Practice Quiz

bonkburpsNetworking and Communications

Oct 23, 2013 (3 years and 10 months ago)

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Practice Quiz


The purpose of this practice quiz is to give you a ‘preview’ of the types of questions that
will be on the actual quiz and the depth of knowledge that I will be expecting you to have.

The practice quiz will NOT test all of the concepts that
will be on the actual quiz. All of
the concepts that may be included on the quiz ARE listed on the review sheet.


A separate copy of the quiz with answers included is also posted. I would recommend
that you complete the practice quiz yourself before lookin
g at the answers if you want to
get a good sense of how much you know.

Remember that you will not be able to use
notes or books during the actual quiz.


There are a total of 80 points on this practice quiz.

52 points, or 65%, are multiple choice

7 points,

or 9%, are matching problems

21 points, or 26%, are short answer problems


Multiple choice questions
-

2 points each.


1.

Which of the following are reasons organizations might want
to install
computer
networks?


I

Sharing hardware resources (printers, scanne
rs)

II

Communicating with each other (email,e.g.)

III

Entertainment (games,music)

(Pick the best lettered answer)

A

I


B

II


C

III

D

I&II

E

II&III


2.

An insurance company branch office has 60 employees including 25 claims
representatives and 5 managers. The
claims representatives and managers have
desktop PCs. What so
rt of file sharing network would be

most appropriate for an
office of this size
? (Pick the best lettered answer)

A

Peer
-
peer network

B

Server
-
based (dedicated server)

C

TCP/IP

D

Non
-
dedicated ser
ver

E

Logical ring



3.

A group of 3 roommates each have their own PCs at home and want to connect to a
broadband Internet connection. What sort of network protocol should they make sure
they run on their network? (Pick the best lettered answer)

A

Peer
-
peer n
etwork

B

Server
-
based (dedicated server)

C

TCP/IP

D

Non
-
dedicated server

E

Logical ring


4.

A cor
poration with 2000 employees, 1200 desktop computers

and 20 office locations
would be likely to
need : (Pick the best lettered answer)

A

No network administrator
s

B

One network administrator

C

More than one network administrator

D

200 network administrators


5.

Printers and print servers are most often connected to each other using (Pick the best
lettered answer)

A

Wireless connections

B

Network cabling

C

Parallel or

USB cabling

D

Packet switching

E

String


6.

A physical topology tel
ls us how
(Pick the best lettered answer)

A

a network transmit signals between nodes

B

network cables are arranged

C

network nodes find other network nodes

D

IP addresses are assigned

E

to kn
ow which node is on top


7.

A physical star topology will always (Pick the best lettered answer)

A

transmit signals to all nodes simultaneously

B

Use CSMA/CD

C

Connect each node to a central hub

D

Be an Ethernet

E

Be light years away from Earth


8.

Which network

topology transmits signals from one node to the next, regenerating the
packet at each node?

(Pick the best lettered answer)

A

logical bus

B

physical bus

C

logical ring

D

school bus

E

Satellite


9.

Ethernet commonly uses the following media

I

Coaxial cable

II

twisted pair cable

III

fiber optic cable

(Pick the best lettered answer)

A

I

B

II

C

III

D

I&II

E

II&III

F

I,II&III



10.

What network protocol uses CSMA/CD? (Pick the best lettered answer)

A

Token Ring

B

Transport layer

C

Ethernet

D

Acronym

E

ARP


11.

What happe
ns when there is a collision on a network using CSMA/CD? (Pick the
best lettered answer)

A

The airbags go off and the police are called.

B

The network administrator has to reboot the network.

C

Both nodes wait for a random period of time then try to trans
mit again.

D

The token is passed to the next node.

E

The bus is terminated.


12.

On a network using CSMA/CD, what does a node do upon receiving a packet that is
not addressed to it? (Pick the best lettered answer)

A

Sends the packet back to the sending node

B

Passes the packet on to the next node

C

Discards the packet

D

Sends the packet to the router

E

Strips off the header


13.

The OSI model is called a reference model because (Pick the best lettered answer)

A

All other network protocols use OSI protocols

B

It
is an idealized model which other network protocols are compared to

C

it has seven layers

D

it is an international standard issued by the ISO


14.

Ethernet frames always (Pick the best lettered answer)

A

are bigger than the picture

B

include source and destin
ation addresses

C

are big enough to include a full email message in each frame

D

are addressed by the OUI


15.

