CSNB213: Data Communication and Computer Networks

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Oct 24, 2013 (3 years and 7 months ago)

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CSNB213: Data Communication and Computer Networks



Assignment

2

(
10
0

marks)


Instruction:

Work in a group of 2 to 3 students. Answer
ALL

questions.
All answers must
be handwritten. Printed submission will not be accepted.


1.

Differentiate between unicast,
l
imited
broadcast
, directed broadcast

and multicast.

[
4

marks]


2.

Give the three IP address range that have been reserved for private IP addresses.

[3

marks]


3.

Define the following types of IP address.

a)

Public IP address

b)

Private IP address

c)

Static IP address

d)

Dyn
amic IP address

[4 marks]


4.

For each of the following type
s of host given in the table below
,
specify whether it
should use a public or private address, and whether it should use a dynamic or static
address.

Host

Public / Private

Static / Dynamic

A compute
r used by a staff in an
organization



A printer shared by staffs in an
organization



The Web server of a company

that
hosts the company’s main Web site



A r潵ter interface c潮necte搠t漠o⁌AN



A r潵ter interface c潮necte搠 t漠 a
tAN

c潮necti潮




[㄰

mar歳]




Given the host IP address 203.80.20.102, find the following information.

a)

Network
address

class (class A, B or C).

[1 mark]

b)

Major network address. (Hint: Major network address is obtained by ANDing the
host IP address with the default subnet mask f
or the network
address
class).

[
1

mark]

c)

Major broadcast address.

[
1

mark]

d)

First host address of the major network.

[
1

mark]

e)

Last host address of the major network.

[
1

mark]

f)

Say that several subnets are created from the network address found in question
(b)

above, and the subnet mask used for the subnets are 255.255.255.224. Based
on this information,
find out
how

many subnets have been created.

[2 marks]


6.

Divide the
address block 200.30.25
.128/25 i
nto four subnets

(this can include the first
and the last su
bnet)
.

a)

How many host bits need to be used to identify the different subnets?

[2 marks]

b)

What is the subnet mask to be used for the subnets?

[2 marks
]

c)

How many host
s

can each subnet support?

[2 marks]

d)

For each subnet created, find the network address, broadc
ast address and the
range for host addresses
.

[16

marks]


7.

Divide the address block 180.28.64.0/19 into five subnets.

a)

How many host bits need to be used to identify the different subnets?

[2 marks]

b)

What is the subnet mask to be used for the subnets?

[2 mark
s]

c)

How many hosts can each subnet support?

[2 marks]

d)

For each subnet created, find the network address, broadcast address a
nd the
range for host addresses.

[20 marks]


8.

Divide the address block 75.28.112.0/20 into
as many subnets as possible
,
but
each
subne
t must be able to support at least
1000

hosts.

a)

To support
1000

hosts, how many host bits are required?

[2 marks]

b)

Given that each subnet must support at least
1000
hosts, w
hat is the maximum
number of

useable

subnets that can be created from the
address blo
ck above
?

(
“useable” means
excluding the first and the last subnet
)
.

[2 marks]

c)

What is the subnet mask to be used for the subnets?

[2 marks]

d)

For each

useable

subnet created, find the network address, broadcast address and
the range for host addresses.

[
16

marks]


9.

When subnetting a network, the last subnet cannot be used. Why?


[2 marks]