Unix for Advanced Users

13. Networking

• 13.1. What really happens when I telnet to a remote host on my subnet?
  13.1.1. Is the remote hostname all I need to connect? (DNS)
  13.1.2. Is the remote IP number all I need to connect? (ARP)
  13.1.3. What is Ethernet?
  13.1.4. What is TCP/IP?
  13.1.5. What happens at the other end? (/etc/services, inetd, /etc/inetd.conf)
  
• 13.2. What if the host is on a different subnet?
  13.2.1. What's subnetting, subnet mask?
  13.2.2. How is the traffic routed? (RIP)
  
• 13.3. Networking commands:
  13.3.1. arp
  13.3.2. ifconfig
  13.3.3. route
  13.3.4. netstat
  13.3.5. nslookup
  13.3.6. ping
  13.3.7. (traceroute)
  
• 13.4. What is NFS (Network File System)?
• 13.5. Dang, the network has gone south!
  13.5.1. Check the plug!
  13.5.2. Check for network activity.
  13.5.3. Is the interface configured?
  13.5.4. Where can you ping?