CCNA Exam Licensing Scope Storing Operating Program Files Separately
1. You have got a large IP-routed network using the address 137.25.0.0; it is composed of 20 sub- nets, having a maximum of 300 hosts on each subnet. Your corporation continues on a merger and acquisitions spree, as well as your manager has told you to prepare for an boost to 50 subnets, with some of them containing significantly more than 600 hosts. Using the current network address, which in the following subnet masks would operate for that requirement out of your manager?
A. 255.255.252.0
B. 255.255.254.0
C. 255.255.248.0
D. 255.255.240.0
Answer: A. A Class B address using a default subnet mcts 70-680
mask of 255.255.0.0 will support as much as 65,534 hosts. To increase the amount of networks that this network will support, you’ll want to subnet the network by borrowing bits from the host portion in the address. The subnet mask 255.255.252.0 makes use of 6 bits from the hosts region and will support 64 subnets whilst leaving sufficient bits to assistance 1,022 hosts per subnet. The subnet mask 255.255.248.0 uses five bits from the hosts and will assistance 32 subnetworks when leaving adequate bits to support two,046 hosts per subnet. 255.255.252.0 is the far better answer for the reason that it leaves quite a bit of space for additional growth inside the quantity of networks when nonetheless leaving room for a lot more than 1,000 hosts per subnet, which is a fairly large quantity of devices on one subnet. The subnet mask 255.255.254.0 utilizes 7 bits from the hosts region and can support much more than 120 networks, however it will leave only sufficient bits to assistance 500 hosts per subnet. The subnet mask 255.255.240.0 makes use of 4 bits from the hosts and can assistance only 16 subnetworks, even though it will leave sufficient bits to support even more than four,000 hosts per subnet.
2. The business you work for is developing substantially by way of acquisitions of other firms. As the network administrator, it is advisable to keep up with all the changes for the reason that they affect the work- stations, and you will need to assistance them. When you started, there were 15 places connected via routers, and now you’ll find 25. As new firms are acquired, they’re migrated to Windows Server 2008 and brought into the similar domain as one other website. Management says that they may be going to acquire at least ten a great deal mcts windows 7
more firms within the subsequent two years. The engineers have also told you that they may be redesigning the companys Class B address into an IP addressing scheme that could assistance these specifications and that there will under no circumstances be significantly more than 1,000 net- perform devices on any subnet. What will likely be the proper subnet mask to assistance this network when the modifications are completed?
A. 255.255.252.0
B. 255.255.248.0
C. 255.255.255.0
D. 255.255.255.128
Answer: A. The network mask applied to an address determines which portion of that address reflects the amount of hosts out there to that network. The balance with subnetting is constantly between the number of hosts and individual subnetworks which could be uniquely represented within one particular encompassing address. The amount of hosts and networks that happen to be produced attainable depends upon the amount of bits that will be employed to represent them. This scenario needs far more than 35 networks and fewer than 1,000 workstations on every single network. When you convert the subnet masks as described in the chapter, you are going to see that the mask in choice A makes it possible for for a lot more than 60 networks and additional than 1,000 hosts. All of the other selections are deficient in either the number of networks or the amount of hosts that they represent.