Cisco Certified Network Professional Practice Test

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In the prefix 2001:0db8:85a3:1111::/64, what does the "/64" indicate?

The number of dynamic addresses available

The number of bits used for the prefix

The notation "/64" in the prefix 2001:0db8:85a3:1111::/64 specifies the number of bits used for the prefix. In an IPv6 address, the prefix length is indicated by a slash followed by a number, which represents the number of contiguous bits that are assigned to the network portion of the address.

In this case, the "/64" means that the first 64 bits of the address "2001:0db8:85a3:1111::" represent the network part, while the remaining 64 bits can be used for host addresses within that network. This is a common convention used in IPv6 addressing, as it allows for a vast number of addresses within a single network segment, facilitating efficient address allocation for numerous devices.

This structure is significant for efficient routing and address distribution in various network designs.

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The total blocks available in IPv6

The version of IPv6

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