COMPUTER THREATS SECURITY
WHAT IS A FIREWALL IN NETWORK SECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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You are trying to connect to an FTP server on the Internet from a computer in a school lab.You cannot get a connection. You try on another computer with the same results. The computers in the lab are able to browse the Internet. You are able to connect to this FTP server from home. What could be blocking the connection to the server?
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A layer-2 switch
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A wireless access point
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A firewall
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A layer-2 hub
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Explanation:
Detailed explanation-1: -Accessing files on the FTP server To access files on the FTP server, open a file explorer and type ftp://serverIP . The FTP server asks for a username and password. Enter the username and password (Windows or Active Directory credentials) and click Logon .
Detailed explanation-2: -The FTP error “ECONNREFUSED” indicates a failed connection to the FTP server. If the error occurs, try one of these troubleshooting options: The most common quick fix for this FTP connection error is to change the port number from 21 (default FTP port) to 22 (default SFTP port), or the other way around.
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