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OSI and TCP/IP Layers

Total questions: 48

Worksheet time: 24mins

Name
Class
Date
1.
What is layer 5 in the OSI model?
a)
Network
b)
Session
c)
Transport
d)
Application
e)
Presentation
2.
What is layer 1 in the OSI model?
a)
Transport
b)
Network
c)
Session
d)
Physical
e)
Data Link
3.
What is layer 4 in the OSI model
a)
Network
b)
Session
c)
Transport
d)
Data Link
e)
Presentation
4.
What is layer 3 in the OSI model?
a)
Network
b)
Session
c)
Transport
d)
Data Link
e)
Presentation
5.
What is layer 2 in the OSI model
a)
Transport
b)
Network
c)
Session
d)
Physical
e)
Data Link
6.
What is layer 7 in the OSI model?
a)
Network
b)
Session
c)
Transport
d)
Application
e)
Presentation
7.
What is layer 6 in the OSI model?
a)
Network
b)
Session
c)
Transport
d)
Application
e)
Presentation
8.
Encryption takes place at what layer?
a)
Application
b)
Session
c)
Data Link
d)
Presentation
e)
Transport
9.
IP is implemented at which OSI model layer?
a)
Transport
b)
Data Link
c)
Logical Link Control
d)
Session
e)
Network
10.
Which layer handles the formatting of application data so that it will be readable by the destination system?
a)
Application
b)
Session
c)
Data Link
d)
Presentation
e)
Transport
11.
Packets are found at which layer?
a)

Network/Internet

b)
Transport
c)
Session
d)
Data Link
e)
Physical
12.
Routers operate at which layer of the OSI model?
a)
Physical
b)
Network
c)
Session
d)
Transport
e)
Data Link
13.
Bits are packaged into frames at which layer of the OSI model?
a)
Data Link
b)
Physical
c)
Application
d)
Transport
e)
Presentation
14.
Which layer in the OSI model is divided into sublayers Logical Link Control and Media Access Control?
a)
Data Link
b)
Physical
c)
Network
d)
Transport
e)
Presentation
15.
What is the PDU for layer 4 in the OSI model?
a)
Packet
b)
Frame
c)
Bits
d)
Data
e)
Segment
16.
What is the PDU for layer 3 in the OSI model?
a)
Packet
b)
Frame
c)
Bits
d)
Data
e)
Segment
17.
What is the PDU for layer 2 in the OSI model?
a)
Packet
b)
Frame
c)
Bits
d)
Data
e)
Segment
18.
What is the PDU for layer 1 in the OSI model?
a)
Packet
b)
Frame
c)
Bits
d)
Data
e)
Segment
19.

Which 2 layers in the OSI model correspond to only one layer each in the TCP/IP model?

a)

Transport

b)

Network

c)

Session

d)

Physical

e)

Data Link

20.

Routers operate at which layer of the OSI model?

a)

physical

b)

transport

c)

network

d)

MAC sublayer of the data link layer

e)

session

21.

Which of the following are benefits of using a layered network model?


A . it specifies how changes to one layer must be propagated through the other layers

B . it facilitates troubleshooting

C . it focuses on details rather than general functions of networking

D . it breaks the complex process of networking into more manageable chunks

E . it allows layers developed by different vendors to interoperate.

a)

A and B only

b)

B, D, and E

c)

A and C only

d)

none of the above

e)

all of the above

22.

The layers of the OSI model, from the top down, are:

a)

application, presentation, session, transport, network, data link, physical

b)

session, presentation, data transport, MAC, network, physical

c)

physical, data link, network, transport, session, presentation, application

d)

presentation, application, session, network, transport, data link, physical

e)

application, encryption, network, transport, logical link control, physical

23.

Which of the following operate at the presentation layer?

A . MIDI

B . FTP

C . SMTP

D . TFTP

E . JPEG

a)

A and B

b)

A, C, and E

c)

C and E

d)

A and E

e)

none of the above

24.

