Network Topologies
Definition
Network topologies describe how devices and connections are arranged in a network. Topology influences performance, resilience, troubleshooting, cost, and security because it affects how traffic flows and where single points of failure can exist.
Examples
- A home network typically uses a star topology where devices connect to a central router or switch.
- A company uses a partial mesh between core sites so links can fail without cutting off connectivity.
Point-to-point:
A point-to-point topology is the simplest arrangement: one direct connection between two endpoints. This could be a cable between two devices, a dedicated fiber circuit between two buildings, or a VPN tunnel between two gateways.
Point-to-point links are easy to understand and troubleshoot because there is only one path. The trade-off is resilience. If the link fails, communication stops unless there is a backup path. From a security perspective, point-to-point links are often easier to protect because the connection is narrowly scoped, but they still need encryption and strong authentication when the transport is not fully trusted.
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