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If the organization's firewall protecting the authoritative DNS server allowed the TCP port 53 packets and the DNS server was configured to allow zone transfers to ...
Hi guys, I have two non-trusted Domains A and B and I want to configure DNS forwarder in Domain A to Domain B, so that DNS queries from Domain A should get ...
DNS uses UDP for DNS Queries over Port: 53. A client computer will always send a DNS Query using UDP Protocol over Port 53. ... Why DNS Works On Both TCP and UDP.
The correct answer is TCP- Transfers; UDP- Queries. The DNS uses TCP Port 53 for zone transfers, for maintaining coherence between the DNS database and the server.
Otherwise, the query is sent again using the Transmission Control Protocol (TCP). TCP is also used for tasks such as zone transfers. ... Domain Name System ...
HTTP GET Request on port 53 ... 222 blocked because they are destined to TCP port 53 but ... see also DNS traffic over port 53 (UDP, maybe TCP) ...
This is a list of TCP and UDP port numbers used by protocols of the application layer of the Internet protocol ... 53: Yes: Yes: Official: Domain Name System (DNS) 54:
Possible Duplicate: Is it true that a nameserver have to answer queries over TCP? I know DNS uses UDP for most of its queries, but in what circumstances will it use TCP instead?
SG Ports Services and Protocols - Port 53 tcp/udp information, official and unofficial assignments, known security risks, trojans and applications use.
The DNS resolver sends a query message to the recursive resolver asking for the address of www.cisco.com.; The DNS recursor sends a query message to the root name servers looking for the .com domain name space.