Network security involves policies and practices to protect the integrity and usability of computer networks, including maintaining confidentiality, availability, and integrity. Common network attacks are browser attacks, where malware is spread through infected websites; traffic analysis, where an attacker analyzes communication paths; and distributed denial of service attacks, where networks are flooded with traffic. To secure networks, organizations should use firewalls, access control, strong passwords, antivirus software, encryption, and multifactored authentication.

1. Network Security
Talent Dzinoruma

2. What it is
• Any activity designed to protect the
usability and integrity of the network and
data.
• Consists of policies and practices adopted
to prevent and monitor unauthorized
access, misuse, modification or denial of
services of a computer network or
computer resource.

3. Why is it important
• To maintain integrity
(authentication)
• To ensure availability.
• To protect confidentiality.

4. Types of Attacks
• Browser Attack
• Web Attacks
• Traffic Analysis
• Brute Force Attack
• Eavesdropping
• Distributed Denial of Service
• Man In the Middle

5. Browser Attack
• The attacker breaches a machine through a web
browser.
• The attacker breach the website and infect it
with malware. When the user visits the site, the
site will force the malware into the system by
exploiting vulnerabilities in the system.
• Internet Explorer has the most vulnerabilities

6. Web Attacks

7. Traffic Analysis
• In the traffic analysis attack, an attacker
tries to sense the communication path
between the sender and receiver.
• An attacker can found the amount of data
which is travel from the route of sender
and receiver.

8. Brute Force Attack
• It is a type of network attack
• Rather than tricking a user into
downloading malware, the attacker tries to
discover the password through trial and
error.

9. Eavesdropping
• AKA snooping or sniffing attack
• The attacker captures the data packets.
• An attacker can find the path of the network if the
connection between parties is not encrypted.
• The main aim of this attack is to find out some
secret or confidential information from
communication.
• The attacker can read the confidential data, but he
cannot edit the data or cannot modify the data.

10. Distributed Denial Of Service
• It is an attack to make the network resource
unavailable to its users.
• It prevents normal use of the network.
• An attacker floods the entire network with
traffic until the network shuts down with
overload.
• The attacker may block the traffic which may
cause loss of access to the network by the
authorised user.

11. Distributed Denial Of Service

12. Man In The Middle
• The attacker alters the
communication between 2 parties
• Data/Information will be sent between
the user and the web application.
• The attacker will get in between and
spy.
• Standard Chartered issue(2008)

13. Man In The Middle

14. What to do to secure the
Network (1)
• Use VPN
• Use MAC for users
• Use firewalls which can filter the
information that might not be safe.
• Access Control

15. What to do to secure the
Network (2)
• Change the passwords frequently to avoid
hacking(BruteForce).
• Do not open spam emails without security.
• Use antivirus programs to detect and
prevent virus

16. What to do to secure the
Network (3)
• Use antimalware programs
• Implement good network encryption to
protect against passive attacks
• Use secure passwords

17. References
• Communication Systems and Network Technologies (CSNT)”, 2014 ,
ISBN:978-1-4799-3069-2,7-9 April 2014.
• Siddharth Ghansela “Network Security: Attacks, Tools and Techniques” ,
ijarcsse Volume 3, Issue 6, June 2013.
• Case Study: Network Clarity, SC Magazine 2014
• Cisco. (2011). What is network security?. Retrieved from cisco.com
• "Centralised Services: NewPENS moves forward - Eurocontrol.int". 17
January 2016. Archived from the original on 19 March 2017.
• K. Reimers, D. Andersson (2017) POST-SECONDARY EDUCATION
NETWORK SECURITY: THE END USER CHALLENGE AND EVOLVING
THREATS, ICERI2017 Proceedings, pp. 1787-1796.
• Multi-Vector Attacks Demand Multi-Vector Protection. MSSP Alert. July 24,
2018
• https://www.consumercomplaints.in/complaints/standard-chartered-bank-
credit-card-c595830.html