Layer 3: Network

The Network Layer is responsible for packet forwarding and routing through intermediate routers.

Key Points
  • Handles addressing and routing of data packets
  • Manages traffic control and packet sequencing
  • Responsible for logical addressing (e.g., IP addresses)
  • Determines the best path for data transmission
  • Handles packet fragmentation and reassembly
  • Implements congestion control in network traffic
Attacks
  • IP Spoofing: Forging the source IP address in IP packets to impersonate another system or hide the true source of an attack.

  • ICMP Attacks: Misusing ICMP messages for reconnaissance (e.g., ping sweeps) or denial of service (e.g., ICMP flood).

  • Routing Attacks: Manipulating routing protocols to redirect traffic, potentially leading to man-in-the-middle attacks or network disruption.