1; Copyright (C) Internet Systems Consortium, Inc. ("ISC") 2; 3; SPDX-License-Identifier: MPL-2.0 4; 5; This Source Code Form is subject to the terms of the Mozilla Public 6; License, v. 2.0. If a copy of the MPL was not distributed with this 7; file, you can obtain one at https://mozilla.org/MPL/2.0/. 8; 9; See the COPYRIGHT file distributed with this work for additional 10; information regarding copyright ownership. 11 12$ORIGIN . 13$TTL 300 ; 5 minutes 14exampleb IN SOA mname1. . ( 15 1 ; serial 16 20 ; refresh (20 seconds) 17 20 ; retry (20 seconds) 18 1814400 ; expire (3 weeks) 19 3600 ; minimum (1 hour) 20 ) 21exampleb. NS ns3.exampleb. 22ns3.exampleb. A 10.53.0.3 23 24$ORIGIN exampleb. 25a A 10.0.2.1 26b A 10.0.2.2 27c A 10.0.2.3 28d A 10.0.2.4 29e A 10.0.2.5 30f A 10.0.2.6 31g A 10.0.2.7 32h A 10.0.2.8 33