ping - Test reachability, Tracert/traceroute - A TCP/IP utility that determines the route data takes to get to a particular destination. Can help determine where you are losing packets, nslookup - DNS utility, displays IP address of a hostname or vice versa., ipconfig - Windows TCP/IP utility verifies net settings and connections. Host's IP add., subnet mask, and default gateway, ifconfig - Linux or UNIX TCP/IP utility that verifies net. settings/connections. Similar to Windows ipconfig, tcpdump - utility that is used to obtani packet info from a query string sent to the network interface. Linux but can download for Windows., nmap - Find devices and identify open ports on the network, arp - A utility that supports the Address Resolution Protocol (ARP) service of the TCP/IP protocol suite. It lets the network admin view the ARP cache and add or delete cache entries. It can be used to address problems having to do with specific connections between a workstation and a host., netstat - A utility that can scan the entire network for various ports and the services that are running on them., hostname - view FQDN and IP address of the device (win, Linux, MacOS + others), pathping - A TCP/IP command that provides information about latency and packet loss on a network, dig - linux or unix cmd that will display name server info. Can be used to troubleshoot problems in DNS name resolution. ,

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