.. otsikko: Maximum Ethernet TCP Throughput Calculator
.. etana: maksimi-ethernet-tcp-läpivirtaus
.. päivämäärä: 2025-12-26 15:00:00 UTC
.. tunnisteet: verkko, laskin, työkalu
.. luokka:
.. linkki:
.. kuvaus: Laske TCP:n maksimiläpäisynopeus Ethernet-kehyksen ylikuormituksen, TCP-ikkunan koon ja verkon latenssin mukaan
.. tyyppi: teksti
<style>
    .calc-container {
        max-width: 900px;
        margin: 20px auto;
        padding: 20px;
    }

    .calc-header {
        margin-bottom: 30px;
        padding: 25px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border-radius: 12px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.1);
        color: white;
    }

    .calc-header h2 {
        margin-top: 0;
        color: white;
        font-size: 28px;
        margin-bottom: 10px;
    }

    .calc-header p {
        margin: 10px 0;
        opacity: 0.95;
        font-size: 15px;
    }

    .input-section {
        margin-top: 20px;
    }

    .input-group {
        margin-bottom: 15px;
    }

    .input-group label {
        display: block;
        margin-bottom: 8px;
        font-weight: 600;
        color: white;
        font-size: 14px;
    }

    .input-group input,
    .input-group select {
        width: 100%;
        padding: 12px;
        font-size: 16px;
        border: 2px solid rgba(255,255,255,0.3);
        border-radius: 6px;
        background: rgba(255,255,255,0.95);
        transition: all 0.3s ease;
        box-sizing: border-box;
    }

    .input-group input:focus,
    .input-group select:focus {
        outline: none;
        border-color: #4CAF50;
        background: white;
        box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
    }

    .input-group input {
        font-family: 'Courier New', monospace;
    }

    .input-row {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 15px;
        margin-bottom: 20px;
    }

    .calculate-btn {
        padding: 14px 35px;
        font-size: 16px;
        background: #4CAF50;
        color: white;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        font-weight: bold;
        transition: all 0.3s ease;
        box-shadow: 0 2px 4px rgba(0,0,0,0.2);
        width: 100%;
        margin-top: 10px;
    }

    .calculate-btn:hover {
        background: #45a049;
        transform: translateY(-1px);
        box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    }

    .calculate-btn:active {
        background: #3d8b40;
        transform: translateY(0);
    }

    .result-section {
        background: white;
        border: 1px solid #e0e0e0;
        border-radius: 8px;
        margin-top: 20px;
        overflow: hidden;
        box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        transition: all 0.3s ease;
        display: none;
    }

    .result-section.show {
        display: block;
    }

    .result-section:hover {
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    }

    .section-header {
        background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
        color: white;
        padding: 15px 20px;
        font-size: 18px;
        font-weight: bold;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .section-header .icon {
        font-size: 20px;
    }

    .section-content {
        padding: 20px;
        background: #fafafa;
    }

    .data-row {
        display: flex;
        margin: 12px 0;
        padding: 10px;
        background: white;
        border-radius: 4px;
        border-left: 3px solid #4CAF50;
    }

    .data-label {
        font-weight: bold;
        color: #555;
        min-width: 220px;
        flex-shrink: 0;
    }

    .data-value {
        color: #333;
        font-family: 'Courier New', monospace;
        word-break: break-word;
    }

    .data-value.highlight {
        color: #4CAF50;
        font-weight: bold;
        font-size: 20px;
    }

    .info-box {
        background: rgba(255,255,255,0.1);
        padding: 15px;
        border-radius: 6px;
        margin-top: 15px;
        font-size: 14px;
    }

    .info-box strong {
        color: white;
        display: block;
        margin-bottom: 8px;
    }

    .info-box ul {
        margin: 8px 0;
        padding-left: 20px;
        opacity: 0.9;
    }

    .info-box li {
        margin: 5px 0;
    }

    @media (max-width: 768px) {
        .input-row {
            grid-template-columns: 1fr;
        }
    }
</style>
<div class="calc-container">
<div class="calc-header">
<h2>Suurin Ethernet TCP -suorituskyvyn laskin</h2>
<p>Laske suurin saavutettavissa oleva TCP-läpäisykyky Ethernet-verkoissa ottaen huomioon kehyksen lisärasituksen, TCP-ikkunan koon ja verkon latenssin.</p>
<div class="input-section">
<div class="input-group">
<label for="linkspeed">Linkin nopeus:</label>
<select id="linkspeed">
<option value="10">Ethernet (10 Mbps)</option>
<option value="100">Fast 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-ikkunan koko (tavuina):</label>
<input id="tcpwindow" placeholder="e.g., 65536" type="text" value="65536"/>
</div>
<div class="input-group">
<label for="latency">Latenssi (millisekuntia):</label>
<input id="latency" placeholder="e.g., 1" type="text" value="1"/>
</div>
<div class="input-group">
<label for="frame">Ethernet-kehyksen koko (tavuina):</label>
<input id="frame" placeholder="e.g., 1500" type="text" value="1500"/>
</div>
</div>
<button class="calculate-btn" onclick="maxEthernetTCPThroughput()">Laske suoritusteho</button>
</div>
<div class="info-box">
<strong>Tietoja tästä laskimesta:</strong>
<ul>
<li><strong>TCP-ikkunan koko:</strong>Vastaanottoikkunan koko tavuina (tyypillinen: 64KB-16MB)</li>
<li><strong>Latenssi:</strong>Meno-paluuaika (RTT) millisekunteina</li>
<li><strong>Kehyksen koko:</strong>Suurin lähetysyksikkö (MTU), tyypillisesti 1500 tavua</li>
<li><strong>Yleiskustannukset:</strong>Sisältää Ethernetin johdannon (8B), kehysten välisen aukon (12B), otsikot (38B), IP:n (40B) ja TCP:n (24B)</li>
</ul>
</div>
</div>
<div class="result-section" id="resultSection">
<div class="section-header">
<span class="icon">📊</span>
<span>Lasketut tulokset</span>
</div>
<div class="section-content">
<div class="data-row">
<div class="data-label">Suurin TCP-suorituskyky:</div>
<div class="data-value highlight" id="throughputKbps"></div>
</div>
<div class="data-row">
<div class="data-label">Suorituskyky (Mbps):</div>
<div class="data-value" id="throughputMbps"></div>
</div>
<div class="data-row">
<div class="data-label">Suorituskyky (Gbps):</div>
<div class="data-value" id="throughputGbps"></div>
</div>
<div class="data-row">
<div class="data-label">Linkin nopeus:</div>
<div class="data-value" id="linkSpeedDisplay"></div>
</div>
<div class="data-row">
<div class="data-label">TCP-ikkunan koko:</div>
<div class="data-value" id="tcpWindowDisplay"></div>
</div>
<div class="data-row">
<div class="data-label">Verkon latenssi (RTT):</div>
<div class="data-value" id="latencyDisplay"></div>
</div>
<div class="data-row">
<div class="data-label">Ethernet-kehyksen koko:</div>
<div class="data-value" id="frameDisplay"></div>
</div>
<div class="data-row">
<div class="data-label">Käytettävät tiedot kehystä kohden:</div>
<div class="data-value" id="usableDataDisplay"></div>
</div>
<div class="data-row">
<div class="data-label">Tehokkuus:</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>