In the OSI model, when 2 network nodes communicate (Pick the best lettered answer)

A

Each layer communicates directly with the same layer on the othe
r computer. The
message does not travel through any other layers
.

B

Ea
ch layer communicates only to the Application layer

C

Each layer communicates with the same layer on the other computer by passing data
to the layer below it, eventually onto the network

medium, then data passes back up
through layers until it gets to the same layer on the other computer.

D

They both have to be on an Ethernet network.







16.

Which of the following is NOT the name of an OSI model layer? (Pick the best
lettered answer)

A

Net
work

B

Session

C

Logic

D

Transport

E

Physical


17.

Which of the following is NOT a function described by the OSI physical layer? (Pick
the best lettered answer)

A

signal encoding

B

logical addressing

C

physical connectors

D

physical topology


18.

As data moves thr
ough the OSI model on the sending node, the length of a packet
(Pick the best lettered answer)

A

becomes shorter as headers are stripped off

B

becomes longer as headers are added

C

stays the same as headers are processed

D

is proportional to the distance
to the receiving node

E

is proportional to the speed of the physical layer


19.

The process of data encaps
ulation is most like

what happens in which
of the
following physical systems? (Pick the best lettered answer)

A

Food distribution system

B

Electric distr
ibution system

C

Postal (Mail) system

D

Air transportation system


20.

Which of the following is a physical layer device? (Pick the best lettered answer)

A

Bridge

B

Switch

C

Toaster


D

Repeater

E

Router


21.

A _________ address defines the address of a network int
erface card (NIC) on a
network node uniquely. (Pick the best lettered answer to fill in the blank)

A

Street

B

Logical

C

IP

D

Organizationally Unique Identifier (OUI)

E

Media Access Control (MAC)






22.

The lowest layer of the OSI model that the TCP/IP pr
otocol suite refers to is the
_________ layer (Pick the best lettered answer to fill in the blank)

A

Filling

B

Physical

C

Session

D

Network

E

Presentation



23.

Which of the following could be a valid IP address? (Pick the best lettered answer)

A

00
-
80
-
C7
-
CA
-
A
F
-
26

B

300.944.
12
3.12
2

C

0
-
40
-
199
-
202
-
175
-
38

D

146.115.32.118

E

www.yahoo.com


24.

In classical (classful) IP addressing, which of the following are true?

I

Class C addresses can have the most nodes per network

II

There ar
e fewer Class B networks than Class A networks

III

The first octet of a class A address is between 1 and 126, expressed in dotted
decimal form

(Pick the best lettered answer)

A

I

B

II

C

III

D

I&II

E

II&III


25.

Which of the following is the binary representati
on of the decimal number 129?

(Pick
the best lettered answer)

A

00
00
0111

B

10001001

C

00100110

D

10000001

E

10100101


26.

When we read a 4 digit binary number from right to left, the values in each column
are multiplied by what to get the decimal equivalent?

(Pick the best lettered answer)

A


256
|

16
|

4
|
1

B

1000
|
100
|
10
|
1

C


8
|

4
|

2
|
1

D

4096
|
256
|
16
|
1








27.

MATCHING QUESTION (7 points) Please write in the number of the matching it
em
in the blank, next to the matching OSI layer names
.

Notes:

I WILL NOT PAY

ATTENTION TO DRAWN LINES!

There are more lettered layer names than actual OSI layers. 2 of the
lettered names

are NOT OSI layer names.


Write number beside
appropriate layer name:



A

Session


1

Layer 1

B

Physical


2

Layer 2

C

Transport


3

Layer 3

D

Application


4

Layer 4

E

Address


5

Layer 5

F

Data Link


6

Layer 6

G

Presentation


7

Layer 7

H

Network




I

Ethernet





Short Answer questions (3 points each)


28.


Please draw diagrams of 3 physical topologies below







29.

What transmission method does
Ethernet use, and why does it sometimes cause
problems for video or voice transmission over Ethernet networks?







30.

Compare 2 types of network media on the basis of their type (Wired or wireless),
composition (materials) and information carrying capacity
(max transmission rate)







31.

In classical (classful) IP addresses, how many octets are part of the network prefix in
Class A, Class B and Class C networks?





32.

Name at least one physical layer device, data link layer device and network layer
device, notin
g which OSI layer the device operates in.






33.

Give the full name of the following protocols along with the OSI layer they operate
in: TCP,IP,UDP