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test-repo/docs/.vitepress/theme/components/appendix/computer-fundamentals/DataLinkLayerDemo.vue
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<template>
<div class="data-link-demo">
<div class="demo-header">
<span class="title">数据链路层帧的传递</span>
<span class="subtitle">MAC 地址如何定位设备</span>
</div>
<div class="lan-scene">
<div class="lan-title">局域网场景</div>
<div class="lan-devices">
<div
v-for="device in devices"
:key="device.id"
:class="['lan-device', { active: activeDevice === device.id, sender: device.role === 'sender', receiver: device.role === 'receiver' }]"
@click="activeDevice = device.id"
>
<div class="device-icon">{{ device.icon }}</div>
<div class="device-name">{{ device.name }}</div>
<div class="device-mac">{{ device.mac }}</div>
<div v-if="device.role" class="device-role">{{ device.roleText }}</div>
</div>
</div>
<!-- 交换机 -->
<div class="switch">
<div class="switch-icon">🔄</div>
<div class="switch-name">交换机</div>
<div class="switch-desc">根据 MAC 地址转发数据帧</div>
</div>
</div>
<!-- 帧结构 -->
<div class="frame-structure">
<div class="frame-title">以太网帧结构</div>
<div class="frame-visual">
<div class="frame-fields">
<div
v-for="(field, index) in frameFields"
:key="index"
:class="['frame-field', { highlighted: activeDevice !== null }]"
:style="{ width: field.width }"
>
<div class="field-name">{{ field.name }}</div>
<div class="field-value">{{ field.value }}</div>
<div class="field-size">{{ field.size }}</div>
</div>
</div>
</div>
</div>
<!-- 传输过程 -->
<div class="transfer-process">
<div class="process-title">数据帧传输过程</div>
<div class="process-steps">
<div
v-for="(step, index) in transferSteps"
:key="index"
:class="['process-step', { active: activeStep === index }]"
>
<div class="step-number">{{ index + 1 }}</div>
<div class="step-content">
<div class="step-title">{{ step.title }}</div>
<div class="step-desc">{{ step.desc }}</div>
</div>
</div>
</div>
</div>
<!-- ARP 协议 -->
<div class="arp-section">
<div class="arp-title">ARPIP 地址到 MAC 地址的映射</div>
<div class="arp-example">
<div class="arp-question">
<span class="question-icon"></span>
<span class="question-text">谁有 IP 地址 192.168.1.200</span>
</div>
<div class="arp-arrow"> 广播到局域网</div>
<div class="arp-answer">
<span class="answer-icon"></span>
<span class="answer-text">我是我的 MAC 地址是 00:11:22:33:44:66</span>
</div>
</div>
</div>
</div>
</template>
<script setup>
import { ref } from 'vue'
const activeDevice = ref(null)
const activeStep = ref(0)
const devices = [
{
id: 'pc1',
name: '电脑 A',
icon: '💻',
mac: '00:11:22:33:44:55',
ip: '192.168.1.100',
role: 'sender',
roleText: '发送方'
},
{
id: 'pc2',
name: '电脑 B',
icon: '🖥️',
mac: '00:11:22:33:44:66',
ip: '192.168.1.200',
role: 'receiver',
roleText: '接收方'
},
{
id: 'printer',
name: '打印机',
icon: '🖨️',
mac: '00:11:22:33:44:77',
ip: '192.168.1.50'
},
{
id: 'phone',
name: '手机',
icon: '📱',
mac: '00:11:22:33:44:88',
ip: '192.168.1.150'
}
]
const frameFields = [
{
name: '目的 MAC',
value: '00:11:22:33:44:66',
size: '6 字节',
width: '18%'
},
{
name: '源 MAC',
value: '00:11:22:33:44:55',
size: '6 字节',
width: '18%'
},
{
name: '类型',
value: '0x0800 (IPv4)',
size: '2 字节',
width: '12%'
},
{
name: '数据',
value: 'IP 数据包...',
size: '46-1500 字节',
width: '44%'
},
{
name: 'FCS',
value: '校验序列',
size: '4 字节',
width: '8%'
}
]
const transferSteps = [
{
title: '封装成帧',
desc: '发送方将数据封装成以太网帧,添加源 MAC 和目的 MAC 地址'
},
{
title: '发送到交换机',
desc: '帧通过物理介质(网线或 WiFi)发送到交换机'
},
{
title: '交换机转发',
desc: '交换机根据目的 MAC 地址,将帧转发到对应端口'
},
{
title: '接收方处理',
desc: '接收方检查目的 MAC 地址,匹配后接收并处理数据'
}
]
</script>
<style scoped>
.data-link-demo {
border: 1px solid var(--vp-c-divider);
background: var(--vp-c-bg-soft);
border-radius: 12px;
padding: 1.5rem;
margin: 1.5rem 0;
}
.demo-header {
display: flex;
align-items: center;
gap: 0.5rem;
margin-bottom: 1.5rem;
}
.demo-header .title { font-weight: 700; font-size: 1.1rem; }
.demo-header .subtitle { color: var(--vp-c-text-2); font-size: 0.9rem; }
.lan-scene {
background: var(--vp-c-bg);
border: 1px solid var(--vp-c-divider);
