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2018-02-27 11:49:30 +08:00
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notes/计算机网络.md
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@ -41,9 +41,9 @@
* [<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Э<EFBFBD><EFBFBD> IP <20><><EFBFBD><EFBFBD>](#<23><><EFBFBD><EFBFBD>Э<EFBFBD><D0AD>-ip-<2D><><EFBFBD><EFBFBD>)
* [IP <20><><EFBFBD>ݱ<EFBFBD><DDB1><EFBFBD>ʽ](#ip-<2D><><EFBFBD>ݱ<EFBFBD><DDB1><EFBFBD>ʽ)
* [IP <20><>ַ<EFBFBD><D6B7>ַ](#ip-<2D><>ַ<EFBFBD><D6B7>ַ)
* [1. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> IP <20><>ַ](#1-<2D><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>-ip-<2D><>ַ)
* [2. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>](#2-<2D><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)
* [3. <20>޷<EFBFBD><DEB7><EFBFBD><EFBFBD><EFBFBD>ַ CIDR<44><52><EFBFBD><EFBFBD><EFBFBD>ɳ<EFBFBD><C9B3><EFBFBD><EFBFBD><EFBFBD>](#3-<2D>޷<EFBFBD><DEB7><EFBFBD><EFBFBD><EFBFBD>ַ-cidr<64><72><EFBFBD>ɳ<EFBFBD><EFBFBD><EFBFBD>)
* [1. <20><><EFBFBD><EFBFBD>](#1-<2D><><EFBFBD><EFBFBD>)
* [2. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>](#2-<2D><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)
* [3. <20>޷<EFBFBD><DEB7><EFBFBD>](#3-<2D>޷<EFBFBD><EFBFBD><EFBFBD>)
* [IP <20><>ַ<EFBFBD><D6B7> MAC <20><>ַ](#ip-<2D><>ַ<EFBFBD><D6B7>-mac-<2D><>ַ)
* [<EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Э<EFBFBD><EFBFBD> ARP](#<23><>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD>Э<EFBFBD><D0AD>-arp)
* [·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ľṹ](#·<><C2B7><EFBFBD><EFBFBD><EFBFBD>Ľṹ)
@ -340,13 +340,16 @@ CSMA/CD
MAC <20><>ַ<EFBFBD><D6B7> 6 <20>ֽڣ<D6BD>48 λ<><CEBB><EFBFBD>ĵ<EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ψһ<CEA8><D2BB>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ̨<D2BB><CCA8><EFBFBD><EFBFBD>ӵ<EFBFBD>ж<EFBFBD><D0B6>ٸ<EFBFBD><D9B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ж<EFBFBD><D0B6>ٸ<EFBFBD> MAC <20><>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼDZ<CABC><C7B1><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ձ<EFBFBD><D5B1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
MAC ֡<><D6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD><D6B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϲ<EFBFBD>ʹ<EFBFBD><CAB9>ʲôЭ<C3B4>飻<EFBFBD><E9A3BB><EFBFBD><EFBFBD><EFBFBD>ֶγ<D6B6><CEB3><EFBFBD><EFBFBD><EFBFBD> 46-1500 ֮<>䣬<EFBFBD><E4A3AC><EFBFBD><EFBFBD>̫С<CCAB><D0A1><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD>䣻FCS Ϊ֡<CEAA><D6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD>ʹ<EFBFBD>õ<EFBFBD><C3B5><EFBFBD> CRC <20><><EFBFBD>鷽<EFBFBD><E9B7BD><EFBFBD><EFBFBD>ǰ<EFBFBD><C7B0><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰͬ<C7B0><CDAC><EFBFBD><EFBFBD>ֻ<EFBFBD><D6BB>Ϊ<EFBFBD>˼<EFBFBD><CBBC><EFBFBD> FCS <20><>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><C4A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><D6AE><EFBFBD>ᶪ<EFBFBD><E1B6AA><EFBFBD><EFBFBD>