Which of the following are transport layer protocols?

a)

TCP and UDP

b)

IP

c)

FTAM

d)

IP and TFTP

e)

TFTP

25.

Which of the following are considered to be the upper layer protocols?

a)

presentation and session

b)

application and presentation

c)

application, presentation, and session

d)

application, presentation, session, and transport

e)

application

26.

Flow control takes place at which layer?

a)

physical

b)

transport

c)

network

d)

MAC sublayer of the data link layer

e)

session

27.

Encryption takes place at which layer?

a)

application

b)

presentation

c)

session

d)

transport

e)

data link

28.

True or False: The network layer uses physical addresses to route data to destination hosts.

a)

True

b)

False

29.

Error detection and recovery takes place at which layer?

a)

transport

b)

presentation

c)

data link

d)

application

e)

network

30.

Which layer establishes, maintains, and terminates communications between applications located on different devices?

a)

application

b)

presentation

c)

session

d)

network

e)

data link

31.

IP is implemented at which OSI model layer?

a)

transport

b)

session

c)

data link

d)

network

e)

logical link control

32.

Which layer handles the formatting of application data so that it will be readable by the destination system?

a)

application

b)

presentation

c)

session

d)

transport

e)

data link

33.

Which of the following are presentation layer standards?

(choose the best answer)

A. MIDI

B. TIFF

C. JPEG

D. MPEG

E. GIF

a)

C and D

b)

B, C, and E

c)

B, C, D, and E

d)

A only

e)

all of the above

34.

Which layer translates between physical (MAC) and logical addresses?

a)

network

b)

data link

c)

transport

d)

physical

e)

session

35.

Repeaters and hubs operate at which layer?

a)

network

b)

data link

c)

transport

d)

physical

e)

session

36.

What are the sublayers of the data link layer?

a)

MAC and IPX

b)

hardware and frame

c)

MAC and LLC

d)

WAN and LAN

e)

TFTP and telnet

37.

Which layer is responsible for packet sequencing, acknowledgments, and requests for retransmission?

a)

The MAC sublayer of the data link layer

b)

transport

c)

physical

d)

application

e)

network

38.

In the current TCP/IP model, the Application, Presentation, & Session layers from the OSI model are combined into which layer?

a)

Data Link

b)

Physical

c)

Transport

d)

Application

e)

Network

39.

What protocol(s) is used at the Network layer?

a)

Transmission Control Protocol (TCP)

b)

Both options are protocols used at the Network layer

c)

Internet Protocol (IP)

40.

Why were the Data Link & Physical layers divided into two separate layers in the current TCP/IP model?

a)

Because the number of protocols grew too large for the link layer to handle it by itself

b)

Because networks use different types of transmission media (ethernet wire, fiber optic cable, and radio signals) to transmit bits

c)

Because the original TCP/IP model was too complicated for many typical uses

41.

True or False: the application layer defines how applications use the network, not how the applications actually work

a)

True

b)

False

42.

Transport layer protocols

a)

convert the data into bits to be transmitted

b)

use port numbers to track sessions

c)

address the traffic for its destination

43.

What information is found in a TCP header?

a)

Destination port

b)

Source port

c)

Both options are found in a TCP header

44.

What is the FIRST thing the destination does at the network layer with a packet it receives?

a)

Pass the packet to the transport layer

b)

Remove the IP header

c)

Reassemble the data once it receives all the packets

45.

What information is found in the frame header?

a)

Both are found in a frame header

b)

Destination MAC address of the next device in the path to the ultimate destination

c)

Source MAC address

46.

What is done with the data at the physical layer?

a)

The physical layer header is added to the frame to prepare it for transmission

b)

Both occur at the physical layer

c)

The data is converted into its intended transmission media (electrical, light, radio wave) and sent down its transmission path

47.

Data Link and Physical are combined into what layer in TCP/IP?

a)

Network Layer

b)

Sub Network Layer

c)

Frame Layer

d)

Data Processing Layer

48.

Is the term "Network layer" interchangeable with "Internet layer"

a)

True

b)

False

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