Network — Design

Modern networks assume the perimeter is porous. Design-level security includes:

A "solid" design anticipates growth. This involves using modular hardware and a structured IP addressing scheme (IPv6 or CIDR) that allows for easy expansion without reconfiguring the entire system. network design

Implementing Next-Generation Firewalls (NGFW) and Intrusion Prevention Systems (IPS) at the boundary between the internal network and the internet. 4. Modern Evolution: SD-WAN and Cloud Modern networks assume the perimeter is porous

High availability is non-negotiable. Designers use dual-homing (connecting a switch to two upstream devices) and protocols like STP (Spanning Tree Protocol) or LACP (Link Aggregation Control Protocol) to ensure that if one cable or switch fails, the network stays live. Designers use dual-homing (connecting a switch to two

The "driveways." This is where end-user devices (PCs, printers, Wi-Fi APs) connect. It focuses on port security and providing power (PoE) to devices. 2. Core Principles: Performance and Reliability

The "highway" of the network. Its sole purpose is to switch traffic as fast as possible. It avoids complex packet manipulation to maintain maximum speed.