border-radius: 8px;
padding: 1.5rem;
margin-bottom: 1.5rem;
}
.lan-title {
font-weight: 600;
font-size: 1rem;
margin-bottom: 1rem;
color: var(--vp-c-brand);
}
.lan-devices {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
gap: 1rem;
margin-bottom: 1.5rem;
}
.lan-device {
text-align: center;
padding: 1rem;
background: var(--vp-c-bg-soft);
border: 2px solid var(--vp-c-divider);
border-radius: 6px;
cursor: pointer;
transition: all 0.3s;
}
.lan-device:hover {
border-color: var(--vp-c-brand);
}
.lan-device.active {
border-color: var(--vp-c-brand);
background: var(--vp-c-brand-soft);
}
.lan-device.sender {
border-color: #10b981;
background: rgba(16, 185, 129, 0.1);
}
.lan-device.receiver {
border-color: #3b82f6;
background: rgba(59, 130, 246, 0.1);
}
.device-icon {
font-size: 2rem;
margin-bottom: 0.5rem;
}
.device-name {
font-weight: 600;
font-size: 0.9rem;
margin-bottom: 0.35rem;
}
.device-mac {
font-family: 'Courier New', monospace;
font-size: 0.7rem;
color: var(--vp-c-text-2);
margin-bottom: 0.5rem;
}
.device-role {
font-size: 0.75rem;
padding: 0.25rem 0.5rem;
background: var(--vp-c-brand);
color: white;
border-radius: 10px;
display: inline-block;
}
.switch {
text-align: center;
padding: 1rem;
background: var(--vp-c-bg-soft);
border: 2px dashed var(--vp-c-divider);
border-radius: 8px;
}
.switch-icon {
font-size: 2rem;
margin-bottom: 0.5rem;
}
.switch-name {
font-weight: 600;
font-size: 0.95rem;
margin-bottom: 0.35rem;
}
.switch-desc {
font-size: 0.8rem;
color: var(--vp-c-text-2);
}
.frame-structure {
margin-bottom: 1.5rem;
}
.frame-title {
font-weight: 600;
font-size: 1rem;
margin-bottom: 1rem;
color: var(--vp-c-brand);
}
.frame-visual {
background: var(--vp-c-bg);
border: 1px solid var(--vp-c-divider);
border-radius: 8px;
padding: 1rem;
}
.frame-fields {
display: flex;
gap: 0.5rem;
}
.frame-field {
border: 2px solid var(--vp-c-divider);
border-radius: 6px;
padding: 0.75rem 0.5rem;
text-align: center;
background: var(--vp-c-bg-soft);
transition: all 0.3s;
}
.frame-field.highlighted {
border-color: var(--vp-c-brand);
background: var(--vp-c-brand-soft);
}
.field-name {
font-weight: 600;
font-size: 0.8rem;
margin-bottom: 0.35rem;
}
.field-value {
font-family: 'Courier New', monospace;
font-size: 0.75rem;
color: var(--vp-c-text-2);
margin-bottom: 0.35rem;
}
.field-size {
font-size: 0.7rem;
color: var(--vp-c-text-2);
}
.transfer-process {
margin-bottom: 1.5rem;
}
.process-title {
font-weight: 600;
font-size: 1rem;
margin-bottom: 1rem;
color: var(--vp-c-brand);
}
.process-steps {
display: flex;
flex-direction: column;
gap: 0.75rem;
}
.process-step {
display: flex;
gap: 1rem;
padding: 0.75rem;
background: var(--vp-c-bg);
border: 1px solid var(--vp-c-divider);
border-radius: 6px;
}
.step-number {
display: flex;
align-items: center;
justify-content: center;
width: 28px;
height: 28px;
background: var(--vp-c-brand);
color: white;
border-radius: 50%;
font-size: 0.85rem;
font-weight: 600;
flex-shrink: 0;
}
.step-content {
flex: 1;
}
.step-title {
font-weight: 600;
font-size: 0.9rem;
margin-bottom: 0.25rem;
}
.step-desc {
font-size: 0.85rem;
color: var(--vp-c-text-2);
line-height: 1.4;
}
.arp-section {
border-top: 1px solid var(--vp-c-divider);
padding-top: 1.5rem;
}
.arp-title {
font-weight: 600;
font-size: 1rem;
margin-bottom: 1rem;
color: var(--vp-c-brand);
}
.arp-example {
background: var(--vp-c-bg);
border: 1px solid var(--vp-c-divider);
border-radius: 8px;
padding: 1rem;
}
.arp-question,
.arp-answer {
display: flex;
align-items: center;
gap: 0.75rem;
padding: 0.75rem;
border-radius: 6px;
margin-bottom: 0.75rem;
}
.arp-question {
background: rgba(59, 130, 246, 0.1);
}
.arp-answer {
background: rgba(16, 185, 129, 0.1);
margin-bottom: 0;
}
.question-icon,
.answer-icon {
font-size: 1.5rem;
flex-shrink: 0;
}
.question-text,
.answer-text {
font-size: 0.9rem;
}
.arp-arrow {
text-align: center;
font-size: 0.85rem;
color: var(--vp-c-text-2);
margin: 0.75rem 0;
}
@media (max-width: 768px) {
.frame-fields {
flex-wrap: wrap;
}
.frame-field {
min-width: 100px;
}
}
</style>