Host Resolve

Identifying Network Interfaces

• From the Homework section on D2L, download the source for identifying network interfaces, NetInfo.java.
• Build and execute NetInfo.java on your computer.
• Redirect the output to a file.
• Summarize your results in a text file. Answer the following questions:
  • How many network interfaces does your computer contain?
  • How many interfaces have been assigned an IP address?
  • What is the MAC address of each interface (if present)?
  • What is the Internet address of each interface (if present)?
• Upload your results text file and your summary text file to the Dropbox on D2L.

HostResolve: a host name resolution program

• Write a program that resolves the names of a host to its associated IP address(es).
• By default, the program resolves the name of a host provided as a command line argument to a single address.
• The program must also permit one option, '-a', which directs the program to find all addresses associated with the host name.
• Use the InetAddress.getByName() method to find the default address.
• Use the InetAddress.getAllByName() method to find all addresses for that host name.

Usage: o java HostResolve [-a] [host name]

• The program must write the IP address(es) to standard output.