What is DNS cache poisoning? | DNS spoofing
Attackers can poison a DNS cache by tricking DNS resolvers into caching false information, resulting in the resolver sending the wrong IP address to clients, and users attempting to navigate…
What is BGP? | BGP routing explained
Border Gateway Protocol (BGP) is the routing protocol for the Internet. Like the post office processing mail, BGP picks the most efficient routes for delivering Internet traffic. What is BGP?…
What is an autonomous system? | What are ASNs?
An autonomous system (AS) is a very large network or group of networks with a single routing policy. Each AS is assigned a unique ASN, which is a number that…
What is a DNS CNAME record?
The DNS CNAME record works as an alias for domain names that share a single IP address. A “canonical name” (CNAME) record points from an alias domain to a “canonical”…
What is blackhole routing?
Blackhole routing is a DDoS mitigation strategy that eliminates all traffic from specific sources. What is DDoS blackhole routing? DDoS blackhole routing/filtering (sometimes called blackholing), is a countermeasure to mitigate…
DNS root server
A DNS root server is the first stop in a DNS lookup. What is a DNS root server? The administration of the Domain Name System (DNS) is structured in a…
What is recursive DNS?
In DNS lookups, which match domain names to machine-readable IP addresses, the journey up the DNS tree can either be made by DNS. What is recursive DNS? A recursive DNS…
What is Anycast? | How does Anycast work?
Anycast is a network addressing and routing method in which incoming requests can be routed to various locations. What is Anycast? Anycast is a network addressing and routing method in…
What is a router?
A router is a networking device that connects two or more IP networks or subnetworks and connects various networked nodes. What is a router? A router is a device that…