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/50d38e84-238f-4081-8876-14ef6d7938b5.jpg)
- **<2A><><EFBFBD><EFBFBD>**<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ϲ<EFBFBD>ʹ<EFBFBD>õ<EFBFBD>Э<EFBFBD>飻
- **<2A><><EFBFBD><EFBFBD>**<2A><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 46-1500 ֮<>䣬<EFBFBD><E4A3AC><EFBFBD><EFBFBD>̫С<CCAB><D0A1><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD>䣻
- **FCS**<2A><>֡<EFBFBD><D6A1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD>ʹ<EFBFBD>õ<EFBFBD><C3B5><EFBFBD> CRC <20><><EFBFBD>鷽<EFBFBD><E9B7BD><EFBFBD><EFBFBD>
- **ǰͬ<C7B0><CDAC><EFBFBD><EFBFBD>**<2A><>ֻ<EFBFBD><D6BB>Ϊ<EFBFBD>˼<EFBFBD><CBBC><EFBFBD> FCS <20><>ʱ<EFBFBD><CAB1><EFBFBD><EFBFBD><EFBFBD>ģ<EFBFBD><C4A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֮<EFBFBD><D6AE><EFBFBD>ᶪ<EFBFBD><E1B6AA><EFBFBD><EFBFBD>
## <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD>޹ص<EFBFBD><EFBFBD>߼<EFBFBD><EFBFBD>飬ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>еij<EFBFBD>Ա<EFBFBD>Ż<EFBFBD><EFBFBD>յ<EFBFBD><EFBFBD>㲥<EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD> (A1, A2, A3, A4) <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>A1 <20><><EFBFBD>͵Ĺ㲥<C4B9>ᱻ A2<41><32>A3<41><33>A4 <20>յ<EFBFBD><D5B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>վ<EFBFBD><D5BE><EFBFBD>ղ<EFBFBD><D5B2><EFBFBD><EFBFBD><EFBFBD>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Խ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD>޹ص<EFBFBD><EFBFBD>߼<EFBFBD><EFBFBD>飬ֻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬһ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>еij<EFBFBD>Ա<EFBFBD>Ż<EFBFBD><EFBFBD>յ<EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD>㲥<EFBFBD><EFBFBD>Ϣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͼ<EFBFBD><EFBFBD> (A1, A2, A3, A4) <20><><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>A1 <20><><EFBFBD>͵Ĺ㲥<C4B9>ᱻ A2<41><32>A3<41><33>A4 <20>յ<EFBFBD><D5B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>վ<EFBFBD><D5BE><EFBFBD>ղ<EFBFBD><D5B2><EFBFBD><EFBFBD><EFBFBD>
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/a74b70ac-323a-4b31-b4d5-90569b8a944b.png)
@ -372,35 +375,35 @@ MAC ֡
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/8681db55-0873-434b-aa98-83d07e8392ae.jpg)
**<EFBFBD>汾** : <20><> 4<><34>IPv4<76><34><EFBFBD><EFBFBD> 6<><36>IPv6<76><36><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5>
- **<2A>汾** : <20><> 4<><34>IPv4<76><34><EFBFBD><EFBFBD> 6<><36>IPv6<76><36><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵ<EFBFBD><D6B5>
