diff --git a/client/port.h b/client/port.h
index 53842a5..06162a0 100644
--- a/client/port.h
+++ b/client/port.h
@@ -45,6 +45,8 @@ public:
         { return QString().fromStdString(d.name()); }
     const QString description() const 
         { return QString().fromStdString(d.description()); }
+    const QString notes() const 
+        { return QString().fromStdString(d.notes()); }
     AdminStatus adminStatus() 
         { return (d.is_enabled()?AdminEnable:AdminDisable); }
     ControlMode controlMode() 
diff --git a/client/portstatsmodel.cpp b/client/portstatsmodel.cpp
index 1958d8d..72b3d16 100644
--- a/client/portstatsmodel.cpp
+++ b/client/portstatsmodel.cpp
@@ -165,24 +165,23 @@ QVariant PortStatsModel::data(const QModelIndex &index, int role) const
 
 QVariant PortStatsModel::headerData(int section, Qt::Orientation orientation, int role) const
 {
-#ifdef Q_OS_WIN32
-    // TODO(MED): The limitations should be the server's not the client's!
-    // Ideally we shd enhance the protocol to convey limitation(s), if any,
-    // from server to client
     if (role == Qt::ToolTipRole)
     {
         if (orientation == Qt::Horizontal)
         {
-            return QString("<b>Limitation(s)</b>"  
-                    "<p><i>Frames/Bytes Receieved</i>: Includes non Ostinato Tx pkts also (Tx by Ostinato are not included)<br>" 
-                    "<i>Frames/Bytes Sent</i>: Only Ostinato Tx pkts (Tx by others NOT included)</p>" 
-                    "<p>Rx/Tx Rates are derived from the above and hence subject to same limitations</p>"
-                    );
+            QString notes;
+            uint portGroupIdx, portIdx;
+
+            getDomainIndexes(index(0, section), portGroupIdx, portIdx);    
+            notes = pgl->mPortGroups.at(portGroupIdx)->mPorts[portIdx]->notes();
+            if (!notes.isEmpty())
+                return notes;
+            else
+                return QVariant();
         }
         else
             return QVariant();
     }
-#endif
 
     if (role != Qt::DisplayRole)
         return QVariant();
@@ -192,11 +191,7 @@ QVariant PortStatsModel::headerData(int section, Qt::Orientation orientation, in
         uint portGroupIdx, portIdx;
 
         getDomainIndexes(index(0, section), portGroupIdx, portIdx);    
-#ifdef Q_OS_WIN32
-        return QString("Port %1-%2 (*)").arg(portGroupIdx).arg(portIdx);
-#else
         return QString("Port %1-%2").arg(portGroupIdx).arg(portIdx);
-#endif
     }
     else
         return PortStatName.at(section);
diff --git a/common/protocol.proto b/common/protocol.proto
index 42caff1..86ceb59 100644
--- a/common/protocol.proto
+++ b/common/protocol.proto
@@ -15,18 +15,15 @@ message StreamCore {
     }
     
     // Basics
-    optional string    name = 1;
-    optional bool    is_enabled = 2;
-    optional uint32    ordinal = 3;
+    optional string name = 1;
+    optional bool is_enabled = 2;
+    optional uint32 ordinal = 3;
 
     // Frame Length (includes CRC)
-    optional FrameLengthMode    len_mode = 14 [default = e_fl_fixed];
-    optional uint32                frame_len = 15 [default = 64];
-    optional uint32                frame_len_min = 16 [default = 64];
-    optional uint32                frame_len_max = 17 [default = 1518];
-
-    // Currently Selected Protocols
-    //repeated uint32                frame_proto = 20;
+    optional FrameLengthMode len_mode = 14 [default = e_fl_fixed];
+    optional uint32 frame_len = 15 [default = 64];
+    optional uint32 frame_len_min = 16 [default = 64];
+    optional uint32 frame_len_max = 17 [default = 1518];
 }
 
 message StreamControl {
@@ -46,14 +43,14 @@ message StreamControl {
         e_nw_goto_id = 2;
     }
 
