Science and Engineering Assessment

COLLEGE OF SCIENCE AND
ENGINEERING
Supplementary Assessment – Tri 2 -
2017
Objective:
 IP sub-netting and IP subnet design
 Perform basic IP routing
1 IP Sub-netting (30 marks)
Give a network address 192.168.48.0/24 (
Replace xx by
the last 2 number of your student ID. For example, if your
student number is s012345678, then replace xx by 78. Your
network will be 192.168.78.0/24)
Perform IP sub-netting for the above given network address into
8 subnets such that each subnet has the same number of IP
Addresses.
Fill-in the sub-network information into the following table:
Subnet - 1
Network Address 192.168.48.0
Subnet Mask 255.255.255.224
Broadcast Address 192.168.48.31
Valid host address range (can be
used to assign to PCs, servers, IP
phones, etc.)
192.168.48.1 - 192.168.48.30
Subnet - 2
Network Address 192.168.48.32
Subnet Mask 255.255.255.224
Broadcast Address 192.168.48.63
Valid host address range (can be
used to assign to PCs, servers, IP
phones, etc.)
192.168.48.33 - 192.168.48.62
Subnet - 3
Network Address 192.168.48.64
Subnet Mask 255.255.255.224
Broadcast Address 192.168.48.95
Valid host address range (can be
used to assign to PCs, servers, IP
phones, etc.)
192.168.48.65 - 192.168.48.94
Subnet - 4
Network Address 192.168.48.96
NIT1104 – COMPUTER NETWORKS – A2 2017

COLLEGE OF SCIENCE AND
ENGINEERING
Subnet Mask 255.255.255.224
Broadcast Address 192.168.48.127
Valid host address range (can be
used to assign to PCs, servers, IP
phones, etc.)
192.168.48.97 - 192.168.48.126
Subnet - 5
Network Address 192.168.48.128
Subnet Mask 255.255.255.248
Broadcast Address 192.168.48.135
Valid host address range (can be
used to assign to PCs, servers, IP
phones, etc.)
192.168.48.129 - 192.168.48.134
Subnet – 6
Network Address 192.168.48.136
Subnet Mask 255.255.255.248
Broadcast Address 192.168.48.143
Valid host address range (can be
used to assign to PCs, servers, IP
phones, etc.)
192.168.48.137 - 192.168.48.142
Subnet – 7
Network Address 192.168.48.144
Subnet Mask 255.255.255.248
Broadcast Address 192.168.48.151
Valid host address range (can be
used to assign to PCs, servers, IP
phones, etc.)
192.168.48.145 - 192.168.48.150
Subnet – 8
Network Address 192.168.48.152
Subnet Mask 255.255.255.248
Broadcast Address 192.168.48.159
Valid host address range (can be
used to assign to PCs, servers, IP
phones, etc.)
192.168.48.153 - 192.168.48.158
2 IP Routing configuration (40 marks)
Given the following network topology
NIT1104 – COMPUTER NETWORKS – A2 2017

COLLEGE OF SCIENCE AND
ENGINEERING
Allocate Sub-networks that you designed in question 1 to each
sub-network in the above network topology. Fill in the
corresponding sub-network Address into the following table.
NET-D 192.168.48.97/27
NET-C 192.168.48.65/27
NET-B 192.168.48.33/27
NET-A 192.168.48.1/27
RA-RB subnet 192.168.48.129/29
RA-RC subnet 192.168.48.138/29
RB-RC subnet 192.168.48.145/29
RC-RD subnet 192.168.48.153/29
Assign valid IP addresses of the corresponding subnets to PC
and Ports on the Routers. Filled in your assigned IP
addresses and subnet mask into the following table:
NET-A
IP Address of PC / subnet mask 192.168.48.2/27
IP Address of Router Port /
subnet mask
192.168.48.1/27
NET-B
IP Address of PC / subnet mask 192.168.48.34/27
IP Address of Router Port /
subnet mask
192.168.48.33/27
NET-C
IP Address of PC / subnet mask 192.168.48.66/27
IP Address of Router Port /
subnet mask
192.168.48.65/27
NET-D
NIT1104 – COMPUTER NETWORKS – A2 2017