slides05

Question 1

What is the most famous implementation of the 4 layer internet model?

Answer 1

TCP/IP

Question 2

whats the source of unreliability in the internet?

Answer 2

But wireless (Wi-Fi, etc.) and some wired (ADSL) are more unreliable than you might think

Question 3

in TCP/IP what protocols are included in the transport layer?

Answer 3

the transmission control protocol (TCP) and the user datagram protocol (UDP)

Question 4

how do you calculate the reliability of a standard at a certain level?

Answer 4

by its reliability + all recursive reliabilities of below standards

Question 5

How many protocols are there?

Answer 5

256, 109 of which are to be still assigned to potential new ones

Question 6

what does the OS kernel do in the top layer of TCPIP

Answer 6

OS kernel does TCP, UDP, IP, Ethernet, Wi-Fi, etc. so that developers don’t need to

Question 7

MIME

Answer 7

Multipurpose Internet Mail Extensions (MIME) standard is a way to encode data (e.g., text, sound, pictures, video) in a safe way

Question 8

talk about session

Answer 8

many applications do not want session management, and should not have to pay the overhead of supporting it

Question 9

when was OSI, IM and TCP/IP invented

Answer 9

OSI was developed before an implementation; the Internet

Model was created after TCP/IP

Question 10

are implementations following standards based on OSI good?

Answer 10

no

Question 11

what makes a standard good?

Answer 11

by how rational, useful and non redundant is what it requires

Question 12

other models?

Answer 12

Tanenbaum’s Five Layer Model