1; Copyright (C) Internet Systems Consortium, Inc. ("ISC") 2; 3; This Source Code Form is subject to the terms of the Mozilla Public 4; License, v. 2.0. If a copy of the MPL was not distributed with this 5; file, You can obtain one at http://mozilla.org/MPL/2.0/. 6; 7; See the COPYRIGHT file distributed with this work for additional 8; information regarding copyright ownership. 9 10$ORIGIN . 11$TTL 300 ; 5 minutes 12exampleb IN SOA mname1. . ( 13 1 ; serial 14 20 ; refresh (20 seconds) 15 20 ; retry (20 seconds) 16 1814400 ; expire (3 weeks) 17 3600 ; minimum (1 hour) 18 ) 19exampleb. NS ns3.exampleb. 20ns3.exampleb. A 10.53.0.3 21 22$ORIGIN exampleb. 23a A 10.0.2.1 24b A 10.0.2.2 25c A 10.0.2.3 26d A 10.0.2.4 27e A 10.0.2.5 28f A 10.0.2.6 29g A 10.0.2.7 30h A 10.0.2.8 31