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  1. Practice Subnet Questions

Practice Subnet Questions

1
Sub-netting

You have a network ID of 140.140.0.0 and need to break it down into a number of subnets. You need 600 host IDs per subnet, with the largest number of subnets available. Which of the following subnet masks should you use?

a)

255.255.240.0

b)

255.255.252.0

c)

255.255.224.0

d)

255.255.248.0

The correct answer is 255.255.252.0Incorrect, Try again

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2
Sub-netting

You have a network ID of 206.17.250.0 and need to divide it into nine subnets. You need to provide for the largest possible number of hosts per subnet. Which of the following subnet masks should you use?

a)

255.255.255.240

b)

255.255.255.192

c)

255.255.255.248

d)

255.255.255.224

The correct answer is 255.255.255.240Incorrect, Try again

Check your answer

3
Sub-netting

Jim works on a small network with two static routers (multi-homed gateways) his IP Address is 212.5.1.34

Router A IP Addresses are 212.5.1.40 and 212.5.1.67

Router B IP Addresses are 212.5.1.72 and 212.5.1.99

The subnet mask is 255.255.255.224

Jim needs to access on a regular basis a server that gives him access to the companies WAN. The server has an IP Address of 212.5.1.124. What IP Address should Jim enter as the default gateway in his netwrk adapter properties?

a)

212.5.1.40

b)

212.5.1.67

c)

212.5.1.72

d)

212.5.1.99

The correct answer is 212.5.1.40Incorrect, Try again

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4
Sub-netting

You are the Administrator of 2 subnets called Comet and Star with a sub-net mask of 255.255.240.0. A user on a Windows XP computer called North on the Star network complains that she can not connect to a Windows 2003 Server called Haley on the Comet network. No other users on the Star network are experiencing similar problems

The Ip addresses of the Router connecting the networks together are 154.44.50.2 (to Star) and 154.44.19.2 (to Comet)

You use the IPCONFIG command on North with the following results:

IP Address 154.44.17.10

Subnet Mask 255.255.240.0

Default Gateway 154.44.50.2

What could be the problem?

a)

The default gateway on North is incorrect

b)

The IP Address on North is incorrect

c)

The sub-net mask on North is incorrect

d)

The IP Address of Haley is incorrect

The correct answer is the IP Address of North is incorrect as this is configured on the wrong subnet. If the Server had the wrong IP Address no one would be able to comunicateIncorrect, Try again

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5
Sub-netting

You have been hired as a consultant to plan a TCP/IP network for a company that has the network address of 216.176.255.0 You determine that the network will need nine subnets. Which subnet mask will provide the highest number of hosts per subnet?

a)

255.255.255.240

b)

255.255.255.224

c)

255.255.255.248

d)

255.255.255.192

The correct answer is 255.255.255.240Incorrect, Try again

Check your answer

6
Sub-netting

You have a class C network address divided into 3 subnets, you will add 2 subnets in the next 2 years each subnet will have 25 hosts. What subnet mask should you use?

a)

255.255.255.192

b)

255.255.255.0

c)

255.255.255.248

d)

255.255.255.224

e)

none of the above

The correct answer is 255.255.255.224Incorrect, Try again

Check your answer

7
Sub-netting

Routers are configured on a subnetted network with IP Addresses of 215.34.23.34, 215.34.23.68 and 215.34.23.140. A subnet mask of 255.255.255.224 is in use, the following exist

HostP IP Address 215.34.23.32, default gateway 215.34.23.34

HostQ IP Address 215.34.23.62, default gateway 215.34.23.74

HostR IP Address 215.34.23.92, default gateway 215.34.23.68

HostS IP Address 215.34.23.130, default gateway 215.34.23.68

Host T IP Address 215.34.23.92, default gateway 215.34.23.140

Which one of the following connections will fail?

a)

HostQ with HostT

b)

HostS with HostR

c)

HostP with HostS

d)

HostR with HostT

The correct answer is all will failas:

HostP has an IP Address for the network.

HostQ and S have thw wrong gateway address.

HostT and R share the same IP Address.Incorrect, Try again

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8
Sub-netting

A network has 3 subnets and 2 multi-homed gateways, each has 2 ports with no static routing tables

HostX IP Address 175.40.1.6

HostY IP Address 175.40.2.7

HostZ IP Address 175.40.3.8

RouterA IPAddress 175.40.1.1 and 175.40.2.1

RouterB IP Address 175.40.2.2 and 175.40.3.1

HostA connects to RouterA at 175.40.1.1

HostY connects to RouterA at 175.40.2.1

HostZ connects to RouterA at 175.40.3.1

How do you set the gateways on the routers to ensure that every subnet address can reach every other subnet address?

The easiest way is to set up RIP or static routes on the routers, no gateways need then be configured. This is a trick question!!Check your answer

NOTE: If you have had difficulty understanding any of these questions then view this article from our blog.