diff --git a/network/connection_interface.py b/network/connection_interface.py
new file mode 100644
index 0000000..813ea7d
--- /dev/null
+++ b/network/connection_interface.py
@@ -0,0 +1,27 @@
+from abc import ABC, abstractmethod
+
+class IConnection(ABC):
+
+    @abstractmethod
+    def get_observed_addrs(self):
+        """
+        retrieve observed addresses from underlying transport
+        :return: list of multiaddrs
+        """
+        pass
+
+    @abstractmethod
+    def get_peer_info(self):
+        """
+        retrieve peer info object that the connection connects to
+        :return: a peer info object
+        """
+        pass
+
+    @abstractmethod
+    def set_peer_info(self, peer_info):
+        """
+        :param peer_info: a peer info object that contains info of peer
+        :return: True if successful
+        """
+        pass
diff --git a/network/listener_interface.py b/network/listener_interface.py
new file mode 100644
index 0000000..9398bf9
--- /dev/null
+++ b/network/listener_interface.py
@@ -0,0 +1,31 @@
+from abc import ABC, abstractmethod
+
+class IListener(ABC):
+
+    @abstractmethod
+    def listen(self, multiaddr):
+        """
+        put listener in listening mode and wait for incoming connections
+        :param multiaddr: multiaddr of peer
+        :return: return True if successful
+        """
+        pass
+
+    @abstractmethod
+    def get_addrs(self):
+        """
+        retrieve list of addresses the listener is listening on
+        :return: return list of addrs
+        """
+        pass
+
+    @abstractmethod
+    def close(self, options=None):
+        """
+        close the listener such that no more connections
+        can be open on this transport instance
+        :param options: optional object potential with timeout
+        a timeout value in ms that fires and destroy all connections
+        :return: return True if successful
+        """
+        pass
diff --git a/network/network_interface.py b/network/network_interface.py
index ae805d3..7fb0176 100644
--- a/network/network_interface.py
+++ b/network/network_interface.py
@@ -26,5 +26,5 @@ class INetwork(ABC):
     def listen(self, *args):
         """
         :param *args: one or many multiaddrs to start listening on
-        :return: true if at least one success
+        :return: True if at least one success
         """
diff --git a/network/tcp.py b/network/tcp.py
new file mode 100644
index 0000000..d2a0687
--- /dev/null
+++ b/network/tcp.py
@@ -0,0 +1,54 @@
+import asyncio
+from .transport_interface import ITransport
+from .listener_interface import IListener
+
+class TCP(ITransport):
+
+    def __init__(self):
+        self.multiaddr = None
+
+    class Listener(IListener):
+
+        def listen(self, multiaddr):
+            """
+            put listener in listening mode and wait for incoming connections
+            :param multiaddr: multiaddr of peer
+            :return: return True if successful
+            """
+            pass
+
+        def get_addrs(self):
+            """
+            retrieve list of addresses the listener is listening on
+            :return: return list of addrs
+            """
+            pass
+
+        def close(self, options=None):
+            """
+            close the listener such that no more connections
+            can be open on this transport instance
+            :param options: optional object potential with timeout
+            a timeout value in ms that fires and destroy all connections
+            :return: return True if successful
+            """
+            pass
+
+    def dial(self, multiaddr, options=None):
+        """
+        dial a transport to peer listening on multiaddr
+        :param multiaddr: multiaddr of peer
+        :param options: optional object
+        :return: list of multiaddrs
+        """
+        pass
+
+    def create_listener(self, handler_function, options=None):
+        """
+        create listener on transport
+        :param options: optional object with properties the listener must have
+        :param handler_function: a function called when a new conntion is received
+        that takes a connection as argument which implements interface-connection
+        :return: a listener object that implements listener_interface.py
+        """
+        pass
diff --git a/network/transport_interface.py b/network/transport_interface.py
new file mode 100644
index 0000000..324ea43
--- /dev/null
+++ b/network/transport_interface.py
@@ -0,0 +1,24 @@
+from abc import ABC, abstractmethod
+
+class ITransport(ABC):
+
+    @abstractmethod
+    def dial(self, multiaddr, options=None):
+        """
+        dial a transport to peer listening on multiaddr
+        :param multiaddr: multiaddr of peer
+        :param options: optional object
+        :return: list of multiaddrs
+        """
+        pass
+
+    @abstractmethod
+    def create_listener(self, handler_function, options=None):
+        """
+        create listener on transport
+        :param options: optional object with properties the listener must have
+        :param handler_function: a function called when a new conntion is received
+        that takes a connection as argument which implements interface-connection
+        :return: a listener object that implements listener_interface.py
+        """
+        pass