**<EFBFBD>ײ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>** : ռ 4 λ<><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵΪ 15<31><35>ֵΪ 1 <20><>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD> 1 <20><> 32 λ<>ֵij<D6B5><C4B3>ȣ<EFBFBD>Ҳ<EFBFBD><D2B2><EFBFBD><EFBFBD> 4 <20>ֽڡ<D6BD><DAA1><EFBFBD>Ϊ<EFBFBD>ײ<EFBFBD><D7B2>̶<EFBFBD><CCB6><EFBFBD><EFBFBD><EFBFBD>Ϊ 20 <20>ֽڣ<D6BD><DAA3><EFBFBD><EFBFBD>˸<EFBFBD>ֵ<EFBFBD><D6B5>СΪ 5<><35><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><D1A1><EFBFBD>ֵij<D6B5><C4B3>Ȳ<EFBFBD><C8B2><EFBFBD> 4 <20>ֽڵ<D6BD><DAB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>β<EFBFBD><CEB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>䲿<EFBFBD><E4B2BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>䡣
- **<2A>ײ<EFBFBD><D7B2><EFBFBD><EFBFBD><EFBFBD>** : ռ 4 λ<><CEBB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֵΪ 15<31><35>ֵΪ 1 <20><>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD> 1 <20><> 32 λ<>ֵij<D6B5><C4B3>ȣ<EFBFBD>Ҳ<EFBFBD><D2B2><EFBFBD><EFBFBD> 4 <20>ֽڡ<D6BD><DAA1><EFBFBD>Ϊ<EFBFBD>ײ<EFBFBD><D7B2>̶<EFBFBD><CCB6><EFBFBD><EFBFBD><EFBFBD>Ϊ 20 <20>ֽڣ<D6BD><DAA3><EFBFBD><EFBFBD>˸<EFBFBD>ֵ<EFBFBD><D6B5>СΪ 5<><35><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ѡ<EFBFBD><D1A1><EFBFBD>ֵij<D6B5><C4B3>Ȳ<EFBFBD><C8B2><EFBFBD> 4 <20>ֽڵ<D6BD><DAB5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>β<EFBFBD><CEB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>䲿<EFBFBD><E4B2BF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>䡣
**<EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD>** : <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><C3B8>õķ<C3B5><C4B7><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>²<EFBFBD>ʹ<EFBFBD><EFBFBD><EFBFBD>á<EFBFBD>
- **<2A><><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD>** : <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ø<EFBFBD><C3B8>õķ<C3B5><C4B7><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>²<EFBFBD>ʹ<EFBFBD>á<EFBFBD>
**<EFBFBD>ܳ<EFBFBD><EFBFBD><EFBFBD>** : <20><><EFBFBD><EFBFBD><EFBFBD>ײ<EFBFBD><D7B2><EFBFBD><EFBFBD>Ⱥ<EFBFBD><C8BA><EFBFBD><EFBFBD>ݲ<EFBFBD><DDB2>ֳ<EFBFBD><D6B3>ȡ<EFBFBD>
- **<2A>ܳ<EFBFBD><DCB3><EFBFBD>** : <20><><EFBFBD><EFBFBD><EFBFBD>ײ<EFBFBD><D7B2><EFBFBD><EFBFBD>Ⱥ<EFBFBD><C8BA><EFBFBD><EFBFBD>ݲ<EFBFBD><DDB2>ֳ<EFBFBD><D6B3>ȡ<EFBFBD>
**<EFBFBD><EFBFBD>ʶ** : <20><><EFBFBD><EFBFBD><EFBFBD>ݱ<EFBFBD><DDB1><EFBFBD><EFBFBD>ȹ<EFBFBD><C8B9><EFBFBD><EFBFBD>Ӷ<EFBFBD><D3B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƭ<EFBFBD><C6AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>£<EFBFBD><C2A3><EFBFBD>ͬ<EFBFBD><CDAC><EFBFBD>ݱ<EFBFBD><DDB1>IJ<EFBFBD>ͬ<EFBFBD><CDAC>Ƭ<EFBFBD><C6AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD>ı<EFBFBD>ʶ<EFBFBD><CAB6><EFBFBD><EFBFBD>
- **<2A><>ʶ** : <20><><EFBFBD><EFBFBD><EFBFBD>ݱ<EFBFBD><DDB1><EFBFBD><EFBFBD>ȹ<EFBFBD><C8B9><EFBFBD><EFBFBD>Ӷ<EFBFBD><D3B6><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƭ<EFBFBD><C6AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>£<EFBFBD><C2A3><EFBFBD>ͬ<EFBFBD><CDAC><EFBFBD>ݱ<EFBFBD><DDB1>IJ<EFBFBD>ͬ<EFBFBD><CDAC>Ƭ<EFBFBD><C6AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͬ<EFBFBD>ı<EFBFBD>ʶ<EFBFBD><CAB6><EFBFBD><EFBFBD>
