COIT20264 (HT1, 2019) - OZ Dispatch Network Design Presentation

This presentation analyzes the network design of OZ Dispatch, a company with a network comprising of Parramatta office and Collection Distribution Centres. The presentation details the network's wireless connectivity, implemented via Cisco WLAN controllers, and the use of DHCP protocol for smartphones in CDCs. It discusses the overall network architecture, including the core components like routers and firewalls, and the distribution of connections through switches. The IP addressing method, CIDR, is explained for its efficiency. The presentation also covers the network's security measures, highlighting the use of a Cisco ASA Firewall 5505 for authentication, packet filtering, and threat protection. References to relevant research papers are included to support the network design choices.

A presentation on OZ
Dispatch Network

OZ Dispatch Network
 The network of OZ Dispatch comprises two types of networks.
 One type of network is the one at the Parramatta office connecting the
servers, workstations and smartphones.
 The other is of the Collection Distribution Centres providing connections
to smartphones only.
 Both wired and wireless connectivity is used in the Parramatta Office for
connecting individual devices.
 Only wireless connectivity ensures connections to smartphones in the
CDCs via DHCP protocol.

Wireless Connectivity
 Wireless Connectivity is an
essential feature of OZ Dispatch
network.
 This wireless connectivity is
ensured by wireless LAN
controllers from Cisco.
 Smartphones are provided
network access in every branch
by these WLAN connectors
(Soares et al. 2017).

Sections of OZ Dispatch network
Parramatta office
network CDC network

Overall network of OZ Dispatch
 The overall network of OZ
Dispatch is given in the diagram
drawn in Cisco Packet Tracer
(Čabarkapa 2015).
 The routers and firewall forms
the core.
 Then the core switch distributes
the connections to the different
branches of the company.
 The switches of respective
branches provide access to
individual devices.

IP Addressing Method - CIDR
 CIDR replaces the old classful IP
addressing method.
 Smoother transitions in number
of IP addresses available can be
made by changing the CIDR
value (Shirmarz and Sabaei
2016).
 Thus CIDR is more efficient
compared classful IP addressing
and prevents waste of IPs.

Routers and Switches
 The router RV 320 from Cisco is
being used for routing
connections of the network.
 For the switch the SG350 also
from Cisco has been installed to
implement the network.

Security of OZ Dispatch Network
 Security is ensured by means of a
firewall device installed near the
core router.
 This firewall device is the Cisco ASA
Firewall 5505 built on Adaptive
Security Appliance (Šimon, Huraj
and Čerňanský 2015).
 The firewall plays multiple roles in
providing security to the network
 These roles include authentication,
packet filtering, proactive threat
protection and the like.

References
 Čabarkapa, D., 2015. Application of Cisco Packet Tracer 6.2 in teaching
of advanced computer networks. INFORMATION TECHNOLOGY AND
DEVELOPMENT OF EDUCATION ITRO 2015, p.153.
 Shirmarz, A. and Sabaei, M., 2016. Evaluation and Comparison of Binary
Trie base IP Lookup Algorithms with Real Edge Router IP Prefix
Dataset. Evaluation, 7(6).
 Šimon, M., Huraj, L. and Čerňanský, M., 2015. Performance evaluations
of IPTables firewall solutions under DDoS attacks. Journal of Applied
Mathematics, Statistics and Informatics, 11(2), pp.35-45.
 Soares, E., Brandão, P., Prior, R. and Aguiar, A., 2017, March.
Experimentation with MANETs of smartphones. In 2017 Wireless Days
(pp. 155-158). IEEE.