![]() Tunneling _ is a transition method that encapsulates IPv6 traffic inside IPv4 packets. Dual stack The _ transition method involves enabling IPv6 on all routers, switches, and end nodes but not disabling IPv4-so both version 4 and version 6 stacks run at the same time. IPsec _ is the most important layer 3 security protocol. 16 _ is the version of IP currently deployed on most systems today. 1100 0000 Although the base _ numbering system seems foreign at first glance, largely due to the addition of letters, it really is an efficient way to express large numbers such as MAC and IPv6 addresses. Classless The decimal number 192 expressed in binary is _. Summarization tables In a _ world, the routing updates carry subnet mask information and allow different masks to be used on different subnets. Prefix _ tell the computer or router which part of an IP address is the network portion and which part is the host portion. CIDR The CIDR addressing method allows the use of a _ to designate the number of network bits in the mask. _ is based on assigning IP addresses on criteria other than octet boundaries.
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