VCP-310,640-802 dumps and 350-001 testking

You are designing an IP addressing strategy for the Willow Bridge, Inc. network.
You need to take a decision as to which subnet mask you will use in the New York
office.

What should you do?

A. You should use 255.248.0.0 on the New York office.
B. You should use 255.255.252.0 on the New York office.
C. You should use 255.255.248.0 on the New York office.
D. You should use 255.255.255.128 on the New York office.
E. You should use 255.255.240.0 on the New York office.
F. You should use 255.255.192.0 on the New York office.
G. You should use 255.255.128.0 on the New York office.
Answer: E
Explanation: A subnet mask is the leftmost bits in an IP address that are used for
network identification.350-001 The remaining rightmost bits of an IP address are used for
identification of hosts on the network.640-802 To be able to determine the correct subnet mask
for a network, you need to take into account the number of network devices on the
network.VCP-310 Since there are 2,300 users in the New York office, you should provide for
2,300 IP addresses, therefore you should use the 20 bit mask 255.255.240.0 subnet mask.
Under this mask, 12 bits are reserves for host IDs, which allows for 4,094 host IDs,
which would be sufficient in this scenario for the New York office.

Incorrect answers:
A: This 255.248.0.0 subnet mask would be excessive as it allows for over a half million
host IDs.
B: This subnet mask would work for the Los Angeles office or even the Chicago office,
under the 255.255.252.0 subnet mask, 10 bits are reserved for host IDs, which allows for
1,022 host IDs. This would be ideal for the Los Angeles or Chicago offices.
C: 255.255.248.0 allows for 2,046 Host IDs. This is excessive for the branch offices but
insufficient for the New York office.


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D: 255.255.255.128 allows for 126 host IDs because only 7 bits under this mask is
reserved for host IDs which would be ideal for any of the agencies.
F: 255.255.192.0 allows for over 16,000 host IDs which is way too excessive for any of
the Willow Bridge, Inc. offices or agencies.
G: 255.255.128.0 allows for 32,000 host IDs which is way too excessive for any of the
Willow Bridge, Inc. offices or agencies,

Reference:
Microsoft Windows Server 2003 Deployment Kit: Deploying network services -
designing a TCP/IP Network

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