WHOIS port 43finger port 79FTP port 21TELNET port 23smtp port 25HTTP port 80
IP will be sent to Ethernet TCP to send a confirmation message to
Class A range 1.0.0.0 --- 126.0.0.0 - 191.0.0 --- 191.254.0.0c class range 192.0.1.0 --- 223.255.254.0c support 254 hosts
As the use of gold, 14 addresses - (11110000) 2 four times and then subtract 2 - "2 ^ 4 = 16 -" 16-2 = 14 (all zero and all one is reserved IP) Use 255.255.255.240 to use standard 192.168.1.17 for mask IP addresses (00010001) 192.168.1.30 is the last one (00011110)