**Ƭƫ<C6AC><C6AB>** : <20>ͱ<EFBFBD>ʶ<EFBFBD><CAB6>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڷ<EFBFBD><DAB7><EFBFBD><EFBFBD><EFBFBD>Ƭ<EFBFBD><C6AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƭƫ<C6AC>Ƶĵ<C6B5>λΪ 8 <20>ֽڡ<D6BD>
- **Ƭƫ<C6AC><C6AB>** : <20>ͱ<EFBFBD>ʶ<EFBFBD><CAB6>һ<EFBFBD><D2BB><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڷ<EFBFBD><DAB7><EFBFBD><EFBFBD><EFBFBD>Ƭ<EFBFBD><C6AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƭƫ<C6AC>Ƶĵ<C6B5>λΪ 8 <20>ֽڡ<D6BD>
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/45c86855-9b18-4cf4-a9a7-f8b6eb78d133.png)
**<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>** <20><>TTL<54><4C><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD>Ϊ<EFBFBD>˷<EFBFBD>ֹ<EFBFBD>޷<EFBFBD><DEB7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݱ<EFBFBD><DDB1>ڻ<EFBFBD><DABB><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><D0B2>϶<EFBFBD>Ȧ<EFBFBD>ӡ<EFBFBD><D3A1><EFBFBD>·<EFBFBD><C2B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA>λ<EFBFBD><CEBB><EFBFBD><EFBFBD> TTL Ϊ 0 ʱ<>Ͷ<EFBFBD><CDB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݱ<EFBFBD><DDB1><EFBFBD>
- **<2A><><EFBFBD><EFBFBD>ʱ<EFBFBD><CAB1>** <20><>TTL<54><4C><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><C4B4><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD>˷<EFBFBD>ֹ<EFBFBD>޷<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݱ<EFBFBD><EFBFBD>ڻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD><EFBFBD>϶<EFBFBD>Ȧ<EFBFBD>ӡ<EFBFBD><EFBFBD><EFBFBD>·<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>λ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> TTL Ϊ 0 ʱ<>Ͷ<EFBFBD><CDB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݱ<EFBFBD><DDB1><EFBFBD>
**Э<><D0AD>**<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>Я<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD>Ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD>Э<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ICMP<4D><50>TCP<43><50>UDP <20>ȡ<EFBFBD>
- **Э<><D0AD>**<2A><>ָ<EFBFBD><D6B8>Я<EFBFBD><D0AF><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><D3A6><EFBFBD>Ͻ<EFBFBD><CFBD><EFBFBD><EFBFBD>ĸ<EFBFBD>Э<EFBFBD><D0AD><EFBFBD><EFBFBD><EFBFBD>д<EFBFBD><D0B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ICMP<4D><50>TCP<43><50>UDP <20>ȡ<EFBFBD>
**<EFBFBD>ײ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>**<2A><><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>ݱ<EFBFBD>ÿ<EFBFBD><C3BF><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>·<EFBFBD><C2B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD><CDA3><EFBFBD><EFBFBD>˼<EFBFBD><CBBC><EFBFBD><EFBFBD>Ͳ<EFBFBD><CDB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݲ<EFBFBD><DDB2>ֿ<EFBFBD><D6BF>Լ<EFBFBD><D4BC>ټ<EFBFBD><D9BC><EFBFBD><EFBFBD>Ĺ<EFBFBD><C4B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
