Download Full Version 220-1201 CompTIA Exam

The default gateway is the network device responsible for routing traffic from a local computer to destinations outside its subnet. When a new firewall is deployed and intended to manage outbound traffic, client devices must be configured to send packets to this firewall. CompTIA A+ identifies the gateway setting as the key parameter that determines where a workstation sends its external-bound traffic.

By updating the gateway address to point to the new firewall’s internal interface, all internet-bound and off-subnet traffic will now pass through the firewall for filtering, inspection, and routing. This ensures correct traffic flow and enforces security policies.

Changing the VPN settings (A) does not affect local traffic routing unless a VPN tunnel is active. Subnet mask adjustments (C) determine the network size but do not control routing. VLAN settings (D) require switch configuration, not workstation changes, and do not dictate default routing behavior.

Thus, modifying the gateway is the correct and necessary step to route all traffic through the newly implemented firewall.

Port 137 is used by the NetBIOS Name Service. NetBIOS over TCP/IP traditionally uses three ports: UDP port 137 for name registration and name resolution, UDP port 138 for datagram services, and TCP port 139 for session services. Among the provided options, port 137 is therefore the correct NetBIOS port. Port 110 is used by POP3 for retrieving email from a mail server. Port 143 is used by IMAP for accessing and synchronizing email while generally retaining messages on the server. Port 445 is used by modern SMB implementations operating directly over TCP/IP without requiring the older NetBIOS session layer. Although SMB and NetBIOS are historically related in Windows networking, port 445 is classified as direct-hosted SMB rather than a NetBIOS port. Therefore, option B correctly identifies the requested service port.

Thermal printerscreate images using aheated print headon specially coated thermal paper. Vertical white lines indicate thatpart of the heating element is dirty or blocked, preventing heat transfer to the paper. Cleaning the print head (heating element) will restore full functionality.

Option A:Thermal printers donot use ink or toner, so this is not applicable.

Option B:Wrong paper could cause blank output, but consistent vertical lines point to the print head.

Option C:Maintenance kits are typically for laser printers, not thermal printers.

CompTIA A+ Core 1 Exam Objective Reference:

Objective 3.7: Given a scenario, troubleshoot common printer problems.