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Reference: CCNA Self-Study CCNA ICND exam certification Guide (Cisco Press, ISBN 1-58720-083-X) Page 236. Which subnet mask is the most efficient? 252 subnet mask is often used for these types of links, as no IP addresses are wasted. Which of the masks below would you use? 252 is a /30, so answer B is correct. It is not possible to use a /38 mask, unless of course IPv6 is being used. These masks will provide for a larger number of host addresses, and since only 2 IP addresses are needed for a point to point link, these extra addresses are wasted.
Since this is a class C network, this subnet can have only 1 network and 254 usable hosts. QUESTION NO: 24 Given that you have a class B IP address network range, which of the subnet masks below will allow for 100 subnets with 500 usable host addresses per subnet? If these 9 bits are used for the hosts in a class B network, then the remaining 7 bits are used for the number of networks. Again using the 2n-2 formula, we have 2n-2 = 126 networks that are available. This will provide for 6 networks with 8190 host addresses.
224 subnet mask? com - 55 - next network 0 0 1 1 0 0 0 0 (which equals 48) Range of host values are: RANGE 0 0 1 0 0 0 0 1 TO RANGE 0 0 1 0 1 1 1 0 network is 32 the next network is 32 + 16 = 48 the range is 32 + 1 to 48 - 2. this results in a range 33 to 46. These choices are both network addresses. This is a broadcast address. After subnetting the address, the team is ready to assign the address. As a member of the networking team, you must address the network and at the same time converse unused addresses for future growth.