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Network + > Lesson 4 > Flashcards

Lesson 4 Flashcards

1
Q

Physical diagrams describe what

A

wiring layouts

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2
Q

Logical Diagram

A

describes that paths through which data moves

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3
Q

Which diagram describes how data moves

A

Logic diagram

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4
Q

Common physical topologies are

A

Star
Bus
Ring
Mesh

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5
Q

Physical Bus Description

A

Nodes are connecged in a linear fashion

T connector connecst each node to the network cable

Signal can reflect off the ends of the cable

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6
Q

Signal bounce

A

signals that reflect off the ends of the network cable

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7
Q

What can alleviate signal bounce

A

Terminators

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8
Q

Termination

A

Applying a resistor or other device at the end of a cable

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9
Q

Impedance Mismatch does what

A

impeded signal flow

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10
Q

Ring Topology

A

Each node is connected to the two nearest nodes

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11
Q

Why is signal flow in a ring unidirectional

A

To avoid collisions

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12
Q

Each node in a ring acts like a

A

Repeater

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13
Q

Are Rings reliable

A

No

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14
Q

Dual Ring Topology

A

More reliable and data moves in opposite directions

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15
Q

Does a star use a central connectivity device

A

Yes

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16
Q

What is a star central connectivity device

A

Hub

Switch

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17
Q

Will a fail node bring down a bus, ring or star

A

Ring

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18
Q

What will bring down a star topology

A

Failed central connectivity device

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19
Q

Are star nodes aware of one another

A

No

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20
Q

Are mesh nodes aware of one another

A

Yes

They are actually connected to one another

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21
Q

Mesh networks do not experience congestion and are very fast True or False

A

True

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22
Q

Is the mesh network reliable

A

Yes

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23
Q

What is a full mesh

A

When all nodes are connected to all nodesl the opposite is called a partial mesh

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24
Q

A partial mesh is sometimes referred to as what

A

redundant star

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25
Q

Is the internet a mesh or partial mesh

A

partial mesh

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26
Q

What’s a hybrid technology

A

exhibits more than one standard topology

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27
Q

Name some hybrid topologies

A

Star-bus
Extended Star
Star-Ring

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28
Q

Star Rings are commonly found in

A

MANs

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29
Q

Extended start topologies are commonly found in

A

LANs

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30
Q

Star Bus topologies are commonly found in local area networks

A

LANs

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31
Q

Do all nodes get the data in a logical bus?

A

Yes

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32
Q

In this logical topology, each node receives dat only from its upstream neighbor and retransmits data only to its downstream neighbor

A

Logical Ring

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33
Q

Logical Ring equals a physical

A

Star

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34
Q

Logical Bus equals a physical

A

Star

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35
Q

Topic B

A

Topic B

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36
Q

What info does logical topologies provide that physical topologies do not

A

Data transmission path

Data converges and diverges

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37
Q

Most popular wired network type

A

Ethernet because of simplicity and wide applicability

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38
Q

What serves as an interface between a network node and the network

A

NIC

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39
Q

Where are NIC cards located

A

Built into the motherboard

Located in an expansion slot

Externally connected to the computer

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40
Q

NICs operate in which modes

A

Half duplex

Full duplex

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41
Q

What is a transceiver

A

a device that has both a transmitter and receiver integrated into it

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42
Q

NICs have an auto negotiation feature that allows

A

device to perform self configuration to achieve the best possible mode of operation across a link

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43
Q

GBIC

A

Gigabit Interface Converter

Transceiver used to convert electrical signals into optical signals and vice versa

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44
Q

SFP

A

Small Form Pluggable

Transceiver is most commonly used in the 2Gbps and 4 Gbps

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45
Q

MAC Transceiver

A

Ethernet transceiver o AUO to Ethernet transceiver is a passive device that connects a 15 pin AUI Ethernet connector

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46
Q

Name the 802.x standards

A
  1. 2
  2. 3
  3. 3af
  4. 3at
  5. 11
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47
Q

What is Ethernet (802.3)

A

Technology and media access methods specified for LANs

Also called 802.3

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48
Q

Ethernet deals with which layers

A

Layer 1 and 2

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49
Q

Is Ethernet limited to ThinNet and ThihckNet

A

No

50
Q

What is ThinNet

A

Ethernet that uses RG58/U

51
Q

What is ThickNet

A

EtherNet that uses RG8

52
Q

What’s an Ethernet frame

A

Data packet that has been encoded at the Data Link Layer (Layer 2)

53
Q

The basic Ethernet frame contains how many fields

A

Seven

54
Q

Name the Ethernet Frame Fields

A 
Preamble
Start of Frame Delimiter
Destination Address
Source Address
Frame Type
Data 
Frame Check Sequence
55
Q

