Chp 2

Question 1

OSI

Answer 1

Open systems interconnection

Question 2

Binding

Answer 2

Different protocols will be place to meet different layers needs

Question 3

Advantage of the OSI

Answer 3

Hierarchical
Divides network communications
Multiple vendor development
Standardization
Prevents changes to one layer

Question 4

OSI model

Answer 4

Application #7
Presentation #6
Session #5
Transport #4
Network #3
Data link #2
Physical #1

Question 5

Layer Functions
Application
Presentation
Session

Answer 5

Application-file print database applications services
Presentation-data encryption compression translation service
Session-dialog control

Question 6

Layer Functions
Transport
Network

Answer 6

Transport-end to end connection
Network-Routing

Question 7

Layer functions
Data link
Physical

Answer 7

Data link-framing
Physical-physical topology

Question 8

OSI top 3 layers

Answer 8

Application-provides a user interface
Presentation-presents data handles processing such as encryption
Session keeps different applications’ data separate

Question 9

Lower layers

Answer 9

Transport reliable or unreliable delivery
Network logical addressing path determination
Data link combines packets into bytes and bytes to frames
Uses MAC address
Error detection not correction
Physical moves bits between devices
Specific voltage wire speed pin out cables

Question 10

Presentation layer

Answer 10

Presents data to application layer
Responsable for data translation and code formatting
Compression decompression encryption and decryption

Question 11

Session Layer

Answer 11

Setting up managing and then tearing down sessions between layer entities
Dialog control
Simplex half duplex and full duplex

Question 12

Transport Layer

Answer 12

Segments and reassembles data into data stream
Handle data from upper layers
End to end data transport and Standish logical connection
Provides multiplexing virtual connection tearing down virtual circuits
Hides details of any network dependent information from higher layers to facilitate data transfer

Question 13

Connection-Oriented Communication

Answer 13

Host starts to send segments down
Creating a virtual circuit
Named connection oriented
Handshake amount of information send
TCP sends back a acknowledgment

Question 14

Connection Oriented communication
Diagram

Answer 14

Question 15

Three way handshake

Answer 15

1-connection agreement
2-synchronized
3-acknowledgment data transfer can begin
SYN,SYN/ACK,ACK

Question 16

Flow control

Answer 16

1 segments delivered acknowledge
2-any segments not ack retransmit
3-segments are sequenced back in proper order
4- managed date flow to avoid congestion overloading or data loss

Question 17

Buffer

Answer 17

Stores data grams in a memory but it can only hold a small burst of data