- **<2A>ײ<EFBFBD><D7B2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>**<2A><><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD>ݱ<EFBFBD>ÿ<EFBFBD><C3BF><EFBFBD><EFBFBD>һ<EFBFBD><D2BB>·<EFBFBD><C2B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD><D2AA><EFBFBD>¼<EFBFBD><C2BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͣ<EFBFBD><CDA3><EFBFBD><EFBFBD>˼<EFBFBD><CBBC><EFBFBD><EFBFBD>Ͳ<EFBFBD><CDB2><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ݲ<EFBFBD><DDB2>ֿ<EFBFBD><D6BF>Լ<EFBFBD><D4BC>ټ<EFBFBD><D9BC><EFBFBD><EFBFBD>Ĺ<EFBFBD><C4B9><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
## IP <20><>ַ<EFBFBD><D6B7>ַ
IP <20><>ַ<EFBFBD>ı<EFBFBD>ַ<EFBFBD><D6B7>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʷ<EFBFBD>׶Σ<D7B6>
1. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> IP <20><>ַ<EFBFBD><D6B7>
2. <20><><EFBFBD><EFBFBD><EFBFBD>Ļ<EFBFBD><EFBFBD>֣<EFBFBD>
3. <20><EFBFBD><EFBFBD>ɳ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
1. <20><><EFBFBD>ࣻ
2. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֣<EFBFBD>
3. <20>޷<EFBFBD><EFBFBD>ࡣ
### 1. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> IP <20><>ַ
### 1. <20><><EFBFBD><EFBFBD>
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ź<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>в<EFBFBD>ͬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ų<EFBFBD><EFBFBD>ȣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǹ̶<EFBFBD><EFBFBD>ġ<EFBFBD>
@ -408,7 +411,7 @@ IP
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/2ddd6132-60be-4a72-9daa-3d9756191f4a.png)
### 2. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
### 2. <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ֶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ţ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> IP <20><>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD> IP <20><>ַ<EFBFBD><D6B7>ע<EFBFBD>⣬<EFBFBD>ⲿ<EFBFBD><E2B2BF><EFBFBD>翴<EFBFBD><E7BFB4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ<EFBFBD><C4B4>ڡ<EFBFBD>
@ -416,9 +419,9 @@ IP
Ҫʹ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>롣һ<EFBFBD><EFBFBD> B <20><><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7>Ĭ<EFBFBD><C4AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ 255.255.0.0<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> B <20><><EFBFBD><EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ռ<EFBFBD><D5BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>أ<EFBFBD><D8A3><EFBFBD>ô<EFBFBD><C3B4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϊ 11111111 11111111 11000000 000000<30><30>Ҳ<EFBFBD><D2B2><EFBFBD><EFBFBD> 255.255.192.0<EFBFBD><EFBFBD>
### 3. <20>޷<EFBFBD><DEB7><EFBFBD><EFBFBD><EFBFBD>ַ CIDR<44><52><EFBFBD><EFBFBD><EFBFBD>ɳ<EFBFBD><C9B3><EFBFBD><EFBFBD><EFBFBD>
### 3. <20>޷<EFBFBD><DEB7><EFBFBD>
CIDR <20><><EFBFBD><EFBFBD><EFBFBD>˴<EFBFBD>ͳ A <20>ࡢB <20><><EFBFBD><EFBFBD> C <20><><EFBFBD><EFBFBD>ַ<EFBFBD>Լ<EFBFBD><D4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><C4B8>ʹ<EEA3AC><CAB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ׺<C7B0><D7BA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> IP <20><>ַ<EFBFBD><D6B7><EFBFBD>б<EFBFBD><D0B1>룬<EFBFBD><EBA3AC><EFBFBD><EFBFBD>ǰ׺<C7B0>ij<EFBFBD><C4B3>ȿ<EFBFBD><C8BF>Ը<EFBFBD><D4B8><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>仯<EFBFBD><E4BBAF>
