TP-Link Technologies Co. Ltd. TDW8980V1 Manuale Utente

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TD-W8980 
N600 Wireless Dual Band Gigabit ADSL2+ Modem Router User Guide
 
25 
 
Figure 4-6 
Click Advance, advanced selections for WAN Service Setup can be shown. 
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  MTU (bytes): Maximum Transmission Unit Size. Check this box then you can change the MTU 
size. The default MTU value is 1500 Bytes. It is not recommended that you change the default 
value unless required by your ISP. 
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  Enable NAT: This technology translates the IP addresses of a local area network to a different 
IP address for the Internet. If this modem router is hosting your network’s connection to the 
Internet, please select the check box. If another Router exists in your network, you don’t need 
to select the option. 
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  Enable Fullcone NAT: It is a type of NAT, if not enabled, the default NAT will act. 
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  Enable SPI Firewall: A SPI firewall enhances network’s security. Select the option to use a 
firewall, or else without a firewall. 
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  Enable  IGMP Proxy: IGMP (Internet Group Management Protocol) is used to manage 
multicasting on TCP/IP networks. Some ISPs use IGMP to perform remote configuration for 
client devices, such as the modem router. The default value is disabled, and if you are not sure, 
please contact your ISP or just leave it.