Module 3b - Networking Basics

Question 1

What do IP address identify?

Answer 1

Hosts

Question 2

What to TCP ports identify?

Answer 2

Processes at the endpoints of a connection

Question 3

Out of UDP and TCP which one of them is connectionless?

Answer 3

UDP is connectionless, it is a one way communication with no acknowledgement from the receiver

Question 4

What is ICMP?

Answer 4

Internet Control Message Protocol

It is a tool used to echo requests, reply messages, and report errors

Question 5

What are sockets?

Answer 5

They’re an API for inter-process communication. Sockets are used to facilitate communication end points.

Question 6

What does it mean to “bind” to a socket

Answer 6

Attach a local address to a socket

Question 7

What does it mean to “listen” in a socket?

Answer 7

Announce willingness to accept connections

Question 8

What does it mean to “accept” in a socket?

Answer 8

Block the caller until a connection request arrives

Question 9

What does it mean to “connect” to a remote socket?

Answer 9

Actively attempt to establish a connection

Question 10

What is the typical socket workflow for a server process?

Answer 10

Socket -> Bind -> Listen -> Accept -> Read -> Write -> Close

Question 11

What is the typical socket workflow for a client process?

Answer 11

Socket -> Connect -> Write -> Read -> Close

Question 12

What are the 5 major networking layers from OSI model (Open Systems Intercommunication) from top to bottom?

Answer 12

Application Layer
Transport Layer
Network Layer
Data Link Layer
Physical Layer