses to clients?
A. DHCP
B. DNS
C. FTP
D. SNMP
Correct Answer: A
Rationale: DHCP automates IP address assignment and network configuration.
8. What is the primary purpose of DNS?
A. Resolve hostnames into IP addresses
B. Assign IP addresses
C. Encrypt traffic
D. Route packets
Correct Answer: A
Rationale: DNS translates human-readable names into IP addresses.
9. Which IPv4 address class traditionally supports the largest number of hosts?
A. Class A
B. Class B
C. Class C
D. Class D
Correct Answer: A
Rationale: Class A networks provide the largest host capacity.
10. What is the subnet mask for a /24 network?
A. 255.255.255.0
B. 255.255.0.0
C. 255.0.0.0
D. 255.255.255.128
Correct Answer: A
200-301) Exam Practice Examination
2026–2027 | Comprehensive Question
Practice Test with Answers & Rationales|
Free Pdf Access
1. Which layer of the OSI model is responsible for routing packets between networks?
A. Network Layer
B. Data Link Layer
C. Physical Layer
D. Session Layer
Correct Answer: A
Rationale: The Network Layer (Layer 3) handles logical addressing and routing between
networks.
2. How many layers are included in the OSI model?
A. Seven
B. Five
C. Four
D. Six
Correct Answer: A
Rationale: The OSI model consists of seven layers that describe network communication
functions.
,3. Which OSI layer is responsible for frame forwarding using MAC addresses?
A. Data Link Layer
B. Network Layer
C. Transport Layer
D. Application Layer
Correct Answer: A
Rationale: Layer 2 devices use MAC addresses to forward Ethernet frames.
4. What is the primary function of a router?
A. Forward traffic between networks
B. Assign MAC addresses
C. Encrypt files
D. Print documents
Correct Answer: A
Rationale: Routers connect different networks and determine the best path for packets.
5. Which device primarily operates at Layer 2 of the OSI model?
A. Switch
B. Router
C. Modem
D. Firewall
Correct Answer: A
Rationale: Switches forward frames using MAC address information.
6. What is the default administrative distance of a directly connected route?
A. 0
B. 1
C. 90
D. 110
Correct Answer: A
Rationale: Directly connected routes are considered the most trustworthy routes.
, 7. What protocol automatically assigns IP addresses to clients?
A. DHCP
B. DNS
C. FTP
D. SNMP
Correct Answer: A
Rationale: DHCP automates IP address assignment and network configuration.
8. What is the primary purpose of DNS?
A. Resolve hostnames into IP addresses
B. Assign IP addresses
C. Encrypt traffic
D. Route packets
Correct Answer: A
Rationale: DNS translates human-readable names into IP addresses.
9. Which IPv4 address class traditionally supports the largest number of hosts?
A. Class A
B. Class B
C. Class C
D. Class D
Correct Answer: A
Rationale: Class A networks provide the largest host capacity.
10. What is the subnet mask for a /24 network?
A. 255.255.255.0
B. 255.255.0.0
C. 255.0.0.0
D. 255.255.255.128
Correct Answer: A
