COMMONG NETWORK UTILITES
Features:
1. Useful for basic troubleshooting
PING:
Features:
1. ability to communicate with hosts using ICMP
•PING sends ICMP echo-requests
•PING expects to receive ICMP echo-replies
Task:
PING some hosts and evaluate the output
1. ping localhost (127.0.0.1)
2. ping -c 3 localhost - sends 3 ICMP echo-requests
Note:
•'ping localhost' performs name resolution using /etc/hosts
•/etc/hosts stores static name-to-IP mappings
•127.0.0.0/8 is fully-reserved to the loopback adapter of ALL IPv4 hosts
3. ping -c 3 192.168.75.199
4. ping -c 3 -i 3 192.168.75.199 - delays PINGs to 3 seconds apart
Note:
•PING defaults to a standard 1-second interval
•Firewall(s) may block ICMP traffic, causing PING to fail
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