discovery_smb_isp_chapter_4_en（思科網(wǎng)絡(luò)技術(shù)學(xué)院ccna40官方資料-ccnadiscovery-cac建議版discovery_ppt英文版-d2_smb_isp_ppt_en）(文件)
【正文】 Network Address Translation (NAT) Network Address Translation (NAT) allows a large group of private users to access the Inter by sharing a small pool of public IP addresses, NAT saving registered IP addresses, provide security. 24 思科網(wǎng)絡(luò)技術(shù)學(xué)院理事會 . Basic Network Address Translation (NAT) NAT does have some advantages and disadvantages 25 思科網(wǎng)絡(luò)技術(shù)學(xué)院理事會 . IP NAT Terms ? An inside local address is the private IP address configured on a host on an inside work. ? An inside global address is the IP address of an inside host as it appears to the outside work. ? An outside local address is the destination address of the packet while it is on the local work. ? An outside global address is the actual public IP address of an external host. 26 思科網(wǎng)絡(luò)技術(shù)學(xué)院理事會 . IP NAT Terms An inside local address An inside global address An outside global address An outside address local 27 思科網(wǎng)絡(luò)技術(shù)學(xué)院理事會 . Static and Dynamic NAT Static translations ensure that an individual host private IP address is always translated to the same registered global IP address. If a device on the inside work needs to be accessible from the outside, use static NAT. Dynamic NAT occurs when a router is configured to assign an IP address from an available pool of outside global addresses to an inside private work device. When the session ends, the router simply returns the inside global address to the pool. hen configuring NAT for user access to the outside, configure dynamic NAT 28 思科網(wǎng)絡(luò)技術(shù)學(xué)院理事會 . PortBased Network Address Translation (PAT) Port address translation (PAT) is also called NAT overload ,it translates multiple local a
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