Network+ Practice Test: Test Your Knowledge 2025

A network administrator needs to segment a physical network into multiple logical networks to separate voice and data traffic. Which technology should be implemented?

A network technician is troubleshooting connectivity issues and notices that a device has an IP address of 169.254.100.45. What does this indicate?

Which port number and protocol combination is used by DNS for standard name resolution queries?

A company wants to ensure that network traffic between two branch offices is encrypted while traversing the public internet. Which solution should be implemented?

Which cable type should be used to directly connect two switches without an intermediary device?

A network engineer is designing a wireless network for a warehouse that experiences significant interference from metal shelving and machinery. Which frequency band and technology would provide the best penetration and reliability?

An administrator configures a switch port with the following settings: PortFast enabled, BPDU Guard enabled. What is the primary purpose of this configuration?

A company's web server is located on a private network with IP address 192.168.1.100. The administrator needs to make it accessible from the internet using the public IP 203.0.113.50. Which NAT type should be configured?

During a network security audit, an administrator discovers unauthorized DHCP servers on the network. Which security feature should be implemented on switches to prevent this?

Users report intermittent connectivity issues. A technician runs a cable tester and receives the following results: Pins 1-2 and 3-6 show continuity, but pins 4-5 and 7-8 show open circuits. What is the most likely issue?

A network administrator needs to implement a solution that provides centralized authentication, authorization, and accounting for network device access. Which protocol should be used?

An organization uses a /24 subnet for its main office. The network team needs to create 6 subnets for different departments while maximizing the number of hosts per subnet. How many additional bits should be borrowed from the host portion?

A network operations team is implementing monitoring for their infrastructure. They need to collect real-time performance metrics from switches and routers. Which protocol and port combination should be configured?

Users in a building report that their wireless connections drop frequently when moving between floors. SSID, security settings, and channel configurations are identical across all access points. What is the most likely cause?

A company implements a new QoS policy to prioritize VoIP traffic. Which marking method operates at Layer 3 and provides up to 64 different classification levels?

A network architect is designing a data center network using a spine-and-leaf topology. What is the primary advantage of this design compared to a traditional three-tier architecture?

An administrator troubleshoots an issue where internal hosts can communicate with each other but cannot reach external websites. The default gateway is reachable, and DNS resolution works. Running traceroute shows packets reaching the internal router but timing out afterward. What is the most likely cause?

A security team implements network access control where devices must be authenticated before gaining network access. Switches need to communicate with a RADIUS server, but legacy devices without supplicant software must also connect. Which configuration approach should be used?

A company's network experiences a spanning tree topology change. Legitimate switches are sending BPDUs with higher priority values, but the network converges on a suboptimal root bridge. What is the most likely misconfiguration?

A network engineer investigates BGP routing issues between autonomous systems. The BGP neighbor relationship establishes successfully, but routes are not being advertised. The engineer verifies that routes exist in the local routing table. What is the most likely cause?