What are the differences between tcp connections and udp connections? why is dns run over udp?

The difference between TCP connections and UDP connections are :

TCP  are connection oriented while UDP is connectionless.

The speed for TCP is slower than UDP.

TCP connection is reliable than UDP connection.

In TCP their guarantee that the data is transferred but in UDP their is not guarantee that the data transferred .

The  header size is 20 bytes In TCP but in UDP header size is 8bytes.

In TCP connection their is an Acknowledgement segments while in UDP their is their is no Acknowledgement segments.

In TCP their is 3 way handshaking takeplacebut  in UDP  their is no handshaking.

The DNS run over UDP because

if DNS using TCP the load is increases on server thats why DNS uses UDP    DNS requests are small so they run on UDP segments.As UDP is not reliable but DNS run over UDP  so reliability also increases in UDP

answer; by the southern association of colleges and schools commissions(institutional accreditation)

try this:

go tos official website.

click on your profile pic at the top right of the screen and click 'edit profile'.

click on "preferences" and press "year of birth".

and then just maybe try to reset whatever error made before by typing in the correct age details again. hope this !