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Q:

You need to subnet a network that has 5 subnets, each wit at least 16 hosts. Which classful subnet mask would you use?

A) 255.255.255.192	B) 255.255.255.224
C) 255.255.255.240	D) 255.255.255.248

Answer & Explanation Answer: B) 255.255.255.224

Explanation:

You need 5 subnets, each with at least 16 hosts. The mask 255.255.255.240 provides 16 subnets with 14 hosts - this will not work. The mask 255.255.255.224 provides 8 subnets, each with 30 hosts. This is the best answer.

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Q:

What is the subnetwork address for a host with the IP address 200.10.5.68/28?

A) 200.10.5.56	B) 200.10.5.32
C) 200.10.5.64	D) 200.10.5.0

Answer & Explanation Answer: C) 200.10.5.64

Explanation:

This is a pretty simple question. A/28 is 255.255.255.240, which means that our block size is 16 in the fourth octent. 0,16, 32, 48, 64, 80, etc. The host is in the 64 subnet.

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Q:

If a host on a network has the address 172.16.45.14/30, what is the subnetwork this host belongs to?

A) 172.16.45.0	B) 172.16.45.4
C) 172.16.45.8	D) 172.16.45.12

Answer & Explanation Answer: D) 172.16.45.12

Explanation:

A/30, regardless of the class of address, has a 252 in the fourth octet. This means we have a block size of 4 and our subnets are o,4,8,12,16, etc. Address 14 is obviously in the 12 subnet.

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Q:

Which class of IP address provides a maximum of only 254 host addresses per network ID?

A) Class A	B) Class B
C) Class C	D) Class D

Answer & Explanation Answer: C) Class C

Explanation:

Class C network address has only 8 bits for defining hosts : $2^{8} - 2 = 256 - 2 = 254$

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Q:

Convert the following from decimal IP address to binary format.

192.168.10.15

Answer

$\begin{matrix} Decimal & 128 & 64 & 32 & 16 & 8 & 4 & 2 & 1 &Binary \\ 192& 1 &1 & 0 & 0 & 0 & 0 & 0 & 0 & 11000000\\ 168& 1 &0 & 1 & 0 & 1 & 0 & 0 & 0 & 10101000\\ 10& 0& 0 &0 & 0 & 1 & 0 & 1 & 0 & 00001010\\ 15& 0 &0 & 0 & 0 & 1 & 1 & 1 & 1 & 00001111 \end{matrix}$

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Q:

What type of RJ45 UTP cable do you use to connect a PC's COM port to a router or switch console port?

A) Straight - through	B) Crossover cable
C) Crossover with a CSU/DSU	D) Rolled

Answer & Explanation Answer: D) Rolled

Explanation:

To connect to a router or switch console port, you would use an RJ45 UTP rolled cable.

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Q:

As per the National Forestry Report, 1998 , India must retain a true cover of 33 per cent as against the 19 per cent at present . A budgetary allocation of Rs 850 crore is just a drop in the ocean.

Conclusions:

I. The forest coverage in a country should be in proportion to its popullation

II. Inadequate budgetary allocation comes in the way of enhancing the forest coverage.

A) If only conclusion I follows	B) If only conclusion II follows
C) If neither I nor II follows	D) If both I and II follow

Answer & Explanation Answer: B) If only conclusion II follows

Explanation:

The relation of forest to population can't be derived from the statement. Hence I does not follow. From the second sentence and from the tone of the statement II can be derived. Hence follows.

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Filed Under: Statement and Conclusions

Q:

In a dinner party both fish and meat were served. Some took only fish and some only meat. There were some vegetarians who did not accept either. The rest accepted both fish and meat. Which of the following Venn-diagrams correctly reflects this situation?

A) 1	B) 2
C) 3	D) 4

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