Networking Notes

a quick map of the stack

Physical Layer

• NRZ
• Manchester encoding

Data Link Layer

frames up to 46–1500 bytes

• Ethernet — carries data frames
• Hub vs Switch — collision domain splitting, source MAC learning
• CRC
• LACP — link aggregation to increase bandwidth
• Spanning Tree Protocol — config / TCN
• ERPS

Network Layer

packets up to 65535 bytes

• CIDR — subnetting, IP addressing method
• DHCP — get address from server
• Unicast
• ARP — broadcast MAC with IP to L2 network
• Distance Vector Protocol — Bellman–Ford
• Link-State Protocol — Dijkstra
• NAT
• IPv4 / IPv6
• BGP — path-vector routing between ASes