Introduction – Overview of computer networks and network security

Application layer – Overview of HTTP, FTP, SMTP and DNS and socket programming. Weaknesses, vulnerabilities and attacks against above protocols – hijacking, spoofing and DoS attacks. Attacks using above protocols: simple, amplified and distributed DoS attacks.

Application layer security – Goals, cryptography primitives and principles, TLS – Objectives, protocol, working and features, PGP: Overview, objective, working, features and limitations. Firewalls, Intrusion Detection Systems and Intrusion Prevention Systems.Future directions. Transport layer – Introduction, objectives, unreliable data transfer and UDP, general principles of reliable data transfer, TCP: Overview, reliable data transfer, flow control, congestion control. Attacks against transport layer protocols: UDP flooding, TCP spoofing, TCP connection hijacking, TCP SYN flood.

Network layer – Addressing schemes(IPv4 and IPv6), Forwarding and routing in Internet, Routing algorithms, Routing protocols in Internet(OSPF, RIP and BGP), BGP security, ICMP, NAT, IPSec – Introduction, Tunnel and Transfer Modes, IPSec Authentication Header, Encapsulating Security Header and Payload, IPSec Key Exchange and VPNs.

Link layer – Introduction and services, Link layer addressing, Multiple Access Protocols, Ethernet, ARP, Attacks against and vulnerabilities in ARP.