What protocols is used to establish a connection with a web browser?

say i open browser and type www.yahoo.com. I have to assume that the cache arp table is clear, an IP has already been assigned to your machine.

need two protocol from application layer
one protocol from transport layer
need two protocol from network layer

THanks!

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SecurityThroughObscurity

DNS, HTTP
TCP
IPv4, ARP

FYou

so if i say dhcp for application and for network ip and icmp it will be incorrect for this type of question?? Thanks Security!!

SecurityThroughObscurity

IPv4 = IP

FYou

so can i say dhcp, http for the application? i know http is clearly use.

SecurityThroughObscurity

You don't need DHCP because an IP has already been assigned.

FYou

and what about telnet, or ssh? OIC. Yea the question is tricky lol.

SecurityThroughObscurity

for opening a web-site?

FYou

for establishing a connection?

SecurityThroughObscurity

I mean You don't need those protocols (telnet, ssh) for establishing a conn.

FYou

I see. So the answers for application is DNS, and HTTP nothing else.
And for Network layer is only ARP and IP and can't be anything else.

carlolewis

Yes FYou thats correct.

At the application Layer(s) You use DNS to resolve the IP address of Yahoo!. HTTP will later be used to view the webpage within your browser but in the question I'm not sure this counts as "Establishing a connection". There are other application layer protocols which could also be used such as HTTPS and SSL, but these will not cover the scenario you mentioned either.

At the Transport layer TCP will be used on port 80.

At the network layer, IP will be used, along with ARP. In this instance ARP will broadcast for the configured Default Gateway as the packet is leaving the local network.