<EFBFBD>޷<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ CIDR <20><><EFBFBD><EFBFBD><EFBFBD>˴<EFBFBD>ͳ A <20>ࡢB <20><><EFBFBD><EFBFBD> C <20><><EFBFBD><EFBFBD>ַ<EFBFBD>Լ<EFBFBD><D4BC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ĸ<EFBFBD><C4B8>ʹ<EEA3AC><CAB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ׺<C7B0><D7BA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> IP <20><>ַ<EFBFBD><D6B7><EFBFBD>б<EFBFBD><D0B1>룬<EFBFBD><EBA3AC><EFBFBD><EFBFBD>ǰ׺<C7B0>ij<EFBFBD><C4B3>ȿ<EFBFBD><C8BF>Ը<EFBFBD><D4B8><EFBFBD><EFBFBD><EFBFBD>Ҫ<EFBFBD>仯<EFBFBD><E4BBAF>
IP <20><>ַ ::= {< <20><><EFBFBD><EFBFBD>ǰ׺<C7B0><D7BA> >, < <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> >}
@ -426,9 +429,9 @@ CIDR
CIDR <20>ĵ<EFBFBD>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Լ<EFBFBD><D4BC><EFBFBD><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>룬<EFBFBD><EBA3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 1 <20><><EFBFBD><EFBFBD>Ϊ<EFBFBD><CEAA><EFBFBD><EFBFBD>ǰ׺<C7B0>ij<EFBFBD><C4B3>ȡ<EFBFBD>
һ<EFBFBD><EFBFBD> CIDR <20><>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD>кܶ<D0BA><DCB6><EFBFBD>ַ<EFBFBD><D6B7>һ<EFBFBD><D2BB> CIDR <20><>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϳ<EFBFBD><CDBF>Ա<EFBFBD>ʾԭ<CABE><D4AD><EFBFBD>ĺܶ<C4BA><DCB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>磬<EFBFBD><E7A3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD>ɱ<EFBFBD><C9B1><EFBFBD>ֻ<EFBFBD><D6BB>Ҫһ<D2AA><D2BB>·<EFBFBD>ɾͿ<C9BE><CDBF>Դ<EFBFBD><D4B4><EFBFBD>ԭ<EFBFBD><D4AD><EFBFBD>Ķ<EFBFBD><C4B6><EFBFBD>·<EFBFBD>ɣ<EFBFBD><C9A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD>ɱ<EFBFBD><C9B1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><CDA8>ʹ<EFBFBD><CAB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ׺<C7B0><D7BA><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD>ɱ<EFBFBD><C9B1><EFBFBD><EFBFBD>ķ<EFBFBD>ʽ<EFBFBD><CABD>Ϊ·<CEAA>ɾۺϣ<DBBA>Ҳ<EFBFBD><D2B2>Ϊ<EFBFBD><CEAA><EFBFBD>ɳ<EFBFBD><C9B3><EFBFBD><EFBFBD><EFBFBD>
һ<EFBFBD><EFBFBD> CIDR <20><>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD>кܶ<D0BA><DCB6><EFBFBD>ַ<EFBFBD><D6B7>һ<EFBFBD><D2BB> CIDR <20><>ʾ<EFBFBD><CABE><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ϳ<EFBFBD><CDBF>Ա<EFBFBD>ʾԭ<CABE><D4AD><EFBFBD>ĺܶ<C4BA><DCB6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>磬<EFBFBD><E7A3AC><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD>ɱ<EFBFBD><C9B1><EFBFBD>ֻ<EFBFBD><D6BB>Ҫһ<D2AA><D2BB>·<EFBFBD>ɾͿ<C9BE><CDBF>Դ<EFBFBD><D4B4><EFBFBD>ԭ<EFBFBD><D4AD><EFBFBD>Ķ<EFBFBD><C4B6><EFBFBD>·<EFBFBD>ɣ<EFBFBD><C9A3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD>ɱ<EFBFBD><C9B1><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><CDA8>ʹ<EFBFBD><CAB9><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ׺<C7B0><D7BA><EFBFBD><EFBFBD><EFBFBD><EFBFBD>·<EFBFBD>ɱ<EFBFBD><C9B1><EFBFBD><EFBFBD>ķ<EFBFBD>ʽ<EFBFBD><CABD>Ϊ·<CEAA>ɾۺϣ<DBBA>Ҳ<EFBFBD><D2B2>Ϊ **<EFBFBD><EFBFBD><EFBFBD>ɳ<EFBFBD><EFBFBD><EFBFBD>**<EFBFBD><EFBFBD>
