A Presentation on ICT Networks

A Presentation on ICT
Networks

Networking Goals
 The company XYZ requires a network infrastructure to setup LAN
networks for its branches at Sydney, Melbourne and Adelaide.
 The overall network of the company must ensure inter departmental
data transfer within each of these LAN networks.
 The LAN networks of Sydney, Melbourne and Adelaide require 63, 53
and 43 IP addresses of subnets A, B and C respectively.
 The router of the Sydney network connects routers of Melbourne and
Adelaide with two IP addresses of subnet D.
 Every host must also be able to access the Internet.
 Every LAN network should support wireless network connectivity.

Networking Architecture and Purpose
 The network design follows the
three-layered hierarchical
network architecture.
 Network designs based on this
model is to use minimum
networking devices.
 Such designs also ensure that
the network is easily scalable
and expandable.

Network Design
 The network proposed follows a
top down approach.
 The networking devices are
positioned across three layers –
core, distribution and access.
 Core contains the routers,
distribution comprises of L3
switches and access consists of
L2 switches.
 Wireless network connectivity is
ensured by wireless access
points.

IP Assigning and DHCP
 The IP addresses for the hosts of
the network are assigned
automatically through DHCP.
 The DHCP services are
configured in the Windows, DNS
and Linux servers respectively.
 IP addresses of these servers
are manually configured.

IP Address Configuration (Melbourne)
DHCP configuration of
host PCs
Manual configuration of
DNS server

Network Connectivity
Inter-department
connectivity Internet connectivity

Subnet Classification
 The subnet classification of the
major network is given in
tabular format.
 The table lists the actual
requirement, allocated address
space, network address, CIDR
mask, subnet mask, assignable
IP range and broadcast address.
 Details of all four subnets (A, B,
C and D) are mentioned.
Subnet
Name
Needed Size
Allocated
Size
Address Mask Dec Mask
Assignable
Range
Broadcast
Sydney (Sub
A)
63 126 193.168.111.0 /25
255.255.255.1
28
193.168.111.1
-
193.168.111.1
26
193.168.111.1
27
Melbourne
(Sub B)
53 62
193.168.121.1
28
/26
255.255.255.1
92
193.168.121.1
29 -
193.168.121.1
90
193.168.121.1
91
Adelaide
(Sub C)
43 62
193.168.131.1
92
/26
255.255.255.1
92
193.168.131.1
93 -
193.168.131.2
54
193.168.131.2
55
Interconnect
Sub D
4 6 193.168.101.0 /29
255.255.255.2
48
193.168.101.1
-
193.168.101.6
193.168.101.7

IP Addressing Scheme
 The subnet classification is performed on the major network
193.168.100.0 /23 which has been purchased by the company from the
ISP.
 The IP addressing is performed based on CIDR or Classless Inter-Domain
Routing.
 The translated private network addresses are 193.168.101.0 for
connecting routers, 193.168.111.0 for Sydney network, 193.168.121.0
for Melbourne network and 193.168.131.0 for Adelaide network.
 The CIDR masks of the router IP addresses for the LAN networks of
Sydney, Melbourne and Adelaide are /25, /25 and /26 respectively
(Mejías et al. 2017).

Networking Devices
Router: The routers are responsible for
routing of different networks (Miao et
al. 2017).
Router: The WAN networks are routed
through RIP and
Router: The router IP address gets used
as default gateway in the respective
LAN networks.
L3 Switch: The L3 switch serves to
distribute the network from the router
to multiple L2 switches (Shukla et al.
2019).
L2 Switch: The L2 switches are used to
directly connect the host devices
(Miano et al. 2019).
Wireless AP: The wireless access points
are used to provide wireless network
services to supported devices.

Conclusions
 The presentation successfully summarises the goals of the network to
be proposed to company XYZ.
 The presentation then talks about the architecture followed for
designing the network.
 The proposed network design is then given along with justification for
the design with respect to requirements.
 The IP configurations and network connectivity is then validated.
 Thereafter the IP addressing and subnet classification is provided.
 Then the presentation discusses the use of the different networking
hardware that gets used in the overall network.

References
 Mejías, A., Herrera, R.S., Márquez, M.A., Calderón, A.J., González, I. and
Andújar, J.M., 2017. Easy handling of sensors and actuators over TCP/IP
networks by open source hardware/software. Sensors, 17(1), p.94.
 Miano, S., Risso, F. and Woesner, H., 2017, July. Partial offloading of OpenFlow
rules on a traditional hardware switch ASIC. In 2017 IEEE Conference on
Network Softwarization (NetSoft) (pp. 1-9). IEEE.
 Miao, J., Zhang, N., Kang, C., Wang, J., Wang, Y. and Xia, Q., 2017. Steady-state
power flow model of energy router embedded AC network and its application
in optimizing power system operation. IEEE Transactions on Smart Grid, 9(5),
pp.4828-4837.
 Shukla, A., Hudemann, K.N., Hecker, A. and Schmid, S., 2019, August. Runtime
Verification of P4 Switches with Reinforcement Learning. In Proceedings of the
2019 Workshop on Network Meets AI & ML (pp. 1-7).