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OSI Layer

Total questions: 48

Worksheet time: 2hrs 36mins

Name
Class
Date
1.

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

2.

Bits are packaged into frames at which layer of the OSI model?

a)

data link

b)

transport

c)

physical

d)

presentation

e)

application

3.

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

4.

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

5.

Encryption takes place at which layer?

a)

application

b)

presentation

c)

session

d)

transport

e)

data link

6.

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

a)

True

b)

False

7.

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

a)

application

b)

presentation

c)

session

d)

network

e)

data link

8.

IP is implemented at which OSI model layer?

a)

transport

b)

session

c)

data link

d)

network

e)

logical link control

9.

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

10.

Packets are found at which layer?

a)

data link

b)

transport

c)

network

d)

session

e)

physical

11.

What does OSI stand for?

a)

International Standards Organization

b)

Open Systems Interconnect

c)

Operating Standard Information

d)

Operating System Interconnection

e)

Open Systems Interface

12.

Repeaters and hubs operate at which layer?

a)

network

b)

data link

c)

transport

d)

physical

e)

session

13.

Bit synchronization is handled at which layer?

a)

data link

b)

session

c)

transport

d)

presentation

e)

physical

14.

True or False: most logical addresses are preset in network interface cards at the factory

a)

True

b)

False

15.

Bridges operate at which layer of the OSI model?

a)

physical

b)

data link

c)

transport

d)

network

e)

session

16.

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

17.

Which OSI layer header contains the address of a destination host that is on another network?

a)

application

b)

transport

c)

network

d)

physical

e)

data link

18.

What layer are the RJ-45 connectors found?

a)

transport

b)

network

c)

physical

d)

data link

19.

What layer are NICs found?

a)

Layer 1

b)

Layer 7

c)

Layer 4

d)

Layer 2

e)

Layer 5

20.

Which layer in the OSI model covers routing between networks?

a)

Physical

b)

Data Link

c)

Network

d)

Transport

21.

Which layer in the OSI model do MAC addresses and switches use?

a)

Physical

b)

Data Link

c)

Network

d)

Transport

22.

Which layer of the OSI model is used to create a connection so that a host can transfer files?

a)

Physical

b)

Session

c)

Application

d)

Presentation

23.

Which layer in the OSI model is responsible for logging on and off?

a)

Physical

b)

Session

c)

Application

d)

Presentation

24.

Which layer in the OSI model is used to encrypt data?

a)

Physical

b)

Session

c)

Application

d)

Presentation

25.

Which layer in the OSI model includes the cable and network adapters?

a)

Physical

b)

Session

c)

Application

d)

Presentation

26.

How many layers does the TCP/IP model have?

a)

3

b)

4

c)

6

d)

7

27.

Which layer in the OSI model is included in the TCP/IP model?

a)

Physical

b)

Data Link

c)

Transport

d)

Application

28.

Which protocol is used to translate IP addresses to MAC addresses?

a)

RARP

b)

ARP

c)

DNS

d)

WINS

29.

The OSI model is made up of _____ ordered layers

a)

five

b)

seven

c)

four

d)

six

30.

Layer 3 uses the services provided by ______

a)

layer 2

b)

layer 4

c)

layer 3

d)

layers 2 and 4

31.

Trailers are usually added only at layer ______

a)

2

b)

3

c)

4

d)

5

32.

______ are added to the data at layers 6, 5, 4, 3, and 2

a)

headers

b)

trailers

c)

trailers and headers

d)

none of the choices

33.

_______ layer ensures reliable transmission on a node to node link

a)

physical

b)

data-link

c)

network

d)

transport

34.

_______ layer ensures end-to-end reliable data transmission.

a)

physical

b)

data-link

c)

network

d)

transport

35.

______ layer is mostly hardware

a)

physical

b)

data-link

c)

network

d)

transport

36.

The upper OSI layers are almost always implemented in _______.

a)

hardware

b)

software

c)

hardware and software

d)

firmware

37.

Lower layers are a combination of _______

a)

hardware

b)

software

c)

software and hardware

d)

firmware

38.

The data-link layer divides the stream of bits received from the network layer into manageable data units called _______

a)

frames

b)

datagram

c)

packet

d)

bytes

39.

Network layer oversees end-to-end delivery of individual ______

a)

data

b)

frames

c)

packets

d)

bytes

40.

The _______ layer establishes, maintains, and synchronizes the interaction between communicating systems

a)

transport

b)

application

c)

presentation

d)

session

41.

The _______ layer is connected with the syntax and semantics of the information exchanged between two systems

a)

session

b)

transport

c)

presentation

d)

application

42.

The ______ layer decides the location of synchronization points

a)

transport

b)

session

c)

presentation

d)

application

43.

Decryption and encryption of data are the responsibility of the ____ layer

a)

physical

b)

data-link

c)

presentation

d)

session

44.

Dialog control is the function of the ______ layer

a)

transport

b)

session

c)

presentation

d)

application

45.

Mail services and directory services are available to network users through the ______ layer.

a)

data-link

b)

session

c)

transport

d)

application

46.

As the data packet moves from the lower to the upper layers, headers are ______

a)

added

b)

subtracted

c)

rearranged

d)

modiified

47.

Describe the headers and trailers and how do they get added and removed in internetworking.

a)

Headers and trailers are control data added at the beginning and the end of each data unit at each layer of the sender and removed at the corresponding layers of the receiver

b)

Headers and trailers are control data added at the beginning and the end of each data unit at each layer of the receiver and removed at the corresponding layers of the sender

c)

They provide source and destination addresses, synchronization points, information for error detection, etc.

d)

They are preview or coming attraction for the upcoming data.

48.

Match the following to one or more layers of the OSI model:

i. Route determination

ii. Flow control –

iii. Interface to transmission media

iv. Provides access for the end user

a)

i. data link and transport layer

ii. network layer

iii. physical layer

iv. application layer

b)

i. network layer

ii. data link and transport layer

iii. application layer

iv.physical layer

c)

i. application layer

ii. data link and transport layer

iii. physical layer

iv. network layer

d)

i. network layer

ii. data link and transport layer

iii. physical layer

iv. application layer