-    optional SendUnit    unit = 1 [default = e_su_packets];
-    optional SendMode    mode = 2 [default = e_sm_fixed];
-    optional uint32        num_packets = 3 [default = 1];
-    optional uint32        num_bursts = 4 [default = 1];
-    optional uint32        packets_per_burst = 5 [default = 10];
-    optional NextWhat    next = 6 [default = e_nw_goto_next];
-    optional uint32        packets_per_sec = 7 [default = 1];
-    optional uint32        bursts_per_sec = 8 [default = 1];
+    optional SendUnit unit = 1 [default = e_su_packets];
+    optional SendMode mode = 2 [default = e_sm_fixed];
+    optional uint32 num_packets = 3 [default = 1];
+    optional uint32 num_bursts = 4 [default = 1];
+    optional uint32 packets_per_burst = 5 [default = 10];
+    optional NextWhat next = 6 [default = e_nw_goto_next];
+    optional uint32 packets_per_sec = 7 [default = 1];
+    optional uint32 bursts_per_sec = 8 [default = 1];
 }
 
 message ProtocolId {
@@ -129,7 +126,8 @@ message Port {
     required PortId port_id = 1;
     optional string name = 2;
     optional string description = 3;
-    optional bool is_enabled = 4;
+    optional string notes = 4;
+    optional bool is_enabled = 5;
     optional bool is_exclusive_control = 6;
 }
 
diff --git a/server/pcapport.cpp b/server/pcapport.cpp
index 9d1e4fb..ced12ab 100644
--- a/server/pcapport.cpp
+++ b/server/pcapport.cpp
@@ -2,6 +2,10 @@
 
 #include <QtGlobal>
 
+#ifdef Q_OS_WIN32
+#include <windows.h>
+#endif
+
 pcap_if_t *PcapPort::deviceList_ = NULL;
 
 PcapPort::PcapPort(int id, const char *device)
@@ -40,11 +44,25 @@ PcapPort::PcapPort(int id, const char *device)
 
 void PcapPort::init()
 {
+    QString notes;
+
+    if (!monitorRx_->isDirectional() && !data_.is_exclusive_control())
+        notes.append("<i>Rx Frames/Bytes</i>: Includes non Ostinato Tx pkts also (Tx by Ostinato are not included)<br>");
+
     if (!monitorTx_->isDirectional())
+    {
         transmitter_->useExternalStats(&stats_);
+        notes.append("<i>Tx Frames/Bytes</i>: Only Ostinato Tx pkts (Tx by others NOT included)<br>");
+    }
 
     transmitter_->setHandle(monitorRx_->handle());
 
+    if (!notes.isEmpty())
+        data_.set_notes(QString("<b>Limitation(s)</b>"
+            "<p>%1<br>"
+            "Rx/Tx Rates are also subject to above limitation(s)</p>").
+            arg(notes).toStdString());
+
     monitorRx_->start();
     monitorTx_->start();
 }
@@ -150,6 +168,14 @@ PcapPort::PortTransmitter::PortTransmitter(const char *device)
 {
     char errbuf[PCAP_ERRBUF_SIZE];
 
+#ifdef Q_OS_WIN32
+    LARGE_INTEGER   freq;
+    if (QueryPerformanceFrequency(&freq))
+        ticksFreq_ = freq.QuadPart;
+    else
+        Q_ASSERT_X(false, "PortTransmitter::PortTransmitter",
+                "This Win32 platform does not support performance counter");
+#endif
     returnToQIdx_ = -1;
     stop_ = false;
     stats_ = new AbstractPort::PortStats;
@@ -316,13 +342,29 @@ int PcapPort::PortTransmitter::sendQueueTransmit(pcap_t *p,
 
             if (usec)
             {
-                QThread::usleep(usec);
+                udelay(usec);
                 ts = hdr->ts;
             }
         }
     }
 }
 
+void PcapPort::PortTransmitter::udelay(long usec)
+{
+#ifdef Q_OS_WIN32
+    LARGE_INTEGER tgtTicks;
+    LARGE_INTEGER curTicks;
+
+    QueryPerformanceCounter(&curTicks);
+    tgtTicks.QuadPart = curTicks.QuadPart + (usec*ticksFreq_)/1000000;
+
+    while (curTicks.QuadPart < tgtTicks.QuadPart)
+        QueryPerformanceCounter(&curTicks);
+#else
+    QThread::usleep(usec);
+#endif 
+}
+
 PcapPort::PortCapturer::PortCapturer(const char *device)
 {
     device_ = QString::fromAscii(device);
diff --git a/server/pcapport.h b/server/pcapport.h
index 9f80e57..28e9499 100644
--- a/server/pcapport.h
+++ b/server/pcapport.h
@@ -80,8 +80,10 @@ protected:
         void run();
         void stop();
     private:
+        void udelay(long usec);
         int sendQueueTransmit(pcap_t *p, pcap_send_queue *queue, int sync);
 
+        quint64 ticksFreq_;
         QList<pcap_send_queue*> sendQueueList_;
         int returnToQIdx_;
         bool usingInternalStats_;