OSI Model

Question 1

PDU (Protocol Data Unit) in the application layer

Answer 1

Data

Question 2

PDU (Protocol Data Unit) in the Transport Layer

Answer 2

Segment

Question 3

PDU (Protocol Data Unit) in the Internet Layer

Answer 3

Packets

Question 4

PDU (Protocol Data Unit) in the Network Access Layer

Answer 4

Frames

Question 5

Layer 2 of the OSI Model?

Answer 5

Data-Link

Question 6

Layer 4 of the OSI Model?

Answer 6

Transport

Question 7

Layer 5 of the OSI Model?

Answer 7

Session

Question 8

Layer 6 of the OSI model?

Answer 8

Presentation

Question 9

Layer 7 of the OSI Model

Answer 9

Application

Question 10

What three layers of the OSI Model are combined to create the Application Layer in the TCP/IP Stack?

Answer 10

Application, Presentation, and Session

Question 11

What two layers are combined in the OSI model to form the Network Access Layer in the TCP/IP Stack?

Answer 11

Data Link and Physical Layers

Question 12

What is the Network Layer in the OSI Model referred to in the TCP/IP stack?

Answer 12

Internet Layer

Question 13

What OSI layer establishes availability of intended communication partners? What are its PDUs called?

Answer 13

Layer 7 - The application Layer - Data

Question 14

What OSI layer manages data exchange b/t layers & offers reporting of upper layer problems?

Answer 14

Layer 5 - Session

Question 15

What layer of the OSI model determines if UDP or TCP is used?

Answer 15

Layer 4 - transport

Question 16

What is the mode when the switch prompt is switch>

Answer 16

user exec mode

Question 17

What is the mode of the switch after you enter enable (switch#)

Answer 17

privelege exec mode

Question 18

What is the mode on the switch after entering config t? switch(config)#

Answer 18

Global configuration

Question 19

Where is the IOS image stored?

Answer 19

flash

Question 20

Where is the startup config stored?

Answer 20

NVRAM

Question 21

What layer of the OSI model is responsible for flow control and error recovery? What are its PDUs called?

Answer 21

Transport Layer / Segments

Question 22

What allows a single sender to send multiple streams of traffic to varying hosts over a single circuit? What layer?

Answer 22

Session Multiplexing - transport layer

Question 23

If a sender sends a packet with a destination of port 80 and a source of 1500, what will the packet be on its return?

Answer 23

Source of 1500 and destination of 80

Question 24

Port number and TCP/UDP for FTP?

Answer 24

21 - TCP

Question 25

Port number and TCP/UDP for SSH?

Answer 25

22 - TCP

Question 26

Port number and TCP/UDP for Telnet?

Answer 26

23 - TCP

Question 27

Port number and TCP/UDP for TFTP?

Answer 27

69 - UDP

Question 28

Port number and TCP/UDP for SNMP?

Answer 28

161 - UDP

Question 29

Port number and TCP/UDP for DNS?

Answer 29

53 - both TCP and UDP