DNS Request

Question

Consider a DNS request sent from your laptop. If it is connected to Ethernet, what is the sequence of packet headers on this request packet starting from the outer most header.(We are using the term header loosely when it comes to DNS.)

1.  Ethernet, IP, UDP, DNS
2. DNS, UDP, IP, Ethernet
3.  IP, TCP
4.  Ethernet, TCP, IP, DNS

Answer 1

DNS uses UDP as transport layer protocol as we only need one request and reply!....so ur request will go from top layers to bottom adding their headers.,.
first one will be UDP header
then IP header
then ethernet header
so from outermost,option A is right!!!