Application Layer

Question 1

Examples of DNS record types

Answer 1

A – Translates IP address into human-readable hostname

AAAA- Same as A record but for IPv6

NS – Record of authoritative name server

TXT – Record that is just text

Question 2

Describe the generic flow of a socket connection (the names of the functions)

Answer 2

socket() – Instantiates socket
bind() – Tell OS what address to use what port
listen() – notifies willingness to accept incoming connections
accept() – blocks waiting for connections, sets address of incomming connection
connect() – client side only
close() – client side

Question 3

HTTP is stateless yes or no

Answer 3

yes

Question 4

What is a short summary of what QUIC is

Answer 4

Basically a replacement of TCP without the 3 way handshake overhead, opens up several streams and is a form of UDP

Question 5

Grpc is…

Answer 5

a form of remote procedure call

used to extend the idea of a local procedure call to a remote server