Detailed Exam Domain Coverage

Network Fundamentals (20%) Topics: IPv4 addressing, VLANs, EtherChannel
Network Access (20%) Topics: Ethernet technologies, Wireless LAN concepts, LAN access technologies
IP Connectivity (25%) Topics: Static routing, OSPF, Router configuration
IP Services (10%) Topics: DHCP operation, Network address translation (NAT), QoS basics
Security Fundamentals (15%) Topics: Device login security, Access control lists (ACLs), Switch port security
Automation and Programmability (10%) Topics: Network automation concepts, APIs for network devices, Software-defined networking (SDN)

Course Description

Passing the Cisco Certified Network Associate (CCNA) exam requires a firm grasp of how to install, operate, and troubleshoot small to medium-sized enterprise networks. I have structured these practice exams to give you a highly realistic testing experience that targets the exact knowledge areas required by Cisco.

In this practice test course, I provide an extensive collection of original questions carefully mapped to the six core exam domains. Rather than simply giving you the correct answer, I have included a detailed breakdown for every single option. This ensures you understand exactly why a specific configuration command is correct and why the alternatives would fail in a real-world networking scenario. Whether you are reviewing IP Connectivity with OSPF, digging into Security Fundamentals with Access Control Lists, or exploring Automation and Programmability, these mock exams are designed to uncover your weak spots before test day.

By practicing with these specific scenarios, you will build the confidence and speed necessary to analyze network diagrams, evaluate routing tables, and answer complex troubleshooting questions efficiently.

Practice Questions Preview

Question 1: Which of the following commands correctly configures a default static IPv4 route on a Cisco router?
- Option A: ip route 0.0.0.0 0.0.0.0 192.168.1.1
- Option B: ip route 0.0.0.0 255.255.255.255 192.168.1.1
- Option C: ip default-network 192.168.1.0
- Option D: ip route 192.168.1.1 0.0.0.0 0.0.0.0
- Option E: default route 0.0.0.0 0.0.0.0 192.168.1.1
- Option F: route-ip 0.0.0.0 0.0.0.0 via 192.168.1.1
- Correct Answer: Option A
- Explanation:
  - Option A is correct because a default static route requires the destination network and subnet mask to both be 0.0.0.0, followed by the next-hop IP address or exit interface.
  - Option B is incorrect because the subnet mask 255.255.255.255 specifies a precise host route, not a catch-all default route.
  - Option C is incorrect because while this is a legacy command used in older routing environments, it is not the standard or current method to configure a static default route in modern IOS.
  - Option D is incorrect because the syntax is inverted. The destination IP and mask must precede the next-hop address.
  - Option E is incorrect because "default route" is not a recognized Cisco IOS command.
  - Option F is incorrect because "route-ip" and "via" do not follow valid Cisco IOS syntax for static routing.
Question 2: What is the primary function of a VLAN in an enterprise Layer 2 switched network?
- Option A: To route packets between different autonomous systems on the internet.
- Option B: To logically separate broadcast domains within a physical local area network.
- Option C: To provide a wireless access point connection for mobile devices.
- Option D: To encrypt data traffic seamlessly over a wide area network.
- Option E: To assign IP addresses automatically to host devices on the network.
- Option F: To resolve domain names to human-readable IP addresses.
- Correct Answer: Option B
- Explanation:
  - Option A is incorrect because routing between autonomous systems is a Layer 3 function handled by protocols like BGP, not Layer 2 VLANs.
  - Option B is correct because VLANs segment a single physical switch into multiple logical networks, thereby creating isolated broadcast domains to improve security and performance.
  - Option C is incorrect because providing wireless access is the function of a WAP, which operates independently of the core logical switching function of a VLAN.
  - Option D is incorrect because traffic encryption over a WAN is managed by VPNs or IPsec tunnels, not by local VLANs.
  - Option E is incorrect because DHCP (Dynamic Host Configuration Protocol) handles the assignment of IP addresses, not VLANs.
  - Option F is incorrect because name resolution is the responsibility of DNS, which is entirely separate from VLAN operations.
Question 3: According to Cisco best practices, where should a Standard Access Control List (ACL) be placed within the network topology?
- Option A: As close to the source IP address as possible.
- Option B: Directly on the internet-facing edge router.
- Option C: As close to the destination IP address as possible.
- Option D: On the core layer switches only.
- Option E: On the distribution layer switches only.
- Option F: Inside the DMZ firewall segment.
- Correct Answer: Option C
- Explanation:
  - Option A is incorrect because placing a standard ACL close to the source would drop that source's traffic from reaching any destination, since standard ACLs filter based only on the source IP.
  - Option B is incorrect because placing a standard ACL on the edge router might block valid internal traffic unintentionally.
  - Option C is correct because standard ACLs filter traffic based solely on the source IP address without regard for the destination. Placing them close to the destination ensures that traffic is not unnecessarily blocked from reaching other legitimate parts of the network.
  - Option D is incorrect because ACL placement is dictated by traffic flow and ACL type, not strictly confined to the core layer.
  - Option E is incorrect because while distribution switches do handle routing, standard ACLs still follow the rule of being placed closest to the final destination.
  - Option F is incorrect because firewalls manage stateful inspections, but the explicit design rule for standard ACLs dictates placement near the destination endpoint.

Course Features

Welcome to the Mock Exam Practice Tests Academy to help you prepare for your CCNA.
You can retake the exams as many times as you want.
This is a huge original question bank.
You get support from instructors if you have questions.
Each question has a detailed explanation.
Mobile-compatible with the Udemy app.

I hope that by now you're convinced! And there are a lot more questions inside the course.