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CISSP > Telecommunications and Network Security > Flashcards

Telecommunications and Network Security Flashcards

1
Q

Data Network Types are

A

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

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2
Q

( ! ) 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

A

LAN ( Local Area Network )

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3
Q

A LAN operates on the following layers of OSI

A

PHYSICAL and DATA LINK

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4
Q

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

A

WAN ( Wide Area Network )

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5
Q

A WAN on the following layers of OSI

A

PHYSICAL, DATALINK and NETWORK

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6
Q

Internet, Intranet and Extranet are examples of a

A

WAN

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7
Q

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

A

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

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8
Q

The OSI model consists of ( ? ) Layers

A

( 7 ) SEVEN

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9
Q

LAYER 1

A

PHYSICAL

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10
Q

LAYER 2

A

DATA LINK

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11
Q

LAYER 3

A

NETWORK

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12
Q

LAYER 4

A

TRANSPORT

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13
Q

LAYER 5

A

SESSION

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14
Q

LAYER 6

A

PRESENTATION

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15
Q

LAYER 7

A

APPLICATION

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16
Q

LAYERS communicate with the layers

A

ABOVE AND BELOW ( ADJACENT )

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17
Q

LAYERS communicate via

A

DATA ENCAPSULATION

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18
Q

PHYSICAL is LAYER

A

ONE ( 1 )

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19
Q

DATA LINK is LAYER

A

TWO ( 2 )

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20
Q

NETWORK is LAYER

A

THREE ( 3 )

21
Q

TRANSPORT is LAYER

A

FOUR ( 4 )

22
Q

SESSION is LAYER

A

FIVE ( 5 )

23
Q

PRESENTATION is LAYER

A

SIX ( 6 )

24
Q

APPLICATION is LAYER

A

SEVEN ( 7 )

25
Q

Physical Layer is responsible for

A

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

26
Q

PHYSICAL specifies

A

ELECTRICAL, MECHANICAL, and FUNCTIONAL requirements of the network.

27
Q

Physical Layer consists of

A

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

28
Q

Network Topologies types

A

STAR, MESH, RING, BUS

29
Q

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

A

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

30
Q

ALL TRAFFIC pass through a HUB or SWITCH can become a

A

BOTTLENECK or Single Point of Failure.

31
Q

In a MESH topology

A

all systems are interconnected providing multiple paths to all resources.

32
Q

In a RING topology

A

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

33
Q

In a BUS ( linear ) topology

A

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

34
Q

CABLE AND CONNECTOR types

A

COAXIAL, TWINAXIAL, TWISTED PAIR, FIBER OPTIC,

35
Q

ANALOG Signaling conveys information via

A

waves by variation of amplitude, frequency and phase

36
Q

DIGITAL Signaling conveys information via

A

pulses through presence of on / off electrical signals.

37
Q

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

A

TEMPEST

38
Q

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

A

PHYSICAL

39
Q

Networking equipment that operates at the PHYSICAL layer consist of

A

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

40
Q

Repeaters are a non intelligent device which serves to

A

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

41
Q

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

A

PASSIVE / ACTIVE

42
Q

( ! ) DATA LINK LAYER is responsible for ensuring

A

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

43
Q

DATA LINK LAYER consists of two sub layers of control

A

LOGICAL LINK and MEDIA ACCESS

44
Q

LAYER 2 Protocols are

A

ARP and RARP.

45
Q

ARP maps an IP address to a

A

MAC ADDRESS

46
Q

ARP is used to identify

A

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

47
Q

RARP maps an MAC address to a

A

IP ADDRESS

48
Q

RARP is used to identify

A

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

49
Q

LAN DATA Transmissions are classified as

A

UNICAST, MULTICAST and BROADCAST

CISSP (2 decks)

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