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CITX 1110 > Network Concepts > Flashcards

Network Concepts Flashcards

1
Q

PAN

A

A network that connects devices within the range of an individual person. All of these devices are dedicated to a single host.

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2
Q

Peer-to-Peer

A

A network that has no hierarchy among the computers, nor are there any dedicated servers. Each client has equivalent capabilities and responsibilities.

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3
Q

LAN

A

A network that encompasses a small geographical area, typically owned by an individual or wholly managed by an IT department.

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4
Q

MAN

A

A network that spans across a large campus or city and consists of various buildings interconnected through wireless or fiber optic backbones.

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5
Q

WLAN

A

A network that uses radio waves to transmit data between wireless devices. This network can operate in infrastructure or ad hoc mode.

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6
Q

WAN

A

A network that connects multiple networks that are in geographically separate locations and is owned by a service provider.

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7
Q

Client-Server

A

A network where hosts request information or services from a server. The server provides the requested information or service to the hosts.

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8
Q

Ad hod

A

WLAN is created when it is needed. Usually temporary.

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9
Q

Data Transmission

A

Data transmitted over the network can flow using one of the three modes: simplex, half-duplex, or full-duplex

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10
Q

Simplex (data transmission)

A

Single, one-way transmission. (e.g. signal sent from TV station to your home tv)

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11
Q

Half-duplex (data transmission)

A

Data flows in one direction at a time. Alternating transmission in two directions, but not in both directions simultaneously. (e.g two-way radios “I can send and receive, but not at the same time)

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12
Q

Full-duplex (data transmission)

A

Data flows in both directions at the same time. (e.g. telephone conversation)

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13
Q

LAN

A

Local area network

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14
Q

WLANS

A

Wireless local area network

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15
Q

PANs

A

Personal area network

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16
Q

MANs

A

Metropolitan area network. Network that spans across a large campus or a city

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17
Q

Incorporate standard protocols

A
  • Internet Protocol version 4 (IPv4)
  • 802.3 (Ethernet)
  • 802.11 (Wireless LAN)
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18
Q

OSI Model

A

Application, presentation, session, transport, network, data link, physical.

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19
Q

Application (OSI Model)

A

Layer 7, responsible for network services to applications.

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20
Q

Presentation (OSI Model)

A

Layer 6, transforms data formats to provide a standard interface for the application layer

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21
Q

Session (OSI Model)

A

Layer 5, establishes, manages, and terminates the connections between the local and remote application

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22
Q

Transport (OSI Model)

A

Layer 4, provides reliable transport and flow control across a network

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23
Q

Network (OSI Model)

A

Layer 3, responsible for logical addressing and the domain of routing

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24
Q

Data Link (OSI Model)

A

Layer 2, provides physical addressing and media access procedures

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25
Q

Physical (OSI Model)

A

Layer 1, defines all the electrical and physical specifications for devices

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26
Q

TCP/IP Model

A

Application, transport, internet, network access

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27
Q

Application (TCP/IP Model)

A

Where high-level protocols such as SMTP and FTP operate.

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28
Q

SMTP

A

Simple mail transfer protocol

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29
Q

FTP

A

File transfer protocol

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30
Q

Transport (TCP/IP Model)

A

Specifies which application requested or is receiving data through specific ports

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31
Q

Internet (TCP/IP Model)

A

Where IP addressing and routing take place

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32
Q

Network Access (TCP/IP Model)

A

Where MAC addressing and physical components of the network exist

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33
Q

TCP

A

Transmission control protocol. Responsible for reliable delivery

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34
Q

IP

A

Internet protocol. Responsible for adding source and destination addressing to the data

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35
Q

Protocol + topology =

A

networking

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36
Q

Bus

A

network in which nodes are directly connected to a common linear (or branched) half-duplex link

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37
Q

What are the 3 types of topology?

A

Bus, star, token ring

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38
Q

RFC

A

Request for comments. E.g. RFC 792 - internet control message protocol

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39
Q

10Base-T

A

Category 3, transfers data at a rate of 10 Mb/s

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40
Q

100Base-TX

A

Category 5, At 100 Mb/s, transfer rates of 100BASE-tX are ten times that of 10BASE-T

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41
Q

1000BASE-T

A

Category 5e, 6. The 1000BASE-T architecture supports data transfer rates of 1 Gb/s

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42
Q

10GBASE-T

A

Category 6a, 7. The 10GBASE-T architecture supports data transfer rates of 10 Gb/s

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43
Q

IEEE 802.3 standard

A

Several physical implementations that support Ethernet

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44
Q

1000BASE-T

A

Most commonly implemented Ethernet architecture today

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45
Q

CSMA/CA

A

IEEE 802.11. Standard that specifies connectivity for wireless networks.

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46
Q

802.11a, 802.11b, and 802.11g

A

standards should be considered legacy

47
Q

Open system and Shared key authentication

A

Two types of authentication were introduced with original 802.11 standard

48
Q

Wired equivalent privacy (WEP), Wi-Fi protected access (WPA), IEEE 802.11i/WPA2

A

Three shared key authentication techniques for WLANS

49
Q

HUBs

A

Receive data on one port and send out to all other ports

50
Q

Bridges

A

Introduced to divide LANs into segments.

