【正文】
作存根網(wǎng)絡(luò)的邊緣 ? A NAT enabled device typically operates at the border of a stub work. ? 2. 邊界路由器執(zhí)行 NAT功能,將內(nèi)部私有地址轉(zhuǎn)換成公網(wǎng)可路由的地址。 ? The border gateway router performs the NAT process, translating the internal private address of a host to a public, external routable address. NAT操作( NAT Operation) 169。 2020, Shenzhen Polytechnic. All rights reserved. 9 1. Inside local address – 指定給內(nèi)部主機(jī)使用的地址 The IP address assigned to a host on the inside work. 2. Inside global address – 從 SP或 NIC注冊(cè)的地址,即內(nèi)部主機(jī)地址被 NAT轉(zhuǎn)換的外部地址 A legitimate IP address assigned by the NIC or service provider that represents one or more inside local IP addresses to the outside world. 3. Address PoolNIC或 SP分配使用的多個(gè)地址 IP addresses assigned by the NIC or service provider NAT術(shù)語(yǔ)( NAT Terms) 169。 2020, Shenzhen Polytechnic. All rights reserved. 10 NAT 靜態(tài) NAT的特征是內(nèi)部主機(jī)地址被一對(duì)一映射到外部主機(jī)地址 Static NAT is designed to allow onetoone mapping of local and global addresses. NAT分類(lèi)( NAT Class) Pc1: Pc2: Pc3: Pc4: ? X 169。 2020, Shenzhen Polytechnic. All rights reserved. 11 NAT分類(lèi)( NAT Class) 2. 動(dòng)態(tài) NAT 動(dòng)態(tài) NAT的特征是內(nèi)部主機(jī)使用地址池中的公網(wǎng)地址來(lái)映射 Dynamic NAT is designed to map a private IP address to a public address. Any IP address from a pool of public IP addresses is assigned to a work host. Pc1: Pc2: Pc3: Pc4: ? √ 169。 2020, Shenzhen Polytechnic. All rights reserved. 12 3. 端口