Question: What Two Protocols Can Use Both UDP And TCP?

Does SNMP use UDP?

SNMP operates in the application layer of the Internet protocol suite.

All SNMP messages are transported via User Datagram Protocol (UDP).

The SNMP agent receives requests on UDP port 161..

Which protocols use both TCP and UDP?

DNS uses TCP for zone exchanges between servers and UDP when a client is trying to resolve a hostname to an IP address.

Why UDP is used in DNS?

DNS Transport Protocol DNS uses the User Datagram Protocol (UDP) on port 53 to serve DNS queries. UDP is preferred because it is fast and has low overhead. A DNS query is a single UDP request from the DNS client followed by a single UDP reply from the server.

Where is UDP used?

UDP is commonly used for applications that are “lossy” (can handle some packet loss), such as streaming audio and video. It is also used for query-response applications, such as DNS queries.

Does imap4 use TCP or UDP?

Port 993 TCP UDP | imaps | IMAP over TLS protocol | imap4 protocol over TLS/SSLPortTransport LayerDescription993tcpIMAP over TLS protocol993udpimap4 protocol over TLS/SSL

Is port 80 TCP or UDP?

Like TCP (Transmission Control Protocol), UDP is used with IP (the Internet Protocol) but unlike TCP on Port 80, UDP Port 80 is connectionless and does not guarantee reliable communication; it’s up to the application that received the message on Port 80 to process any errors and verify correct delivery.

Is Ping a TCP protocol?

ICMP is part of TCP/IP protocol suite which resides on layer 3. … If you want the closest map onto the OSI layers, the answer is probably 3.5: ICMP (which is what ping uses) is implemented directly on top of IP packets and doesn’t use a transport layer (OSI layer 4) like TCP or UDP.

What is TCP ping?

TCP Ping is a TCP oriented ping alternative. It is used to test the reachability of a service on a host using TCP/IP and measure the time it takes to connect to the specifed port. Please provide the IP or DNS hostname you would like to TCP Ping.

Does HTTP use TCP or UDP?

HTTP uses TCP because the files, images, web pages which we get from the remote host should not be dropped on the way and it should be delivered in order to the HTTP client. HTTP could also use UDP but usually not, if a UDP packet containing the first part of a web page is lost, then its not retransmitted.

Why does DNS use both TCP and UDP?

DNS uses TCP for Zone transfer and UDP for name queries either regular (primary) or reverse. UDP can be used to exchange small information whereas TCP must be used to exchange information larger than 512 bytes. … For example, a domain client finding a domain controller using DNS.

Is port 53 UDP or TCP?

The DNS uses TCP Port 53 for zone transfers, for maintaining coherence between the DNS database and the server. The UDP protocol is used when a client sends a query to the DNS server.


Correspondingly, most TCP/IP network equipment comes with an SNMP management agent. SNMP is a request/response protocol. UDP port 161 is its well-known port. SNMP uses UDP as its transport protocol because it has no need for the overhead of TCP.

Can use both TCP and UDP at the same time?

Yes, you can use the same port number for both TCP and UDP. … Technically the port pools for each protocol are completely independent, but for higher level protocols that can use either TCP or UDP it’s convention that they default to the same port number.

Is Ping UDP or TCP?

The standard ping command does not use TCP or UDP. It uses ICMP. To be more precise ICMP type 8 (echo message) and type 0 (echo reply message) are used.

What is TCP UDP?

TCP is a connection-oriented protocol and UDP is a connection-less protocol. TCP establishes a connection between a sender and receiver before data can be sent. UDP does not establish a connection before sending data.