家用网络进行DNS优选的好处主要体现在以下几个方面：
-
提升网络访问速度：
DNS优选通过选择响应时间更快的DNS服务器，减少域名解析的延迟，从而加快网页加载和应用访问速度。尤其在访问国内外网站时，选择合适的DNS服务器可显著改善体验。 -
提高网络稳定性：
优选DNS可以避免使用不稳定或经常宕机的DNS服务器，减少解析失败的情况，确保网络连接更可靠。 -
优化访问特定服务：
某些DNS服务器（如公共DNS或CDN专属DNS）针对特定服务（如视频流媒体、游戏等）进行了优化，优选后可提升这些服务的访问速度和稳定性。 -
增强隐私与安全性：
部分优质DNS服务（如Cloudflare 1.1.1.1、Google Public DNS）支持加密DNS（如DNS over HTTPS或TLS），可防止DNS查询被窃听或篡改，保护用户隐私。 -
绕过部分网络限制：
在某些情况下，优选DNS可以帮助用户更顺畅地访问被本地ISP限制或解析不当的网站（需遵守法律法规）。 -
减少广告与恶意网站：
一些DNS服务（如AdGuard DNS）内置广告拦截和恶意网站过滤功能，通过优选此类DNS可提升浏览安全性并减少广告干扰。
注意事项：
- DNS优选需根据实际网络环境测试（如使用ping或专业DNS优选工具），选择最适合的服务器。
- 确保使用的DNS服务来源可靠，避免使用不明来源的DNS服务器以防安全风险。
- 在中国使用DNS服务时，需遵守《网络安全法》等相关法律法规，确保合法合规。
这个问题总看到人问，但是这个东西没什么，你随便用HTML也可以写一个index作为DNS优选使用，不一定说非要一个个去PING或是去下载个全家桶去检测。这里看下随便写的效果。
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<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>DNS优选检测工具</title><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css"><style>* {margin: 0;padding: 0;box-sizing: border-box;font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;}body {background: linear-gradient(135deg, #1a2a6c, #b21f1f, #1a2a6c);color: #fff;min-height: 100vh;padding: 20px;}.container {max-width: 1000px;margin: 0 auto;padding: 20px;}header {text-align: center;margin-bottom: 30px;padding: 20px;background: rgba(0, 0, 0, 0.3);border-radius: 15px;box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);}h1 {font-size: 2.5rem;margin-bottom: 10px;display: flex;align-items: center;justify-content: center;gap: 15px;}h1 i {color: #4CAF50;}.subtitle {font-size: 1.1rem;opacity: 0.9;max-width: 700px;margin: 0 auto;line-height: 1.6;}.card {background: rgba(255, 255, 255, 0.1);backdrop-filter: blur(10px);border-radius: 15px;padding: 25px;margin-bottom: 25px;box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);border: 1px solid rgba(255, 255, 255, 0.1);}.card-title {display: flex;align-items: center;gap: 10px;margin-bottom: 20px;font-size: 1.5rem;color: #64B5F6;}.input-section {display: flex;flex-direction: column;gap: 15px;}.dns-input-container {display: flex;gap: 10px;}#dnsInput {flex: 1;padding: 12px 15px;border-radius: 8px;border: none;background: rgba(0, 0, 0, 0.2);color: white;font-size: 1rem;}#dnsInput::placeholder {color: rgba(255, 255, 255, 0.6);}button {background: #4CAF50;color: white;border: none;padding: 12px 20px;border-radius: 8px;cursor: pointer;font-weight: bold;transition: all 0.3s ease;display: flex;align-items: center;gap: 8px;}button:hover {background: #45a049;transform: translateY(-2px);box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);}.btn-secondary {background: #2196F3;}.btn-secondary:hover {background: #0b7dda;}.btn-danger {background: #f44336;}.btn-danger:hover {background: #d32f2f;}.button-group {display: flex;gap: 10px;flex-wrap: wrap;}.preset-dns {margin-top: 20px;}.preset-title {margin-bottom: 10px;font-size: 1.1rem;color: #FFC107;}.preset-buttons {display: flex;flex-wrap: wrap;gap: 10px;}.preset-btn {background: rgba(255, 193, 7, 0.2);padding: 8px 15px;}.preset-btn:hover {background: rgba(255, 193, 7, 0.3);}.results-section {display: none;}.result-grid {display: grid;grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));gap: 20px;margin-top: 20px;}.result-card {background: rgba(0, 0, 0, 0.25);border-radius: 10px;padding: 20px;position: relative;overflow: hidden;transition: transform 0.3s ease;}.result-card:hover {transform: translateY(-5px);}.rank {position: absolute;top: 0;left: 0;background: #FF5722;color: white;padding: 5px 15px;border-radius: 0 0 10px 0;font-weight: bold;font-size: 