3. Network Layer

Controls communication between broadcast domains.

So if you wanna go from one broadcast domain to another, you need layer 3. Specifically, a Router.

There's broadcast domains on layer 2 (VLANs) and on layer 3.

PDU: Packet

Protocol Data Unit at layer is callaed a Packet.

TOC

• Addressing Scheme: IP Address
  • Classful
  • Classless
  • Subnetting
• ARP: Adress Resolution Protocol
• Serial Connections
• IP Routing Theory
  • Dynamic Routing
    • RIP
    • EIGRP
    • OSPF
    • Hot Standby Routing Protocol
  • Static Routing
• IPv6
  • NDP: Neighbor Discovery Protocol