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CITX 1110 > Network Concepts > Flashcards

Network Concepts Flashcards

(114 cards)

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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
Physical (OSI Model)
Layer 1, defines all the electrical and physical specifications for devices
26
TCP/IP Model
Application, transport, internet, network access
27
Application (TCP/IP Model)
Where high-level protocols such as SMTP and FTP operate.
28
SMTP
Simple mail transfer protocol
29
FTP
File transfer protocol
30
Transport (TCP/IP Model)
Specifies which application requested or is receiving data through specific ports
31
Internet (TCP/IP Model)
Where IP addressing and routing take place
32
Network Access (TCP/IP Model)
Where MAC addressing and physical components of the network exist
33
TCP
Transmission control protocol. Responsible for reliable delivery
34
IP
Internet protocol. Responsible for adding source and destination addressing to the data
35
Protocol + topology =
networking
36
Bus
network in which nodes are directly connected to a common linear (or branched) half-duplex link
37
What are the 3 types of topology?
Bus, star, token ring
38
RFC
Request for comments. E.g. RFC 792 - internet control message protocol
39
10Base-T
Category 3, transfers data at a rate of 10 Mb/s
40
100Base-TX
Category 5, At 100 Mb/s, transfer rates of 100BASE-tX are ten times that of 10BASE-T
41
1000BASE-T
Category 5e, 6. The 1000BASE-T architecture supports data transfer rates of 1 Gb/s
42
10GBASE-T
Category 6a, 7. The 10GBASE-T architecture supports data transfer rates of 10 Gb/s
43
IEEE 802.3 standard
Several physical implementations that support Ethernet
44
1000BASE-T
Most commonly implemented Ethernet architecture today
45
CSMA/CA
IEEE 802.11. Standard that specifies connectivity for wireless networks.
46
802.11a, 802.11b, and 802.11g
standards should be considered legacy
47
Open system and Shared key authentication
Two types of authentication were introduced with original 802.11 standard
48
Wired equivalent privacy (WEP), Wi-Fi protected access (WPA), IEEE 802.11i/WPA2
Three shared key authentication techniques for WLANS
49
HUBs
Receive data on one port and send out to all other ports
50
Bridges
Introduced to divide LANs into segments.
51
Switches
Filters and segments network traffic by sending data only to the device to which it is sent
52
Wireless Access Points
Provide network access to wireless devices. E.g. Laptops and tablets
53
Routers
Uses IP addresses to forward traffic to other networks
54
Firewall
Resides between two or more networks and protects data and equipment on a network from unauthorized access
55
Repeater
Regenerates weak signals to effectively extend the distance a signal can travel
56
Modem
Converts a computer's digital data into a format that can be transmitted on the ISP's network
57
PoE Switch
Transfer small amounts of DC current over Ethernet cable, along with data, to power special devices
58
Patch Panel
A place to collect incoming cable runs from the various networking devices throughout a facility
59
Network cables (examples)
E.g. twisted-pair cable, coaxial cable, fiber-optic cable
60
Coaxial cables
usually constructed either copper or aluminum. E.g used by both cable television companies and satellites
61
Twister-pair cables
Type of copper cabling used for telephone communications and most Ethernet
62
Fiber-Optic cables
Composed of two kinds of glass (core and cladding)
63
Types of fiber media
Single-mode fiber (SMF), and multimode fiber (MMF)
64
What are the 2 types of addresses?
Media access control (MAC) and IP address
65
MAC
hard coded onto NIC (network interface card) by manufacturer. 48 bits. Can represent on of the three hexadecimal formats.
66
The two types of IP addresses are?
IPv4 or IPv6
67
IPv4
32 bits in dotted decimal notation. E.g. 192.168.200.8
68
IPv6
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
Class A (IPv4)
First Octet - 0-127. Subnet mask - 255.0.0.0 Number of hosts p/ network - 16,777,217
70
Class B (IPv4)
First Octet - 128-191 Subnet mask - 255.255.0.0 # of hosts p/network - 65,534
71
Class C (IPv4)
First Octet - 192-223 Subnet mask - 255.255.255.0 # of hosts p/network - 254
72
Subnet mask 255.0.0.0, prefix?
/8
73
Subnet mask 255.255.0.0, prefix?
/16
74
Subnet mask 255.255.255.0, prefix?
/24
75
Does not require acknowledgements?
UDP
76
Delivers data as it arrives
UDP
77
Reliable
TCP
78
Fast
UDP
79
Resends lost data
TCP
80
Delivers data in sequenced order
TCP
81
Low overhead
UDP
82
Does not resend lost data
UDP
83
Acknowledges data
TCP
84
UDP
User datagram protocol
85
80 protocol
Hypertext Transfer Protocol (HTTP)
86
53 protocol
Domain Name Service (DNS)
87
21 protocol
File Transfer Protocol (FTP)
88
548 or 427 protocol
Apple filing protocol (AFP)
89
110 protocol
Post office protocol V3 (POP3)
90
22 protocol
Secure shell (SSH)
91
25 protocol
Simple mail transfer protocol (SMTP)
92
143 protocol
Internet message access protocol (IMAP)
93
443 protocol
Hypertext transfer protocol secure (HTTPS)
94
445 protocol
Server message block (SMB)
95
How many devices can a bluetooth device connect to simultaneously?
7
96
Which layer of the OSI model is responsible for logical addressing and routing?
Network
97
When would a printer be considered a network host?
when it is connected to a switch
98
Which device provides wireless connectivity to users as its primary function?
Access point
99
Which technology is most often used to connect devices to a PAN?
Bluebooth
100
What is a characteristic of a WAN?
It connects multiple networks that are geographically separated.
101
What is the correct order of the layers of the TCP/IP model from the top layer to the bottom?
application, transport, internet, network access
102
What TCP/IP model layer is responsible for MAC addressing?
Network access
103
What PDU is associated with the network layer of the OSI model?
Packet
104
What is identified by the 100 in the 100BASE-TX standard?
the maximum bandwidth in Mb/s
105
Which IEEE standard operates at wireless frequencies in both the 5 GHz and 2.4 GHz ranges?
802.11n
106
Which network device makes forwarding decisions based on the destination MAC address that is contained in the fram?
switch
107
A _ uses IP addresses to forward traffic from one network to other networks.
Router
108
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?
Fiber optic
109
Which term describes a type of coaxial cable?
RG-6
110
Which pairs of wires change termination order between the 568A and 568B standards?
Green and orange
111
Which two types of signal interference are reduced more by STP than by UTP?
RFI and EMI
112
How many host addresses are available on a network with a subnet mask of 255.255.0.0?
65,534
113
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?
The computer cannot communicate with a DHCP server.
114
What is a characteristic of the UDP protocol?
Low overhead

CITX 1110 (5 decks)

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