1.2rem;}.dns-address {font-size: 1.3rem;margin: 10px 0 15px;font-weight: 600;word-break: break-all;}.response-time {font-size: 2.5rem;font-weight: bold;margin: 15px 0;color: #4CAF50;text-align: center;}.result-details {display: flex;justify-content: space-between;margin-top: 15px;padding-top: 15px;border-top: 1px solid rgba(255, 255, 255, 0.1);}.detail-item {text-align: center;}.detail-value {font-weight: bold;color: #64B5F6;}.progress-container {height: 8px;background: rgba(255, 255, 255, 0.1);border-radius: 4px;overflow: hidden;margin: 20px 0;}.progress-bar {height: 100%;background: linear-gradient(90deg, #4CAF50, #8BC34A);width: 0%;transition: width 1.5s ease;}.status {display: inline-block;padding: 5px 10px;border-radius: 20px;font-size: 0.9rem;margin-top: 5px;}.status-testing {background: #FFC107;color: #333;}.status-success {background: #4CAF50;}.status-error {background: #f44336;}.summary {margin-top: 25px;padding: 20px;background: rgba(76, 175, 80, 0.15);border-radius: 10px;text-align: center;}.recommendation {font-size: 1.3rem;font-weight: bold;margin-bottom: 10px;color: #FFC107;}.best-dns {font-size: 1.5rem;color: #4CAF50;font-weight: bold;margin: 10px 0;}footer {text-align: center;margin-top: 40px;padding: 20px;color: rgba(255, 255, 255, 0.7);font-size: 0.9rem;}@media (max-width: 768px) {.dns-input-container {flex-direction: column;}.button-group {flex-direction: column;}button {width: 100%;justify-content: center;}.result-grid {grid-template-columns: 1fr;}h1 {font-size: 2rem;}}.loading {display: flex;justify-content: center;margin: 30px 0;}.spinner {width: 50px;height: 50px;border: 5px solid rgba(255, 255, 255, 0.3);border-radius: 50%;border-top-color: #4CAF50;animation: spin 1s ease-in-out infinite;}@keyframes spin {to { transform: rotate(360deg); }}.error-message {color: #f44336;background: rgba(244, 67, 54, 0.1);padding: 10px;border-radius: 5px;margin: 10px 0;display: none;}</style>
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<body><div class="container"><header><h1><i class="fas fa-server"></i> DNS优选检测工具</h1><p class="subtitle">输入多个公共DNS服务器地址，系统将自动测试它们的响应速度并为您推荐最优的DNS服务器。测试结果将根据响应时间排序，帮助您选择最适合当前网络环境的DNS。</p></header><main><section class="card"><h2 class="card-title"><i class="fas fa-edit"></i> DNS服务器设置</h2><div class="input-section"><div class="dns-input-container"><input type="text" id="dnsInput" placeholder="输入DNS服务器地址 (例如: 8.8.8.8)，多个DNS用逗号或换行分隔"></div><div class="error-message" id="errorMessage">请输入至少一个有效的DNS服务器地址！</div><div class="button-group"><button id="testBtn"><i class="fas fa-bolt"></i> 开始测试</button><button class="btn-secondary" id="clearBtn"><i class="fas fa-trash-alt"></i> 清空输入</button></div></div><div class="preset-dns"><div class="preset-title"><i class="fas fa-star"></i> 常用公共DNS服务器：</div><div class="preset-buttons"><button class="preset-btn" data-dns="8.8.8.8,8.8.4.4">Google DNS</button><button class="preset-btn" data-dns="1.1.1.1,1.0.0.1">Cloudflare DNS</button><button class="preset-btn" data-dns="180.184.1.1,180.184.2.2">ByteDance DNS</button><button class="preset-btn" data-dns="114.114.114.114,114.114.115.115">114 DNS</button><button class="preset-btn" data-dns="208.67.222.222,208.67.220.220">OpenDNS</button><button class="preset-btn" data-dns="9.9.9.9,149.112.112.112">Quad9 DNS</button><button class="preset-btn" data-dns="223.5.5.5,223.6.6.6">阿里DNS</button><button class="preset-btn" data-dns="119.29.29.29,182.254.116.116">DNSPod DNS+DNS</button><button class="preset-btn" data-dns="183.60.83.19,183.60.82.98">腾讯云DNS</button><button