For example, if everyone in an office needs to access the same training video on a particular website on the same day, the local DNS server would only have to resolve the name once, and then it can serve all the
What is DNS? The Domain Name System (DNS) is the component of the internet standard protocol responsible for converting human-friendly domain names into the internet protocol (IP) addresses computers use to identify each other on the network. Often called the “phonebook for the internet,” a...
Root name server direction: If necessary data isn’t in its cache, the recursive resolver queries one of 13 root name servers globally distributed and replicated via anycast networking. These serve at the topmost level in the DNS hierarchy and direct where the next part of the hostname should...
DNS Relay Agent If the IP address of a DNS server changes, the configuration of each DNS client on the user network needs to be updated accordingly. This is both time consuming and error prone. To resolve this issue, you can deploy a DNS relay agent. In such cases, configure the IP ad...
If a malicious party operates, hacks, or gains physical access to a DNS resolver, they can more easily alter cached data. *In networking, a port is a virtual point of communication reception. Computers have multiple ports, each with their own number, and for computers to talk to each ...
In other words, the IP address is akin to a phone number assigned to a smartphone. TCP is the computer networking version of the technology used to make the smartphone ring and enable its user to talk to the person who called them. ...
DNSSEC is a feature of the Domain Name System (DNS) that uses cryptographic authentication to verify the authenticity of DNS records returned in a DNS query.
A DNS amplification attack is a type of DDoS attack. To execute it, the attacker takes advantage of a DNS server that permits recursive lookups and uses recursion to spread the attack to other DNS servers. Fast-flux DNS In a fast-flux attack, the attacker swaps DNS records in and out at...
What's the difference between DNS and DDNS? Both DNS and DDNS implement lookups from domain names to IP addresses. The two services are almost identical; however, there is a difference in the frequency at which theDNS server'srecords are updated. ...
What is Zero Trust Network Access (ZTNA)? Zero Trust Network Access, also known as software-defined perimeter (SDP), is a modern approach to securing access to applications and services both for users in the office and on the road. How ZTNA works is simple: deny everyone and everything...