.. заглавие: Калкулатор за максимална Ethernet TCP пропускателна способност
.. охлюв: максимална-ethernet-tcp-производителност
.. дата: 2025-12-26 15:00:00 UTC
.. тагове: работа в мрежа, калкулатор, инструмент
.. категория:
.. връзка:
.. описание: Изчислете максималната пропускателна способност на TCP, като отчитате зареждането на Ethernet рамка, размера на TCP прозореца и латентността на мрежата
.. тип: текст
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<div class="calc-container">
<div class="calc-header">
<h2>Калкулатор за максимална Ethernet TCP пропускателна способност</h2>
<p>Изчислете максималната постижима пропускателна способност на TCP в Ethernet мрежи, като вземете предвид режийните рамки, размера на TCP прозореца и латентността на мрежата.</p>
<div class="input-section">
<div class="input-group">
<label for="linkspeed">Скорост на връзката:</label>
<select id="linkspeed">
<option value="10">Ethernet (10 Mbps)</option>
<option value="100">Бърз Ethernet (100 Mbps)</option>
<option selected="" value="1000">Gigabit Ethernet (1000 Mbps)</option>
<option value="10000">10 Gigabit Ethernet (10 Gbps)</option>
<option value="40000">40 Gigabit Ethernet (40 Gbps)</option>
<option value="100000">100 Gigabit Ethernet (100 Gbps)</option>
</select>
</div>
<div class="input-row">
<div class="input-group">
<label for="tcpwindow">TCP размер на прозореца (байтове):</label>
<input id="tcpwindow" placeholder="e.g., 65536" type="text" value="65536"/>
</div>
<div class="input-group">
<label for="latency">Закъснение (милисекунди):</label>
<input id="latency" placeholder="e.g., 1" type="text" value="1"/>
</div>
<div class="input-group">
<label for="frame">Размер на рамката на Ethernet (байтове):</label>
<input id="frame" placeholder="e.g., 1500" type="text" value="1500"/>
</div>
</div>
<button class="calculate-btn" onclick="maxEthernetTCPThroughput()">Изчислете пропускателната способност</button>
</div>
<div class="info-box">
<strong>Относно този калкулатор:</strong>
<ul>
<li><strong>TCP размер на прозореца:</strong>Размерът на прозореца за получаване в байтове (типично: 64KB-16MB)</li>
<li><strong>латентност:</strong>Време за отиване и връщане (RTT) в милисекунди</li>
<li><strong>Размер на рамката:</strong>Максимална единица за предаване (MTU), обикновено 1500 байта</li>
<li><strong>Режийни:</strong>Включва преамбюл на Ethernet (8B), интервал между рамки (12B), заглавки (38B), IP (40B) и TCP (24B)</li>
</ul>
</div>
</div>
<div class="result-section" id="resultSection">
<div class="section-header">
<span class="icon">📊</span>
<span>Изчислени резултати</span>
</div>
<div class="section-content">
<div class="data-row">
<div class="data-label">Максимална TCP пропускателна способност:</div>
<div class="data-value highlight" id="throughputKbps"></div>
</div>
<div class="data-row">
<div class="data-label">Пропускателна способност (Mbps):</div>
<div class="data-value" id="throughputMbps"></div>
</div>
<div class="data-row">
<div class="data-label">Пропускателна способност (Gbps):</div>
<div class="data-value" id="throughputGbps"></div>
</div>
<div class="data-row">
<div class="data-label">Скорост на връзката:</div>
<div class="data-value" id="linkSpeedDisplay"></div>
</div>
<div class="data-row">
<div class="data-label">TCP размер на прозореца:</div>
<div class="data-value" id="tcpWindowDisplay"></div>
</div>
<div class="data-row">
<div class="data-label">Латентност на мрежата (RTT):</div>
<div class="data-value" id="latencyDisplay"></div>
</div>
<div class="data-row">
<div class="data-label">Размер на Ethernet рамката:</div>
<div class="data-value" id="frameDisplay"></div>
</div>
<div class="data-row">
<div class="data-label">Използваеми данни за кадър:</div>
<div class="data-value" id="usableDataDisplay"></div>
</div>
<div class="data-row">
<div class="data-label">Ефективност:</div>
<div class="data-value" id="efficiencyDisplay"></div>
</div>
</div>
</div>
</div>
<script>
function maxEthernetTCPThroughput() {
    // Set variables from input
    var linkSpeed = Number(document.getElementById("linkspeed").value);
    var tcpwindow = document.getElementById("tcpwindow").value;
    var latency = document.getElementById("latency").value;
    var dataFramesize = Number(document.getElementById("frame").value);

    // Convert Link Speed from Mbps to Bps
    var linkSpeedBps = linkSpeed * 1000000;

    // Convert TCP Window from Bytes to Bits
    var tcpwindowbits = tcpwindow*8;

    // Calculate Usable Frame Space
    var framePreamble = 8;
    var frameGap = 12;
    var totalFrame = dataFramesize + framePreamble + frameGap;
    var ethernetOverhead = 38;
    var ethernetData = totalFrame - ethernetOverhead;
    var ipOverhead = 40;
    var tcpOverhead = 24;
    var maxData = ethernetData - ipOverhead - tcpOverhead;

    // Calculate Transfer Speed
    var transferSpeed = tcpwindowbits / ((tcpwindowbits / linkSpeedBps)*(totalFrame/maxData)+latency/1000)/1000;

    // Calculate efficiency
    var efficiency = ((maxData / totalFrame) * 100).toFixed(2);

    // Display results
    document.getElementById("throughputKbps").innerHTML = transferSpeed.toFixed(2) + " Kbps";
    document.getElementById("throughputMbps").innerHTML = (transferSpeed / 1000).toFixed(2) + " Mbps";
    document.getElementById("throughputGbps").innerHTML = (transferSpeed / 1000000).toFixed(4) + " Gbps";

    // Display input parameters
    var linkSpeedName = document.getElementById("linkspeed").options[document.getElementById("linkspeed").selectedIndex].text;
    document.getElementById("linkSpeedDisplay").innerHTML = linkSpeedName;
    document.getElementById("tcpWindowDisplay").innerHTML = Number(tcpwindow).toLocaleString() + " bytes (" + (tcpwindow/1024).toFixed(2) + " KB)";
    document.getElementById("latencyDisplay").innerHTML = latency + " ms";
    document.getElementById("frameDisplay").innerHTML = dataFramesize + " bytes (MTU)";
    document.getElementById("usableDataDisplay").innerHTML = maxData + " bytes per frame (" + totalFrame + " bytes total)";
    document.getElementById("efficiencyDisplay").innerHTML = efficiency + "% (" + maxData + "/" + totalFrame + " bytes)";

    // Show results section
    document.getElementById("resultSection").classList.add("show");

    // Scroll to results
    document.getElementById("resultSection").scrollIntoView({ behavior: 'smooth', block: 'start' });
}

// Add enter key support for inputs
document.addEventListener('DOMContentLoaded', function() {
    var inputs = ['tcpwindow', 'latency', 'frame'];
    inputs.forEach(function(id) {
        document.getElementById(id).addEventListener('keypress', function(e) {
            if (e.key === 'Enter') {
                maxEthernetTCPThroughput();
            }
        });
    });
});
</script>