CCNA 200-301 Practice Exam (10-Question Sample)
A free 10-question sample from CISNET. Answer all ten, then check the key at the bottom. These are original questions covering the main CCNA 200-301 domains. Want instant scoring? Use the interactive CCNA practice quiz.
Questions
1. At which OSI layer does a LAN switch primarily forward traffic?
- A) Layer 1 (Physical)
- B) Layer 2 (Data Link)
- C) Layer 3 (Network)
- D) Layer 4 (Transport)
2. Which of the following is a private IPv4 address (RFC 1918)?
- A) 172.34.5.1
- B) 192.168.300.1
- C) 10.250.10.5
- D) 172.40.0.1
3. How many usable host addresses are in a /27 subnet?
- A) 32
- B) 30
- C) 14
- D) 62
4. What is the subnet mask for a /26 network?
- A) 255.255.255.224
- B) 255.255.255.192
- C) 255.255.255.240
- D) 255.255.255.128
5. What is the default administrative distance of OSPF on a Cisco router?
- A) 90
- B) 100
- C) 110
- D) 120
6. Which protocol resolves a known IPv4 address to a MAC address on the local network?
- A) DNS
- B) DHCP
- C) ARP
- D) ICMP
7. What is the default VLAN on a Cisco Catalyst switch?
- A) VLAN 0
- B) VLAN 1
- C) VLAN 99
- D) VLAN 1005
8. A trunk port between two switches tags frames using which standard?
- A) 802.1Q
- B) 802.11ac
- C) 802.3af
- D) 802.1X
9. Which NAT method lets many internal hosts share one public IP using port numbers?
- A) Static NAT
- B) Dynamic NAT
- C) PAT (NAT overload)
- D) Proxy ARP
10. What is the correct order of the DHCP lease process?
- A) Offer, Discover, Request, Acknowledge
- B) Discover, Offer, Request, Acknowledge
- C) Request, Discover, Offer, Acknowledge
- D) Discover, Request, Offer, Acknowledge
Answer Key
| # | Answer | Why |
|---|---|---|
| 1 | B | Switches forward by MAC address, which is Layer 2 (Data Link). |
| 2 | C | 10.250.10.5 sits inside 10.0.0.0/8. The 172 options fall outside 172.16-172.31, and 192.168.300.1 is invalid. |
| 3 | B | A /27 leaves 5 host bits: 32 total addresses minus network and broadcast = 30 usable. |
| 4 | B | /26 is 11000000 in the last octet = 192, so 255.255.255.192. |
| 5 | C | OSPF default AD is 110 (EIGRP 90, RIP 120, static 1, connected 0). |
| 6 | C | ARP maps a known IP to the MAC needed for the Layer 2 frame. |
| 7 | B | All ports are in VLAN 1 by default; move user traffic off it for security. |
| 8 | A | 802.1Q tags frames with their VLAN ID across a trunk. |
| 9 | C | PAT (NAT overload) maps many private hosts to one public IP using unique source ports. |
| 10 | B | DHCP follows DORA: Discover, Offer, Request, Acknowledge. |
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