diff --git a/example/src/main/java/io/netty/example/dns/dot/DoTClient.java b/example/src/main/java/io/netty/example/dns/dot/DoTClient.java
new file mode 100644
index 0000000000..a5565e4129
--- /dev/null
+++ b/example/src/main/java/io/netty/example/dns/dot/DoTClient.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you under the Apache License,
+ * version 2.0 (the "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at:
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+package io.netty.example.dns.dot;
+
+import io.netty.bootstrap.Bootstrap;
+import io.netty.buffer.ByteBufUtil;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelPipeline;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioSocketChannel;
+import io.netty.channel.SimpleChannelInboundHandler;
+
+import io.netty.handler.codec.dns.DefaultDnsQuestion;
+import io.netty.handler.codec.dns.DefaultDnsResponse;
+import io.netty.handler.codec.dns.DnsQuestion;
+import io.netty.handler.codec.dns.DnsQuery;
+import io.netty.handler.codec.dns.DefaultDnsQuery;
+import io.netty.handler.codec.dns.DnsOpCode;
+import io.netty.handler.codec.dns.DnsRecord;
+import io.netty.handler.codec.dns.DnsSection;
+import io.netty.handler.codec.dns.DnsRecordType;
+import io.netty.handler.codec.dns.DnsRawRecord;
+import io.netty.handler.codec.dns.TcpDnsQueryEncoder;
+import io.netty.handler.codec.dns.TcpDnsResponseDecoder;
+import io.netty.handler.ssl.SslContext;
+import io.netty.handler.ssl.SslContextBuilder;
+import io.netty.util.NetUtil;
+
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+public final class DoTClient {
+    private static final String QUERY_DOMAIN = "www.example.com";
+    private static final int DNS_SERVER_PORT = 853;
+    private static final String DNS_SERVER_HOST = "8.8.8.8";
+
+    private DoTClient() {
+    }
+
+    private static void handleQueryResp(DefaultDnsResponse msg) {
+        if (msg.count(DnsSection.QUESTION) > 0) {
+            DnsQuestion question = msg.recordAt(DnsSection.QUESTION, 0);
+            System.out.printf("name: %s%n", question.name());
+        }
+        for (int i = 0, count = msg.count(DnsSection.ANSWER); i < count; i++) {
+            DnsRecord record = msg.recordAt(DnsSection.ANSWER, i);
+            if (record.type() == DnsRecordType.A) {
+                //just print the IP after query
+                DnsRawRecord raw = (DnsRawRecord) record;
+                System.out.println(NetUtil.bytesToIpAddress(ByteBufUtil.getBytes(raw.content())));
+            }
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        EventLoopGroup group = new NioEventLoopGroup();
+        try {
+            final SslContext sslContext = SslContextBuilder.forClient()
+                    .protocols("TLSv1.3", "TLSv1.2")
+                    .build();
+
+            Bootstrap b = new Bootstrap();
+            b.group(group)
+                    .channel(NioSocketChannel.class)
+                    .handler(new ChannelInitializer<SocketChannel>() {
+                        @Override
+                        protected void initChannel(SocketChannel ch) {
+                            ChannelPipeline p = ch.pipeline();
+                            p.addLast(sslContext.newHandler(ch.alloc(), DNS_SERVER_HOST, DNS_SERVER_PORT))
+                                    .addLast(new TcpDnsQueryEncoder())
+                                    .addLast(new TcpDnsResponseDecoder())
+                                    .addLast(new SimpleChannelInboundHandler<DefaultDnsResponse>() {
+                                        @Override
+                                        protected void channelRead0(ChannelHandlerContext ctx, DefaultDnsResponse msg) {
+                                            try {
+                                                handleQueryResp(msg);
+                                            } finally {
+                                                ctx.close();
+                                            }
+                                        }
+                                    });
+                        }
+                    });
+            final Channel ch = b.connect(DNS_SERVER_HOST, DNS_SERVER_PORT).sync().channel();
+
+            int randomID = new Random().nextInt(60000 - 1000) + 1000;
+            DnsQuery query = new DefaultDnsQuery(randomID, DnsOpCode.QUERY)
+                    .setRecord(DnsSection.QUESTION, new DefaultDnsQuestion(QUERY_DOMAIN, DnsRecordType.A));
+            ch.writeAndFlush(query).sync();
+            boolean success = ch.closeFuture().await(10, TimeUnit.SECONDS);
+            if (!success) {
+                System.err.println("dns query timeout!");
