The following are some network security topics which can be used to develop papers, projects or presentation.
1.Study on network and application firewalls.
2.Vulnerabilities of Spanning tree protocol and mitigations.
3.Methodologies to prevent IP fragmentation attacks.
4.Attacks based on a VLAN infrastructure.
5.Preventing Rogue DHCP servers on the network.
6.Defeating DDOS attacks with hosted solutions.
7.Perimeter router configuration to block IP spoofing attacks
8.Defeating TCP scan attacks with security solutions
9.ICMP based attacks and defense with Access control lists.
10.Bypassing web filters on the network.
For more topics, buy the E-book which contains 30 ideas with titles and abstracts in networking and security.