chapter 2

Question 1

OSI

Answer 1

• open systems interconnection.
• standardize networking between devices from different companies
• seven layers
• closest implementation is TCP/IP

Question 2

OSI seven layers

Answer 2

• application
• presentation
• session

Question 3

application layer

Answer 3

network protocols like HTTP, FTP, NFS. provides user interface. consumes and creates data

Question 4

presentation layer

Answer 4

presentation of the data., concerned with data format like video, image, text etc.

Question 5

session layer

Answer 5

maintain data about the communication channel between hosts. also hosts authentication

Question 6

transport layer

Answer 6

slice data into segments and reassemble in order

Question 7

network layer

Answer 7

responsible for routing data packets

Question 8

data packet

Answer 8

segment+routing info. like a letter

Question 9

data link layer

Answer 9

transmit data on physical medium. wrap each packet in data frame along with local routing data

Question 10

physical layer

Answer 10

actual cabling. enables data-link frames to be transmitted

Question 11

DCE

Answer 11

data communications equipment. another name for network device

Question 12

hub vs switch

Answer 12

switch is only repeats to certain ports, hub repeats to all ports. can be problem w/ > 50 users