Explanation
A duplicate IP address occurs when two devices on the same network have the same IP address assigned to them. This can cause intermittent connection issues, as the network devices may not be able to distinguish between the two conflicting devices. A duplicate IP address can be caused by a visitor manually configuring a static IP address that is already in use by another device on the guest network. The network IP range of
192.168.1.0/28 has only 14 usable host addresses, so the chances of a duplicate IP address are higher than a larger network.
References
1: Troubleshooting IP Configurations - CompTIA Network+ N10-006 - 4.6
2: Troubleshooting Duplicate IP Addresses - CompTIA Network+ N10-005: 2.5
3: Network Address Translation - N10-008 CompTIA Network+ : 1.4

-a Display All connections and listening ports.
-e Display Ethernet statistics. (may be combined with -s)
-n Display addresses and port numbers in Numerical form.
-r Display the Routing table.
-o Display the Owning process ID associated with each connection.
-b Display the exe involved in creating each connection or listening port.*
-v Verbose - use in conjunction with -b, to display the sequence of components involved for all executables.
-p protocol
Show only connections for the protocol specified; can be any of: TCP, UDP, TCPv6 or UDPv6.
If used with the -s option then the following protocols can also be specified: IP, IPv6, ICMP,or ICMPv6.
-s Display per-protocol statistics. By default, statistics are shown for IP, IPv6, ICMP, ICMPv6, TCP, TCPv6, UDP, and UDPv6; (The v6 protocols are not available under 2k and NT4) The -p option can be used to display just a subset of these.