Alfa Network AIP-610H User Manual page 38

User Name: The account provided by your ISP
Password: The password of your account
MTU Size: Maximum Transmission Unit, 1412 is the default setting, you may need to
DNS1~3: The IP addresses of DNS provided by your ISP. DNS (Domain Name Server)
change the MTU for optimal performance with your specific
ISP.
is used to map domain names to IP addresses. DNS maintain
central lists of domain name/IP addresses and map the domain
names in your Internet requests to other servers on the Internet
until the specified web site is found.