51
Q

Switches

A

Filters and segments network traffic by sending data only to the device to which it is sent

52
Q

Wireless Access Points

A

Provide network access to wireless devices. E.g. Laptops and tablets

53
Q

Routers

A

Uses IP addresses to forward traffic to other networks

54
Q

Firewall

A

Resides between two or more networks and protects data and equipment on a network from unauthorized access

55
Q

Repeater

A

Regenerates weak signals to effectively extend the distance a signal can travel

56
Q

Modem

A

Converts a computer’s digital data into a format that can be transmitted on the ISP’s network

57
Q

PoE Switch

A

Transfer small amounts of DC current over Ethernet cable, along with data, to power special devices

58
Q

Patch Panel

A

A place to collect incoming cable runs from the various networking devices throughout a facility

59
Q

Network cables (examples)

A

E.g. twisted-pair cable, coaxial cable, fiber-optic cable

60
Q

Coaxial cables

A

usually constructed either copper or aluminum. E.g used by both cable television companies and satellites

61
Q

Twister-pair cables

A

Type of copper cabling used for telephone communications and most Ethernet

62
Q

Fiber-Optic cables

A

Composed of two kinds of glass (core and cladding)

63
Q

Types of fiber media

A

Single-mode fiber (SMF), and multimode fiber (MMF)

64
Q

What are the 2 types of addresses?

A

Media access control (MAC) and IP address

65
Q

MAC

A

hard coded onto NIC (network interface card) by manufacturer. 48 bits. Can represent on of the three hexadecimal formats.

66
Q

The two types of IP addresses are?

A

IPv4 or IPv6

67
Q

IPv4

A

32 bits in dotted decimal notation. E.g. 192.168.200.8

68
Q

IPv6

A

128 bits in hexadecimal format. E.g. 2001:0DB8:CAFE:0200:0000:0000:0000:0008. 128 bits compressed format. E.g. 2001:DB8:CAFE:200:8

69
Q

Class A (IPv4)

A

First Octet - 0-127.
Subnet mask - 255.0.0.0
Number of hosts p/ network - 16,777,217

70
Q

Class B (IPv4)

A

First Octet - 128-191
Subnet mask - 255.255.0.0
# of hosts p/network - 65,534

71
Q

Class C (IPv4)

A

First Octet - 192-223
Subnet mask - 255.255.255.0
# of hosts p/network - 254

72
Q

Subnet mask 255.0.0.0, prefix?

A

/8

73
Q

Subnet mask 255.255.0.0, prefix?

A

/16

74
Q

Subnet mask 255.255.255.0, prefix?

A

/24

75
Q

Does not require acknowledgements?

A

UDP

76
Q

Delivers data as it arrives

A

UDP

77
Q

Reliable

A

TCP

78
Q

Fast

A

UDP

79
Q

Resends lost data

A

TCP

80
Q

Delivers data in sequenced order

A

TCP

81
Q

Low overhead

A

UDP

82
Q

Does not resend lost data

A

UDP

83
Q

Acknowledges data

A

TCP

84
Q

UDP

A

User datagram protocol

85
Q

80 protocol

A

Hypertext Transfer Protocol (HTTP)

86
Q

53 protocol

A

Domain Name Service (DNS)

87
Q

21 protocol

A

File Transfer Protocol (FTP)

88
Q

548 or 427 protocol

A

Apple filing protocol (AFP)

89
Q

110 protocol

A

Post office protocol V3 (POP3)

90
Q

22 protocol

A

Secure shell (SSH)

91
Q

25 protocol

A

Simple mail transfer protocol (SMTP)

92
Q

143 protocol

A

Internet message access protocol (IMAP)

93
Q

443 protocol

A

Hypertext transfer protocol secure (HTTPS)

94
Q

445 protocol

A

Server message block (SMB)

95
Q

How many devices can a bluetooth device connect to simultaneously?

A

7

96
Q

Which layer of the OSI model is responsible for logical addressing and routing?

A

Network

97
Q

When would a printer be considered a network host?

A

when it is connected to a switch

98
Q

Which device provides wireless connectivity to users as its primary function?

A

Access point

99
Q

Which technology is most often used to connect devices to a PAN?

A

Bluebooth

100
Q

What is a characteristic of a WAN?

A

It connects multiple networks that are geographically separated.

101
Q

What is the correct order of the layers of the TCP/IP model from the top layer to the bottom?

A

application, transport, internet, network access

102
Q

What TCP/IP model layer is responsible for MAC addressing?

A

Network access

103
Q

What PDU is associated with the network layer of the OSI model?

A

Packet

104
Q

What is identified by the 100 in the 100BASE-TX standard?

A

the maximum bandwidth in Mb/s

105
Q

Which IEEE standard operates at wireless frequencies in both the 5 GHz and 2.4 GHz ranges?

A

802.11n

106
Q

Which network device makes forwarding decisions based on the destination MAC address that is contained in the fram?

A

switch

107
Q

A _ uses IP addresses to forward traffic from one network to other networks.

A

Router

108
Q

A network specialist has been hired to install a network in a company that assembles airplane engines. Because of the nature of the business, the area is highly affected by electromagnetic interference. Which type of network media should be recommended so that the data communication will not be affected by EMI?

A

Fiber optic

109
Q

Which term describes a type of coaxial cable?

A

RG-6

110
Q

Which pairs of wires change termination order between the 568A and 568B standards?

A

Green and orange

111
Q

Which two types of signal interference are reduced more by STP than by UTP?

A

RFI and EMI

112
Q

How many host addresses are available on a network with a subnet mask of 255.255.0.0?

A

65,534

113
Q

A technician is troubleshooting a problem where the user claims access to the Internet is not working, but there was access to the Internet the day before. Upon investigation, the technician determines that the user cannot access the network printer in the office either. The network printer is on the same network as the computer. The computer has 169.254.100.88 assigned as an IP address. What is the most likely problem?

A

The computer cannot communicate with a DHCP server.

114
Q

What is a characteristic of the UDP protocol?

A

Low overhead

CITX 1110 (5 decks)

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