unit 5: getting down and dirty w/ networks

Question 1

application layer

Answer 1

to allow access to network resources

Question 2

presentation layer

Answer 2

to translate, encrypt and compress data

Question 3

session layer

Answer 3

to establish, manage, and terminate sessions
*API, Winsock, sockets

Question 4

transport layer

Answer 4

to provide reliable process to process message and error delivery

Question 5

network layer

Answer 5

to move packets from source to destination
to provide internetworking

Question 6

data link layer

Answer 6

to organize bits into frames
to provide hop-to-hop delivery

Question 7

physical layer

Answer 7

to transmit bits over a medium
to provide mechanical and electrical specifications
fibre, wireless, hubs, coax

Question 8

acronym for 7 layers

Answer 8

Please Do Not Throw Sausage Pizza Away

Question 9

protocol

Answer 9

a set of rules defining how two computers communicate w/ each other

Question 10

IPv4

Answer 10

a 32-bit Address that comprises binary digits separated by a dot

Question 11

IPv6

Answer 11

a 128-bit IP Address, which is written in a group of 8 hexadecimal numbers separated by a colon

Question 12

benefits of IPv6

Answer 12

*larger address space
*improved security
*simplified header format

Question 13

why is an IP address needed to connect to the internet?

Answer 13

identifies the device connected to the internet
routers use the IP addresses to direct data to the correct destination

Question 14

main difference between mac and IP addresses

Answer 14

MAC Address is used to ensure the physical address of the computer. It uniquely identifies the devices on a network. While IP addresses are used to uniquely identifies the connection of the network with that device takes part in a network.

Question 15

TCP/IP

Answer 15

communications protocol suite using which network devices can be connected to the internet

Question 16

OSI

Answer 16

conceptual framework which the functioning of a network can be described

Question 17

process of TCP/IP Model

Answer 17

1. application layer: encrypts/decrypts the message
2. transport layer: breaks the message into small packets and gives a number and the total number of packets on each packet
3. network layer: adds the IP address of sender and recipient to each packet. allows them to go to the right destination
4. data link layer: converts the packets into signals to send over the network