net address
7.Furthermore, this paper introduces three different network architectures which are Single system, Bastion firewall screening subnet and the net work with DMZ (demilitarized Zone)defending network, elaboratess theories of NAT (Network address translation) and DMZ(Demilitarized Zone), with the practical examples based on DNS(Domain Name Service).
8.Following RFC2571-RFC2575 (SNMP v3), RFC2553 and RFC 2292, by analyzing NET-SNMP package, the method of transplanting IPv4 program is discussed by analyzing the change of address express and main data structure while SNMPvS transforms from IPv4 to IPv6. The analysis of the change of performance is provided.
10.NetBEUI and IPX/SPX need no setup, but TCP/IP requires IP address, sub-net mask, default gateway and host name.

