BGP

What is the Network Layer (OSI Layer 3)?

The Network layer is OSI Layer 3 — it is responsible for logical addressing (IP addresses) and routing, deciding the best path to move a packet from a source h…

What is BGP (Border Gateway Protocol)?

BGP is the path-vector routing protocol that connects autonomous systems across the internet, exchanging reachability information as a full list of the AS numb…

What is Anycast Routing?

Anycast is a routing method where the same IP address is announced from multiple physically distinct servers, and the network automatically routes each client…

What is a Router Routing Table?

A routing table is the data structure a router consults for every packet it forwards, listing known destination networks alongside the next-hop address and out…

Static vs Dynamic Routing: What is the Difference?

Static routing means an administrator manually configures fixed routes in a router’s routing table, while dynamic routing means routers automatically discover…

What is Route Summarization?

Route summarization (route aggregation) is the practice of combining multiple contiguous IP subnet routes into a single, shorter-prefix route so that routers a…

What is Equal-Cost Multipath (ECMP)?

Equal-Cost Multipath (ECMP) is a routing technique where a router installs and actively uses multiple paths to the same destination in its forwarding table sim…

What is Anycast DNS?

Anycast DNS is a routing technique where the same IP address is announced from multiple physically distributed DNS servers, and the internet’s routing infrastr…