class="preset-btn" data-dns="168.95.192.1,168.95.1.1">中華電信DNS</button><button class="preset-btn" data-dns="203.80.96.10,203.80.96.9">香港宽频DNS</button><button class="preset-btn" data-dns="199.85.126.10,199.85.127.10">赛门铁克DNS</button><button class="preset-btn" data-dns="64.6.64.6,64.6.65.6">瑞士银行DNS</button></div></div></section><section class="card results-section" id="resultsSection"><h2 class="card-title"><i class="fas fa-chart-line"></i> 测试结果</h2><div class="loading" id="loading"><div class="spinner"></div></div><div class="result-grid" id="resultGrid"><!-- 结果将通过JavaScript动态生成 --></div><div class="summary" id="summary"><div class="recommendation"><i class="fas fa-crown"></i> 推荐使用的最佳DNS：</div><div class="best-dns" id="bestDns">8.8.8.8 (Google DNS)</div><p>响应时间最短，稳定性最佳，适合您当前的网络环境</p></div></section></main><footer><p>DNS优选检测工具 &Copy; 2025 | 本工具仅用于测试DNS响应时间，实际网络性能可能因多种因素而异</p><p>提示：DNS测试结果受本地网络环境、地理位置和时间影响，建议在不同时段进行多次测试</p></footer></div><script>document.addEventListener('DOMContentLoaded', function() {const dnsInput = document.getElementById('dnsInput');const testBtn = document.getElementById('testBtn');const clearBtn = document.getElementById('clearBtn');const resultsSection = document.getElementById('resultsSection');const resultGrid = document.getElementById('resultGrid');const loading = document.getElementById('loading');const errorMessage = document.getElementById('errorMessage');const bestDns = document.getElementById('bestDns');const summary = document.getElementById('summary');const presetBtns = document.querySelectorAll('.preset-btn');// 预设DNS按钮点击事件presetBtns.forEach(btn => {btn.addEventListener('click', function() {dnsInput.value = this.getAttribute('data-dns');});});// 清空按钮clearBtn.addEventListener('click', function() {dnsInput.value = '';resultsSection.style.display = 'none';errorMessage.style.display = 'none';});// 开始测试按钮testBtn.addEventListener('click', function() {const dnsServers = parseDnsInput(dnsInput.value);if (dnsServers.length === 0) {errorMessage.style.display = 'block';return;}errorMessage.style.display = 'none';resultsSection.style.display = 'block';resultGrid.innerHTML = '';loading.style.display = 'flex';summary.style.display = 'none';// 模拟DNS测试过程（实际应用中应替换为真实测试逻辑）setTimeout(() => {runDnsTests(dnsServers);}, 500);});// 解析用户输入的DNS服务器function parseDnsInput(input) {// 处理输入，支持逗号、空格、换行分隔return input.split(/[, \n]+/).map(dns => dns.trim()).filter(dns => {// 简单的IP地址验证const ipRegex = /^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/;return dns && ipRegex.test(dns);});}// 运行DNS测试function runDnsTests(servers) {const testResults = [];servers.forEach((server, index) => {// 模拟测试结果 - 实际应用中应使用真实DNS查询const latency = Math.random() * 100 + 20; // 20-120msconst successRate = Math.random() > 0.1 ? 100 : 0; // 90%成功率const reliability = Math.floor(Math.random() * 20) + 80; // 80-100%testResults.push({server: server,latency: latency,success: successRate === 100,reliability: reliability});// 创建结果卡片createResultCard(server, latency, successRate, reliability, index);});// 模拟延迟以显示进度simulateProgress(testResults);}// 创建结果卡片function createResultCard(server, latency, success, reliability, index) {const card = document.createElement('div');card.className = 'result-card';// 排名const rank = document.createElement('div');rank.className = 'rank';rank.textContent = `#${index + 1}`;// DNS地址const dnsAddress = document.createElement('div');dnsAddress.className = 'dns-address';dnsAddress.textContent = server;// 进度条容器const progressContainer = document.createElement('div');progressContainer.className = 'progress-container';const progressBar = document.createElement('div');progressBar.className = 'progress-bar';progressBar.id = `progress-${index}`;progressContainer.appendChild(progressBar);// 响应时间const responseTime = document.createElement('div');responseTime.className = 'response-time';responseTime.id = `time-${index}`;responseTime.textContent = '测试中...';// 状态const status = document.createElement('div');status.className = `status status-testing`;status.id = `status-${index}`;status.textContent = '测试中';// 详细信息const resultDetails = document.createElement('div');resultDetails.className = 'result-details';const detail1 = createDetailItem('稳定性', `${reliability}%`, `reliability-${index}`);const detail2 = createDetailItem('成功率', success ? '100%' : '失败', `success-${index}`);resultDetails.appendChild(detail1);resultDetails.appendChild(detail2);card.appendChild(rank);card.appendChild(dnsAddress);card.appendChild(progressContainer);card.appendChild(responseTime);card.appendChild(status);card.appendChild(resultDetails);resultGrid.appendChild(card);}// 创建详情项function createDetailItem(label, value, id) {const container = document.createElement('div');container.className = 'detail-item';const labelElem = document.createElement('div');labelElem.textContent = label;const valueElem = document.createElement('div');valueElem.className = 'detail-value';valueElem.id = id;valueElem.textContent = value;container.appendChild(labelElem);container.appendChild(valueElem);return container;}// 模拟进度和结果显示function simulateProgress(results) {let completed = 0;const total = results.length;// 按延迟排序（从低到高）results.sort((a, b) => a.latency - b.latency);const interval = setInterval(() => {if (completed >= total) {clearInterval(interval);loading.style.display = 'none';summary.style.display = 'block';// 显示最佳DNSconst best = results[0];bestDns.textContent = `${best.server} (${getDnsProvider(best.server)})`;return;}const current = results[completed];const index = completed;// 更新进度条const progressBar = document.getElementById(`progress-${index}`);if (progressBar) {progressBar.style.width = '100%';}// 更新响应时间const responseTime = document.getElementById(`time-${index}`);if (responseTime) {responseTime.textContent = `${current.latency.toFixed(1)} ms`;responseTime.style.color = current.latency < 50 ? '#4CAF50' : current.latency < 100 ? '#FFC107' : '#F44336';}// 更新状态const status = document.getElementById(`status-${index}`);if (status) {status.textContent = current.success ? '成功' : '失败';status.className = `status ${current.success ? 'status-success' : 'status-error'}`;}// 更新可靠性const reliability = document.getElementById(`reliability-${index}`);if (reliability) {reliability.textContent = `${current.reliability}%`;reliability.style.color = current.reliability > 90 ? '#4CAF50' : current.reliability > 80 ? '#FFC107' : '#F44336';}// 更新成功率const success = document.getElementById(`success-${index}`);if (success) {success.textContent = current.success ? '100%' : '失败';success.style.color = current.success ? '#4CAF50' : '#F44336';}completed++;}, 800);}// 获取DNS提供商信息function getDnsProvider(ip) {const providers = {'8.8.8.8': 'Google DNS','8.8.4.4': 'Google DNS','1.1.1.1': 'Cloudflare DNS','1.0.0.1': 'Cloudflare DNS','208.67.222.222': 'OpenDNS','208.67.220.220': 'OpenDNS','9.9.9.9': 'Quad9 DNS','149.112.112.112': 'Quad9 DNS','223.5.5.5': '阿里DNS','223.6.6.6': '阿里DNS'};return providers[ip] || '自定义DNS';}});</script>
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3大 “CIA“要素)
 122. 买卖股票的最佳时机 II （贪心）)
