One of the highlights of UNIX is its strong set of networking capabilities. This chapter has covered some aspects of administration of networking. Administration of TCP/IP networking, sendmail administration, and NFS has been discussed, as has NIS. We have talked about web-based network issues such as DNS, firewalls, proxy servers, and web security Because network administration can be quite complicated, complete coverage of this topic cannot be provided here. However, you should be able to use what you’ve learned here to get started in administering your network of UNIX system computers. Although you will find running networks challenging, you will discover that UNIX provides many tools to help you with this task.