+                ch.close().sync();
+            }
+        } finally {
+            group.shutdownGracefully();
+        }
+    }
+}
diff --git a/example/src/main/java/io/netty/example/dns/tcp/TcpDnsClient.java b/example/src/main/java/io/netty/example/dns/tcp/TcpDnsClient.java
new file mode 100644
index 0000000000..2530cd62eb
--- /dev/null
+++ b/example/src/main/java/io/netty/example/dns/tcp/TcpDnsClient.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2020 The Netty Project
+ *
+ * The Netty Project licenses this file to you under the Apache License,
+ * version 2.0 (the "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at:
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+package io.netty.example.dns.tcp;
+
+import io.netty.bootstrap.Bootstrap;
+import io.netty.buffer.ByteBufUtil;
+
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelPipeline;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioSocketChannel;
+import io.netty.channel.SimpleChannelInboundHandler;
+
+import io.netty.handler.codec.dns.DefaultDnsQuestion;
+import io.netty.handler.codec.dns.DefaultDnsResponse;
+import io.netty.handler.codec.dns.DnsQuestion;
+import io.netty.handler.codec.dns.DnsQuery;
+import io.netty.handler.codec.dns.DefaultDnsQuery;
+import io.netty.handler.codec.dns.DnsOpCode;
+import io.netty.handler.codec.dns.DnsRecord;
+import io.netty.handler.codec.dns.DnsSection;
+import io.netty.handler.codec.dns.DnsRecordType;
+import io.netty.handler.codec.dns.DnsRawRecord;
+import io.netty.handler.codec.dns.TcpDnsQueryEncoder;
+import io.netty.handler.codec.dns.TcpDnsResponseDecoder;
+import io.netty.util.NetUtil;
+
+import java.util.Random;
+import java.util.concurrent.TimeUnit;
+
+public final class TcpDnsClient {
+    private static final String QUERY_DOMAIN = "www.example.com";
+    private static final int DNS_SERVER_PORT = 53;
+    private static final String DNS_SERVER_HOST = "8.8.8.8";
+
+    private TcpDnsClient() {
+    }
+
+    private static void handleQueryResp(DefaultDnsResponse msg) {
+        if (msg.count(DnsSection.QUESTION) > 0) {
+            DnsQuestion question = msg.recordAt(DnsSection.QUESTION, 0);
+            System.out.printf("name: %s%n", question.name());
+        }
+        for (int i = 0, count = msg.count(DnsSection.ANSWER); i < count; i++) {
+            DnsRecord record = msg.recordAt(DnsSection.ANSWER, i);
+            if (record.type() == DnsRecordType.A) {
+                //just print the IP after query
+                DnsRawRecord raw = (DnsRawRecord) record;
+                System.out.println(NetUtil.bytesToIpAddress(ByteBufUtil.getBytes(raw.content())));
+            }
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        EventLoopGroup group = new NioEventLoopGroup();
+        try {
+            Bootstrap b = new Bootstrap();
+            b.group(group)
+                    .channel(NioSocketChannel.class)
+                    .handler(new ChannelInitializer<SocketChannel>() {
+                        @Override
+                        protected void initChannel(SocketChannel ch) {
+                            ChannelPipeline p = ch.pipeline();
+                            p.addLast(new TcpDnsQueryEncoder())
+                                    .addLast(new TcpDnsResponseDecoder())
+                                    .addLast(new SimpleChannelInboundHandler<DefaultDnsResponse>() {
+                                        @Override
+                                        protected void channelRead0(ChannelHandlerContext ctx, DefaultDnsResponse msg) {
+                                            try {
+                                                handleQueryResp(msg);
+                                            } finally {
+                                                ctx.close();
+                                            }
+                                        }
+                                    });
+                        }
+                    });
+
+            final Channel ch = b.connect(DNS_SERVER_HOST, DNS_SERVER_PORT).sync().channel();
+
+            int randomID = new Random().nextInt(60000 - 1000) + 1000;
+            DnsQuery query = new DefaultDnsQuery(randomID, DnsOpCode.QUERY)
+                    .setRecord(DnsSection.QUESTION, new DefaultDnsQuestion(QUERY_DOMAIN, DnsRecordType.A));
+            ch.writeAndFlush(query).sync();
+            boolean success = ch.closeFuture().await(10, TimeUnit.SECONDS);
+            if (!success) {
+                System.err.println("dns query timeout!");
+                ch.close().sync();
+            }
+        } finally {
+            group.shutdownGracefully();
+        }
+    }
+}