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Showing posts from November, 2021

public DNS

 Google 8.8.8.8 8.8.4.4 Cisco 208.67.222.222 208.67.220.220 Cloud flare 1.1.1.1 1.0.0.1

tracert command -find duplicate router in line

 Usage: tracert [-d] [-h maximum_hops] [-j host-list] [-w timeout]                [-R] [-S srcaddr] [-4] [-6] target_name Options:     -d                 Do not resolve addresses to hostnames.     -h maximum_hops    Maximum number of hops to search for target.     -j host-list       Loose source route along host-list (IPv4-only).     -w timeout         Wait timeout milliseconds for each reply.     -R                 Trace round-trip path (IPv6-only).     -S srcaddr         Source address to use (IPv6-only).     -4                 Force using IPv4.     -6                 Force using IPv6.