1) A technician is connecting a desktop PC to a switch using a twisted-pair cable. The distance is less than 50 feet. Which cable type is BEST? a) Cat 3 UTP b) Cat 5e UTP c) Coax RG-6 d) Fiber multimode 2) A small office wants to connect 12 PCs with the ability to manage VLANs. Which device should be installed? a) Hub b) Unmanaged switch c) Managed switch d) Repeater 3)  Which port is used for DNS queries? a) 80 b) 53 c) 110 d) 143 4) A PC technician needs to connect a laptop to a wired network but the laptop has no Ethernet port. What’s the BEST solution? a) Use a USB-to-Ethernet adapter b) Use a coax cable c) Replace the motherboard d) Enable Bluetooth 5) Which type of memory is used for caching between the CPU and RAM? a) DDR4 b) L1/L2 Cache c) VRAM d) EEPROM 6) Which wireless standard operates only in the 5 GHz band and supports speeds up to 1.3 Gbps? a) 802.11n b) 802.11ac c) 802.11g d) 802.11b 7) A technician is replacing a faulty power supply. The PC requires 450W, but the only available PSU is 350W. What should the technician do? a) Install it anyway b) Install and hope usage is low c) Wait and order a higher-wattage PSU d) Use an extension cord 8) Which protocol is used to securely retrieve emails from a server while keeping them on the server? a) POP3 b) IMAP c) SMTP d) FTP 9) A user cannot connect to the wireless network. The technician notices the wireless adapter is disabled in Windows. Which tool should be used to re-enable it? a) Device Manager b) Task Scheduler c) Event Viewer d) Registry Editor 10) Which device operates at Layer 2 of the OSI model and forwards traffic based on MAC addresses? a) Router b) Switch c) Firewall d) Hub 11) A user reports their wired desktop has no internet connection. The NIC lights are off. What is the MOST likely issue? a) Incorrect IP address b) Damaged Ethernet cable c) Wrong DNS server d) Misconfigured subnet mask 12) You are installing a new SOHO wireless router. The user wants the fastest Wi-Fi speed available on modern laptops. Which standard should you enable? a) 802.11g b) 802.11n c) 802.11ac d) 802.11a 13) A user can reach local devices but cannot access websites by name (e.g., google.com). What is the MOST likely issue? a) Incorrect subnet mask b) DHCP failure c) DNS issue d) Bad Ethernet port 14) A small office wants to isolate guest Wi-Fi users from internal resources but still allow them internet access. What is the BEST solution? a) Enable WPA2 encryption b) Configure a DMZ c) Create a guest VLAN d) Install a VPN server 15) Which of the following ports is used by HTTPS? a) 21 b) 22 c) 80 d) 443

CompTIA A+ Networking Practice Questions

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