Telecommunications and Network Security

Question 1

Data Network Types are

Answer 1

LAN ( local area network ) and WAN ( wide area network )

Question 2

( ! ) A data network that operates over a small geographical area such as a building floor etc that can be wired or wireless ( or both ) is a

Answer 2

LAN ( Local Area Network )

Question 3

A LAN operates on the following layers of OSI

Answer 3

PHYSICAL and DATA LINK

Question 4

( ! ) A data network that operates over a relatively large geographic area and may connect LANs and WANs via telecommunications is a

Answer 4

WAN ( Wide Area Network )

Question 5

A WAN on the following layers of OSI

Answer 5

PHYSICAL, DATALINK and NETWORK

Question 6

Internet, Intranet and Extranet are examples of a

Answer 6

WAN

Question 7

What is OSI Reference model established by the ISO ( International Standards Organization )

Answer 7

OPEN SYSTEMS INTERCONNECTION defines standard protocols for communication and interoperability by a layered approach. Facilitates operation between network devices.

Question 8

The OSI model consists of ( ? ) Layers

Answer 8

( 7 ) SEVEN

Question 9

LAYER 1

Answer 9

PHYSICAL

Question 10

LAYER 2

Answer 10

DATA LINK

Question 11

LAYER 3

Answer 11

NETWORK

Question 12

LAYER 4

Answer 12

TRANSPORT

Question 13

LAYER 5

Answer 13

SESSION

Question 14

LAYER 6

Answer 14

PRESENTATION

Question 15

LAYER 7

Answer 15

APPLICATION

Question 16

LAYERS communicate with the layers

Answer 16

ABOVE AND BELOW ( ADJACENT )

Question 17

LAYERS communicate via

Answer 17

DATA ENCAPSULATION

Question 18

PHYSICAL is LAYER

Answer 18

ONE ( 1 )

Question 19

DATA LINK is LAYER

Answer 19

TWO ( 2 )

Question 20

NETWORK is LAYER

Answer 20

THREE ( 3 )

Question 21

TRANSPORT is LAYER

Answer 21

FOUR ( 4 )

Question 22

SESSION is LAYER

Answer 22

FIVE ( 5 )

Question 23

PRESENTATION is LAYER

Answer 23

SIX ( 6 )

Question 24

APPLICATION is LAYER

Answer 24

SEVEN ( 7 )

Question 25

Physical Layer is responsible for

Answer 25

sending and receiving bits across the network cabling from one device to another.

Question 26

PHYSICAL specifies

Answer 26

ELECTRICAL, MECHANICAL, and FUNCTIONAL requirements of the network.

Question 27

Physical Layer consists of

Answer 27

NETWORK TOPOLOGY, CABLING AND CONNECTORS, INTERFACES, and process for converting bits to SIGNALS that can be transmitted across a physical medium.

Question 28

Network Topologies types

Answer 28

STAR, MESH, RING, BUS

Question 29

In a STAR topology each individual note on the network is directly connected to

Answer 29

a SWITCH, HUB or Concentrator. It is the most common basic topology it is easy to install and maintain.

Question 30

ALL TRAFFIC pass through a HUB or SWITCH can become a

Answer 30

BOTTLENECK or Single Point of Failure.

Question 31

In a MESH topology

Answer 31

all systems are interconnected providing multiple paths to all resources.

Question 32

In a RING topology

Answer 32

all devices are connected in a continuous RING all communications travel in a single direction.

Question 33

In a BUS ( linear ) topology

Answer 33

all devices are connected to a single cable that is terminated at both ends. Commonly used for small networks.

Question 34

CABLE AND CONNECTOR types

Answer 34

COAXIAL, TWINAXIAL, TWISTED PAIR, FIBER OPTIC,

Question 35

ANALOG Signaling conveys information via

Answer 35

waves by variation of amplitude, frequency and phase

Question 36

DIGITAL Signaling conveys information via

Answer 36

pulses through presence of on / off electrical signals.

Question 37

( ! ) A US military TERM that refers to the study of electromagnetic emissions from computers and computer related equipment

Answer 37

TEMPEST

Question 38

( ! ) Network Topology, cable connector types, and interfaces are defined at the ( X ) layer of the OSI model

Answer 38

PHYSICAL

Question 39

Networking equipment that operates at the PHYSICAL layer consist of

Answer 39

NICs, Network Media ( cabling and connectors) , Repeaters and HUBs.

Question 40

Repeaters are a non intelligent device which serves to

Answer 40

amplify signals against loss to allow for extension of cable segments.

Question 41

A HUB ( concentrator ) is used to connect LAN devices together two types are

Answer 41

PASSIVE / ACTIVE

Question 42

( ! ) DATA LINK LAYER is responsible for ensuring

Answer 42

messages are delivered to a proper device on the physical networking link, it defines networking protocol.

Question 43

DATA LINK LAYER consists of two sub layers of control

Answer 43

LOGICAL LINK and MEDIA ACCESS

Question 44

LAYER 2 Protocols are

Answer 44

ARP and RARP.

Question 45

ARP maps an IP address to a

Answer 45

MAC ADDRESS

Question 46

ARP is used to identify

Answer 46

a device's HW address when only the IP address is know.

Question 47

RARP maps an MAC address to a

Answer 47

IP ADDRESS

Question 48

RARP is used to identify

Answer 48

a device's IP ADDRESS when the MAC address is known.

Question 49

LAN DATA Transmissions are classified as

Answer 49

UNICAST, MULTICAST and BROADCAST