stupid layers and protocols

Question 1

app layer

Answer 1

deals w/ client,software +protocols
that need to be used
eg mail/webpages

Question 2

transport layer

Answer 2

creates,sequences +error checks packets
establishes connections:
1-to-1 (tcp) / 1-to-many (udp)

Question 3

internet layer

Answer 3

addresses, packages, & routes functions

Question 4

network access layer

Answer 4

places tcp/ip packets on the network medium (wifi/cable)