CompTIA Network+ Practice Test 4 1 / 20A technician is troubleshooting a slow network and suspects congestion. What tool should they use to monitor traffic in real time? Nslookup Netstat Traceroute Wireshark Ping Correct Answer: WiresharkExplanation: Wireshark captures and analyzes real-time network traffic to identify congestion.Correct Answer: WiresharkExplanation: Wireshark captures and analyzes real-time network traffic to identify congestion.2 / 20A company needs to connect multiple branch offices securely over the internet. What solution should they use? Static NAT Proxy server Site-to-site VPN VLAN trunking Port mirroring Correct Answer: Site-to-site VPNExplanation: A site-to-site VPN creates a secure, encrypted connection between remote offices.Correct Answer: Site-to-site VPNExplanation: A site-to-site VPN creates a secure, encrypted connection between remote offices.3 / 20A network administrator needs to ensure that only authorized devices can connect to the corporate Wi-Fi. What security measure should they implement? WPA2-Enterprise with RADIUS WEP encryption SSID broadcasting MAC filtering Port mirroring Correct Answer: WPA2-Enterprise with RADIUSExplanation: WPA2-Enterprise with RADIUS provides secure authentication for network access.Correct Answer: WPA2-Enterprise with RADIUSExplanation: WPA2-Enterprise with RADIUS provides secure authentication for network access.4 / 20A user is unable to resolve domain names but can access websites by IP address. What should the technician check? DNS server settings Firewall rules QoS configuration MAC address filtering VLAN assignment Correct Answer: DNS server settingsExplanation: If IP-based access works but hostname resolution fails, the issue is likely a DNS misconfiguration.Correct Answer: DNS server settingsExplanation: If IP-based access works but hostname resolution fails, the issue is likely a DNS misconfiguration.5 / 20A technician is setting up an access point and needs to provide the fastest possible Wi-Fi speed for modern devices. What standard should they choose? 802.11ac 802.11n 802.11ax 802.11g 802.11b Correct Answer: 802.11axExplanation: 802.11ax (Wi-Fi 6) provides the fastest speeds and improved efficiency.Correct Answer: 802.11axExplanation: 802.11ax (Wi-Fi 6) provides the fastest speeds and improved efficiency.6 / 20A technician needs to determine the route data takes to a specific website. What command should they use? Ping Netstat ARP Traceroute Ifconfig Correct Answer: TracerouteExplanation: Traceroute shows the path packets take to reach their destination.Correct Answer: TracerouteExplanation: Traceroute shows the path packets take to reach their destination.7 / 20A company wants to separate guest Wi-Fi traffic from corporate traffic. What should they implement? MAC filtering VLANs Static IP addressing Proxy server Port mirroring Correct Answer: VLANsExplanation: VLANs separate traffic logically within a network to enhance security and management.Correct Answer: VLANsExplanation: VLANs separate traffic logically within a network to enhance security and management.8 / 20A user is experiencing high packet loss on a VoIP call. What should the technician check first? DNS configuration Port mirroring Default gateway MAC address table QoS settings Correct Answer: QoS settingsExplanation: QoS ensures VoIP packets are prioritized to reduce packet loss and call degradation.Correct Answer: QoS settingsExplanation: QoS ensures VoIP packets are prioritized to reduce packet loss and call degradation.9 / 20A technician is troubleshooting a connectivity issue and finds that the workstation is using an IP address of 169.254.5.10. What does this indicate? The firewall is blocking traffic The VLAN is misconfigured The cable is too long The DNS server is down The DHCP server is down Correct Answer: The DHCP server is downExplanation: An APIPA address (169.254.x.x) indicates that the workstation couldn't obtain an IP address from a DHCP server.Correct Answer: The DHCP server is downExplanation: An APIPA address (169.254.x.x) indicates that the workstation couldn't obtain an IP address from a DHCP server.10 / 20A company needs to extend its wired network to a new building without running new cables. What is the best solution? 