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Windows Media Encoder allows up to five direct connections during a broadcast. You can specify which computer or range of computers is allowed to access the encoder. To allow or deny access to individual computers, use the IP address. To allow or deny access to a range of computers, use the IP mask.
When you restrict access to a broadcast by IP address, you can specify both Internet Protocol version 6 (IPv6) and Internet Protocol version 4 (IPv4) addresses. IPv6 is the newest version of the Internet Protocol and was designed to accommodate the rapidly increasing demand for unique IP addresses. IPv6 increases the IP address size from 32 bits to 128 bits to support more levels of addressing hierarchy and a greater number of addressable nodes. For more information about IPv6, see the IPv6 page at the Microsoft Web site.
In a range of addresses, each bit in an IP mask is compared to the corresponding bit in the IP address. When the value in the mask is 1, the corresponding bit in the IP address is included in the range. When the value in the mask is 0, any value is acceptable. For example, in decimal notation, if the IP address in the list is 134.123.123.20 and the mask is 255.255.255.0, all IP addresses from 134.123.123.0 to 134.123.123.255 are included in the range. If the mask is 255.255.255.128, all IP addresses from 134.123.123.0 to 134.123.123.127 are included in the range. If you specify an invalid mask, the IP address is ignored.