2 ms·

Large service providers do not disallow ICMP at the network level. TCP/IP relies on ICMP for a number of purposes other than PING (ICMP ECHO), and a network wou

by hhw 14y ago

Large service providers do not disallow ICMP at the network level. TCP/IP relies on ICMP for a number of purposes other than PING (ICMP ECHO), and a network would be broken without it.