<EFBFBD><EFBFBD>·<EFBFBD>ɱ<EFBFBD><EFBFBD><EFBFBD>ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD>ɡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ׺<EFBFBD><EFBFBD><EFBFBD>͡<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɣ<EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ܻ<EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD>ֹһ<EFBFBD><EFBFBD>ƥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ׺ƥ<EFBFBD>䡣
<EFBFBD><EFBFBD>·<EFBFBD>ɱ<EFBFBD><EFBFBD>е<EFBFBD><EFBFBD><EFBFBD>Ŀ<EFBFBD>ɡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ׺<EFBFBD><EFBFBD><EFBFBD>͡<EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ַ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɣ<EFBFBD><EFBFBD>ڲ<EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD><EFBFBD>ܻ<EFBFBD><EFBFBD>õ<EFBFBD><EFBFBD><EFBFBD>ֹһ<EFBFBD><EFBFBD>ƥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǰ׺ƥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ȷ<EFBFBD><EFBFBD>Ӧ<EFBFBD><EFBFBD>ƥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
## IP <20><>ַ<EFBFBD><D6B7> MAC <20><>ַ
@ -440,7 +443,7 @@ CIDR
ʵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> IP <20><>ַ<EFBFBD>õ<EFBFBD> MAC <20><>ַ<EFBFBD><D6B7>
ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD> ARP <20><><EFBFBD>ٻ<EFBFBD><D9BB>棬<EFBFBD><E6A3AC><EFBFBD><EFBFBD>ӳ<EFBFBD><D3B3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB> IP <20><>ַ <EFBFBD><EFBFBD> MAC <20><>ַ<EFBFBD><D6B7>ӳ<EFBFBD>䲻<EFBFBD>ڸñ<DAB8><C3B1>У<EFBFBD><D0A3><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><CDA8><EFBFBD>㲥<EFBFBD>ķ<EFBFBD>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD> ARP <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>飬ƥ<E9A3AC><C6A5> IP <20><>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᷢ<EFBFBD><E1B7A2> ARP <20><>Ӧ<EFBFBD><D3A6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֪ MAC <20><>ַ<EFBFBD><D6B7>
ÿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD> ARP <20><><EFBFBD>ٻ<EFBFBD><D9BB>棬<EFBFBD><E6A3AC><EFBFBD><EFBFBD>ӳ<EFBFBD><D3B3><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><D2BB> IP <20><>ַ<EFBFBD><D6B7> MAC <20><>ַ<EFBFBD><D6B7>ӳ<EFBFBD>䲻<EFBFBD>ڸñ<DAB8><C3B1>У<EFBFBD><D0A3><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><CDA8><EFBFBD>㲥<EFBFBD>ķ<EFBFBD>ʽ<EFBFBD><CABD><EFBFBD><EFBFBD> ARP <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>飬ƥ<E9A3AC><C6A5> IP <20><>ַ<EFBFBD><D6B7><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᷢ<EFBFBD><E1B7A2> ARP <20><>Ӧ<EFBFBD><D3A6><EFBFBD><EFBFBD><EFBFBD><EFBFBD>֪<EFBFBD><EFBFBD> MAC <20><>ַ<EFBFBD><D6B7>
![](https://github.com/CyC2018/InterviewNotes/blob/master/pics/8bc6fc2c-d198-4759-b06c-18d94d851e97.png)