diff --git a/src/clients/response.hpp b/src/clients/response.hpp
new file mode 100644
index 0000000..fc49846
--- /dev/null
+++ b/src/clients/response.hpp
@@ -0,0 +1,264 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014, Regents of the University of California.
+ *
+ * This file is part of NDNS (Named Data Networking Domain Name Service).
+ * See AUTHORS.md for complete list of NDNS authors and contributors.
+ *
+ * NDNS is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NDNS is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+ * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NDNS, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NDNS_CLIENTS_RESPONSE_HPP
+#define NDNS_CLIENTS_RESPONSE_HPP
+
+#include "ndns-tlv.hpp"
+#include "ndns-enum.hpp"
+#include "ndns-label.hpp"
+
+
+#include <ndn-cxx/face.hpp>
+#include <ndn-cxx/name.hpp>
+#include <ndn-cxx/data.hpp>
+#include <ndn-cxx/encoding/block-helpers.hpp>
+#include <ndn-cxx/encoding/block.hpp>
+#include <ndn-cxx/meta-info.hpp>
+
+#include <vector>
+
+namespace ndn {
+namespace ndns {
+
+/**
+ * @brief content when update succeeds
+ */
+const Block UPDATE_OK = dataBlock(ndn::tlv::Content, "Update OK", 9);
+
+/**
+ * @brief content when update fails because of the out-dated update message
+ */
+const Block UPDATE_FAIL_OLD_VERSION = dataBlock(ndn::tlv::Content,
+                                                "Update Fails. Error: old version update", 39);
+
+/**
+ * @brief string prefix to judge Update fails or not
+ */
+const std::string UPDATE_FAIL("Update Fails. Error: ");
+
+/**
+ *@brief Default life time of resource record
+ */
+const time::seconds DEFAULT_RR_FRESHNESS_PERIOD(3600);
+
+
+/**
+ * @brief NDNS Response abstraction. Response is used on client side,
+ * while Rrset is used on server side, and Data packet is used during transmission in network.
+ */
+class Response
+{
+public:
+  Response();
+
+  Response(const Name& zone, const name::Component& queryType);
+
+  /**
+   * @brief fill the attributes from Data packet.
+   * @param[in] data Data.getName() must the same hint (if has) and zone as its prefix,
+   * otherwise it's undefined behavior
+   * @return false if Data.getName() does not follow the structure of NDNS Response without
+   * changing any attributes, otherwise return true and fill the attributes
+   */
+  bool
+  fromData(const Name& hint, const Name& zone, const Data& data);
+
+  shared_ptr<Data>
+  toData();
+
+  Response&
+  addRr(const Block& rr);
+
+  /**
+   * @brief add Block which contains string information and its tlv type is ndns::tlv::RrData
+   * Response is service level information, the encoding level abstraction,
+   * i.e., Block is not very convenient.
+   */
+  Response&
+  addRr(const std::string& rr);
+
+  bool
+  removeRr(const Block& rr);
+
+  bool
+  operator==(const Response& other) const;
+
+  bool
+  operator!=(const Response& other) const
+  {
+    return !(*this == other);
+  }
+
+  /**
+   * @brief encode the app-level data
+   */
+  const Block
+  wireEncode() const;
+
+  /**
+   * @brief decode the app-level data
+   */
+  void
+  wireDecode(const Block& wire);
+
+  /**
+   * @brief encode app-level data
+   */
+  template<bool T>
+  size_t
+  wireEncode(EncodingImpl<T> & block) const;
+
+public:
+  ///////////////////////////////////////////////
+  // getter and setter
+
+  const Name&
+  getZone() const
+  {
+    return m_zone;
+  }
+
+  void
+  setZone(const Name& zone)
+  {
+    m_zone = zone;
+  }
+
+  const name::Component&
+  getQueryType() const
+  {
+    return m_queryType;
+  }
+
+  void
+  setQueryType(const name::Component& queryType)
+  {
+    m_queryType = queryType;
+  }
+
+  const Name&
+  getRrLabel() const
+  {
+    return m_rrLabel;
+  }
+
+  void
+  setRrLabel(const Name& rrLabel)
+  {
+    m_rrLabel = rrLabel;
+  }
+
+  void
+  setRrType(const name::Component& rrType)
+  {
+    m_rrType = rrType;
+  }
+
+  const name::Component&
+  getRrType() const
+  {
+    return m_rrType;
+  }
+
+  void
+  setVersion(const name::Component& version)
+  {
+    m_version = version;
+  }
+
+  const name::Component&
+  getVersion() const
+  {
+    return m_version;
+  }
+
+  void
+  setNdnsType(NdnsType ndnsType)
+  {
+    m_ndnsType = ndnsType;
+  }
+
+  const NdnsType
+  getNdnsType() const
+  {
+    return m_ndnsType;
+  }
+
+  const Block&
+  getAppContent() const
+  {
+    return m_appContent;
+  }
+
+  void
+  setAppContent(const Block& block);
+
+  const std::vector<Block>&
+  getRrs() const
+  {
+    return m_rrs;
+  }
+
+  void
+  setRrs(const std::vector<Block>& rrs)
+  {
+    m_rrs = rrs;
+  }
+
+  time::seconds
+  getFreshnessPeriod() const
+  {
+    return m_freshnessPeriod;
+  }
+
+  void
+  setFreshnessPeriod(time::seconds freshnessPeriod)
+  {
+    m_freshnessPeriod = freshnessPeriod;
+  }
+
+private:
+  Name m_zone;
+  name::Component m_queryType;
+  Name m_rrLabel;
+  name::Component m_rrType;
+  name::Component m_version;
+
+  NdnsType m_ndnsType;
+  time::seconds m_freshnessPeriod;
+
+  /**
+   * @brief App content. Be valid only for NDNS-NULL Response
+   */
+  Block m_appContent;
+
+  /**
+   * @brief Content of Resource Record. Be valid only when this is not a NDNS-NULL Response
+   */
+  std::vector<Block> m_rrs;
+};
+
+std::ostream&
+operator<<(std::ostream& os, const Response& response);
+
+} // namespace ndns
+} // namespace ndn
+
+#endif // NDNS_CLIENTS_RESPONSE_HPP