Mar 20, 2020 · The best free public DNS servers include Google, Quad9, OpenDNS, Cloudflare, CleanBrowsing, Verisign, Alternate DNS, and AdGuard DNS. 4.2.2.4, and/or 4.2.2.5, but
4.2.2.4 همه برای شرکت sun بود و 8.8.8.8 8.8.4.4 برای شرکت گوگل است این سرورها سرویس dns می دهند. یعنی تبدیل Google also operates an open DNS at 8.8.8.8 and 8.8.4.4. The DNS is a lookup table, it changes a domain name to an IP address for computers to work properly. Think of it as a big "phone book" for the internet. You look for "Yahoo.com" a DNS server somewhere tells your system the nearest IP for you to use and sends that information to your system. DNS cache poisoning attack site.bl it pl - 2011-09-16 Level 3 Communications' public DNS servers 4.2.2.2-4.2.2.6 - 2012-05-24 Anyone know what this address is. Jul 13, 2016 · 4.2.2.1 is one of the earliest DNS servers that were hosted by BBNplanet back in the mid-90s during the birth of the Internet. It later was part of GTE internetworking when they acquired BBNplanet, was briefly part of Verizon when BellAtlantic acq Jul 01, 2020 · This DNS server list was last updated in July 2020. A list of the best public and completely free DNS servers, plus how to change them. 4.2.2.3, 4.2.2.4, and/or 4
DNS assignment is done through DHCP. If your controller is giving out DHCP addresses, then check the scope: show running-config | begin "ip dhcp pool" Look for the dns-server entry for the respective scope. ip dhcp pool vlan10 default-router 10.10.10.1 dns-server 4.2.2.2 4.2.2.1 domain-name domain.com lease 0 6 0 0 network 10.10.10.0 255.255.255.0
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There's also 4.2.2.4. 4.2.2.1 - 4.2.2.4 are Level 3's private DNS servers. They aren't for public use. That's true, maybe they should white list ranges that are allowed to use it. It's been widely known and used for years in Internet time.
In the past I was always told by colleagues 4.2.2.2 appears to work faster and have to combine that with Google's public DNS*. Using 8.8.8.8 as primary and 4.2.2.2 as secondary. However, Google only 4.2.4.4 Packet Tracer - Connecting a Wired and Wireless Sep 09, 2017 How to Change the DNS Server on Your iPhone or iPad