<html><head></head><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:16px"><div id="yui_3_16_0_1_1449450934881_26824"><span id="yui_3_16_0_1_1449450934881_26823">Hello Alex,</span></div><div id="yui_3_16_0_1_1449450934881_26876" dir="ltr"><span id="yui_3_16_0_1_1449450934881_26875">I would like to say thanks for your guiding. actually my current scenario is wired but I want that each node can consider credibility for each neighbor ( the nodes which send message to it directly). for this reason, I consider credibility for each face that packet received from it . I am wondering that with consider credibility for each face , it can be equal to each neighbor.?however, I have not changed NetDeviceFace . I should change default to consider unicast? if I should change , how can I change it.</span></div><div id="yui_3_16_0_1_1449450934881_26964" dir="ltr"><span id="yui_3_16_0_1_1449450934881_26975">I am looking forward to hearing you</span></div><div id="yui_3_16_0_1_1449450934881_26984" dir="ltr"><span id="yui_3_16_0_1_1449450934881_26983">thanks in advance</span></div><div id="yui_3_16_0_1_1449450934881_26986" dir="ltr"><span>best regards</span></div> <br><div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: times new roman, new york, times, serif; font-size: 16px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font face="Arial" size="2"> On Tuesday, December 8, 2015 11:23 AM, Alex Afanasyev <aa@cs.ucla.edu> wrote:<br></font></div> <br><br> <div class="y_msg_container"><div id="yiv1461298477"><div><br class="yiv1461298477" clear="none"><div><div class="yiv1461298477yqt6987467222" id="yiv1461298477yqt97787"><blockquote class="yiv1461298477" type="cite"><div class="yiv1461298477">On Dec 7, 2015, at 3:14 PM, Zeinab <<a class="yiv1461298477" href="mailto:z.rezaiefar@yahoo.com" target="_blank" rel="nofollow" shape="rect" ymailto="mailto:z.rezaiefar@yahoo.com">z.rezaiefar@yahoo.com</a>> wrote:</div><br class="yiv1461298477Apple-interchange-newline" clear="none"></blockquote><blockquote class="yiv1461298477" type="cite"><div class="yiv1461298477"><div class="yiv1461298477"><div class="yiv1461298477"><div class="yiv1461298477"><div class="yiv1461298477" id="yiv1461298477yui_3_16_0_1_1449450934881_6934" dir="ltr"><font class="yiv1461298477"><span class="yiv1461298477">Hello every one,</span></font></div></div></div></div></div></blockquote><br class="yiv1461298477" clear="none"><blockquote class="yiv1461298477" type="cite"><div class="yiv1461298477"><span class="yiv1461298477">I am wondering if ndn does not use any information of users for sending Interest message, how this network deliver data to the user. </span><span class="yiv1461298477">Moreover, I would like to say that the Data message is passed the reverse path that interest message is received and each router saves the interface from where it receives this interest message. any how, if more than one user is connected to one interface ( for example in wireless network), the router broadcasts data message to all of them? if this can be happened, how they can control behavior of user and block the malicious user ?</span></div></blockquote><blockquote class="yiv1461298477" type="cite"><div class="yiv1461298477"><span class="yiv1461298477">Any help will be appreciated </span><br class="yiv1461298477" clear="none"><span class="yiv1461298477">thanks in advance</span><br class="yiv1461298477" clear="none"><div class="yiv1461298477"><div class="yiv1461298477"><div class="yiv1461298477"><div class="yiv1461298477" id="yiv1461298477yui_3_16_0_1_1449450934881_7040" dir="ltr"><font class="yiv1461298477"><span class="yiv1461298477">best regards</span></font></div></div></div></div></div></blockquote></div><br class="yiv1461298477" clear="none"></div><div>Hi Zeinab,</div><div><br class="yiv1461298477" clear="none"></div><div>I don't have a single answer to your question. NFD support multiple modes of the forwarding data back, depending on how exactly users deliver interest packets to the router. Specifically, which face has been used: if interest was sent/received using multicast face, then the data packet is multicasted back too. If individual users send interest packets using unicast faces (e.g., UdpFace), then answer is unicasted to each requester. We also have in works modification to the multicast face, which would optionally allow unicasting of data packets (by recording and then using lower layer addressing). This could also include the option to ignore specific senders (or whitelist specific senders), though this may not be a very reliable mechanism.</div><div><br class="yiv1461298477" clear="none"></div><div>The default behavior in ndnSIM to use NetDeviceFace, which effectively is a multicast face. If in your simulation scenario you're using wireless network, then the response is multicasted/broadcasted.</div><div><br class="yiv1461298477" clear="none"></div><div>---</div><div>Alex</div><div><br class="yiv1461298477" clear="none"></div></div></div><br><br></div> </div> </div> </div></div></body></html>