TELECOMMUNICATIONS SYSTEMS
HOW STAR BUS RING MESH TOPOLOGY CONNECT COMPUTER NETWORKS IN ORGANIZATIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Work on each individually
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Work on all of them at the same time
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Work on one every other minute
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Work on
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Detailed explanation-1: -You can only have one application listening on the same port at one time. Now if you had 2 network cards, you could have one application listen on the first IP and the second one on the second IP using the same port number. For UDP (Multicasts), multiple applications can subscribe to the same port.
Detailed explanation-2: -When scanning unfiltered systems, open and closed ports will both return a RST packet. Nmap then labels them as unfiltered, meaning that they are reachable by the ACK packet.
Detailed explanation-3: -Scanning specific port ranges There are several ways of using the Nmap-p option: Port list separated by commas: $ nmap-p80, 443 localhost. Port range denoted with hyphens: $ nmap-p1-100 localhost. Alias for all ports from 1 to 65535: # nmap-p-localhost.
Detailed explanation-4: -One of the simplest ways to check for open ports is to use NetStat.exe. You can find this tool in the System32 folder on Windows 10. With NetStat, you can see open ports or ports that a specific host uses. Netstat is short for network statistics.