802.11ac Wi-Fi VLAN trunking Spanning Tree Protocol Ethernet over Power (EoP) MAC filtering Correct Answer: Ethernet over Power (EoP)Explanation: EoP allows Ethernet signals to travel over existing electrical wiring, eliminating the need for new cables.Correct Answer: Ethernet over Power (EoP)Explanation: EoP allows Ethernet signals to travel over existing electrical wiring, eliminating the need for new cables.11 / 20A technician needs to configure a firewall to allow only email traffic. Which ports should they open? 80, 443 20, 21 25, 110, 143 3389, 22 161, 162 Correct Answer: 25, 110, 143Explanation: SMTP (25), POP3 (110), and IMAP (143) are used for email services.Correct Answer: 25, 110, 143Explanation: SMTP (25), POP3 (110), and IMAP (143) are used for email services.12 / 20A technician suspects that a network cable is faulty. What tool should they use to verify it? Wireshark Netstat Cable tester Nslookup Traceroute Correct Answer: Cable testerExplanation: A cable tester verifies cable integrity and connectivity.Correct Answer: Cable testerExplanation: A cable tester verifies cable integrity and connectivity.13 / 20A user reports that they cannot access a shared folder on a file server, but they can browse the internet. Other users can access the folder. What should the technician check? The DNS settings on the file server The switch’s VLAN configuration The user’s web browser cache The user’s permissions on the shared folder The firewall’s NAT settings Correct Answer: The user’s permissions on the shared folderExplanation: If others can access the folder, the issue is likely a permissions-related problem for that user.Correct Answer: The user’s permissions on the shared folderExplanation: If others can access the folder, the issue is likely a permissions-related problem for that user.14 / 20A technician notices intermittent connectivity issues in a warehouse with many wireless access points. What is the most likely cause? Channel overlap Incorrect VLAN configuration Subnet mask mismatch DNS misconfiguration Port mirroring Correct Answer: Channel overlapExplanation: Too many access points on overlapping channels can cause interference and connectivity issues.Correct Answer: Channel overlapExplanation: Too many access points on overlapping channels can cause interference and connectivity issues.15 / 20A company wants to secure remote access to its network using encryption. What technology should they implement? Telnet VPN FTP Proxy server SNMP Correct Answer: VPNExplanation: VPNs encrypt remote connections to provide secure access to the network.Correct Answer: VPNExplanation: VPNs encrypt remote connections to provide secure access to the network.16 / 20A technician is troubleshooting a connectivity issue and finds that a switch port has been disabled due to security policies. What feature likely caused this? VLAN trunking DNS filtering DHCP snooping Port security NAT Correct Answer: Port securityExplanation: Port security disables a switch port if an unauthorized device is connected.Correct Answer: Port securityExplanation: Port security disables a switch port if an unauthorized device is connected.17 / 20A user is unable to print to a network printer but can access other network resources. Other users can print successfully. What is the likely cause? The printer is out of paper The user's workstation has an incorrect printer driver The network switch is faulty The firewall is blocking the printer The printer queue is overloaded Correct Answer: The user's workstation has an incorrect printer driverExplanation: If others can print, the issue is likely related to the user’s local driver or settings.Correct Answer: The user's workstation has an incorrect printer driverExplanation: If others can print, the issue is likely related to the user’s local driver or settings.18 / 20Users report slow performance when accessing cloud applications. What metric should the technician check first? MAC address Subnet mask VLAN ID DNS cache Latency Correct Answer: LatencyExplanation: High latency can cause delays in cloud applications, leading to slow performance.Correct Answer: LatencyExplanation: High latency can cause delays in cloud applications, leading to slow performance.19 / 20A technician needs to identify which devices are generating the most traffic on the network. What tool should they use? Ping Nslookup Traceroute NetFlow Cable tester Correct Answer: NetFlowExplanation: NetFlow analyzes network traffic patterns and identifies high-traffic sources.Correct Answer: NetFlowExplanation: NetFlow analyzes network traffic patterns and identifies high-traffic sources.20 / 20A network technician is troubleshooting a user's workstation that cannot access the internet. The IP address is 192.168.1.55, the subnet mask is 255.255.255.0, and the gateway is 192.168.2.1. What is the most likely issue? DNS misconfiguration Duplicate IP address Incorrect default gateway Faulty NIC Firewall blocking HTTP Correct Answer: Incorrect default gatewayExplanation: The default gateway (192.168.2.1) is on a different subnet than the workstation (192.168.1.x), preventing internet access.Correct Answer: Incorrect default gatewayExplanation: The default gateway (192.168.2.1) is on a different subnet than the workstation (192.168.1.x), preventing internet access.Your score isThe average score is 0% 0% Restart quiz