TCP and UDP
Two transport protocols that backend developers encounter constantly. A summary of TCP and UDP — connection establishment, reliability guarantees, flow/congestion control mechanisms, and selection criteria.
Tcp
The OSI Model as Working Vocabulary
L2 switch, L3 routing, L4/L7 load balancer — where the layer numbers attached to everyday networking terms come from. How the OSI model maps to TCP/IP, and what each number refers to.