Describe a MAC address

A

6 Bytes long

3 Bytes belong to Org Unique Identifier

3 Bytes belong to Universal LANMAC address

Uses hexadecimal

56
Q

Pg 152-154

A

Pg 152-154

57
Q

Which standard covers Power over Ethernet

A

IEEE 802.3af

58
Q

Why is power over Ethernet good

A

It allows you to deliver power to the devices via the Ethernet cable

59
Q

What are AAA services for

A

Authentication
Authorization
Accounting

60
Q

What are the two types of switches

A

Managed and Unmanaged

61
Q

Describes a router

A

Works at Layer 3

Uses IP addressing

Can strip off Layer 2 info

62
Q

Can routers work with non routable protocols

A

No

63
Q

Routers only work with

A

Routable protocols

64
Q

Name the categories of routers

A

Access Routers

Distribution Routers

Core Routers

65
Q

Which type of router is used in a SOHO environment

A

Access routers

66
Q

Which type of router collects data from multiple access routers

A

Distribution Routers

67
Q

Purpose of a core router

A

Located at the center of network backbones

Used to connect multiple distribution routers located in different builidngs

68
Q

Purpose of a Gateway

A

Any device or software that translates one network protocol to another

69
Q

Gateways work a which layer

A

Layer 3

70
Q

What is a firewall

A

software or hardware to protect a device or network

71
Q

What’s an Analog modem

A

device that modulates signals to encode them into a digital format

72
Q

Modems are classified by

A

Bps

Baud rate

73
Q

Name some legacy network devices

A

Repeater

Hub

Bridge

74
Q

What is a collision domain

A

Nodes contend for access to the same physical medium because all nodes hear all transmissions

75
Q

Name two collision domains

A

Single hub domains

Buses

76
Q

Does each port on a switch become its own collision domain

A

Yes

24 Port switch has 24 collision domains

77
Q

If a 24 port switch is placed in full duplex mode, will any collisions occur

A

No

78
Q

Broadcast Domain

A

Network segment on which broadcasts occur

79
Q

Can micro segmentation stop broadcasts

A

No

80
Q

What do switches do with broadcasts by default

A

It sends it out to all ports

81
Q

What do routers do with broadcasts by default

A

They block broadcasts by default

82
Q

If a router has two Ethernet interfaces, does it has two broadcast domains

A

Yes

83
Q

Micro segmentation

A

A switch separates all nodes from each other logically until there is a need to connect them

84
Q

MAC Table

A

A switch learns the address of all nodes connected to its ports and places those addresses into a table.

A MAC table is also called a CAM table

85
Q

Managed switch are sometimes called

A

Intelligent switches

86
Q

How do you connect to a managed switch

A

via a web browser or management port

87
Q

Name some switch types

A

Multilayer

Content

88
Q

Name some switch modes

A

Cut Through

Fragment Free

Store and Forward

89
Q

Describe Spanning Tree Protocol

A

Layer 2 protocol

Used to prevent routing loops

90
Q

Do switches send broadcasts and multicast out all ports

A

Yes

91
Q

Switching Loops

A

Redundant paths between switches

Two switches connected using two different links

Ring of switches connected to each other

92
Q

Broadcast Storm

A

d

93
Q

Rapid Spanning Tree Protocol

A

Replaced STP

Usually takes about 20 seconds

94
Q

Shortest Path Bridging

A

Replaces STP

Enables multiple path routing

95
Q

Blocking

A

User data is not sent or received

96
Q

Listening

A

BPDUs are processed by the switch. It does not forward frames. It waits for information to determine if it should return to the blocked state. It does not update MAC tables

97
Q

Learning

A

Learns source addresses from received frames. Addresses are added to the switching database. MAC address table is updated. No frames are forwarded

98
Q

Forwarding

A

Data is sent and received on a port in this state. BPDUs are monitored to determine if the port should return to the blocked state

99
Q

Disabled

A

A port that has been manually disabled

100
Q

Topic E

A

Topic E

101
Q

What is a primary benefit of using switches and VLANs

A

To implement the concept of VLANs to segment a network

102
Q

What is a VLAN

A

logical grouping of ports on the switch

103
Q

Who determines which ports are grouped together

A

Admin

104
Q

Nodes that plug into a VLAN switch can only communicate with the nodes that belong to the same VLAN

A

T

105
Q

What is tagging

A

When a VLAN port group is extended to another device

106
Q

What is a native VLAN

A

A VLAN that handles traffic that is not tagged

107
Q

Name some uses for VLANs

A
  • Traffic management
  • It can be used to isolate a group of computers on their one VLAN
  • To separate nodes based on traffic type and the need for quality ofservice
108
Q

Can VLANs be extended beyond a single switch

A

t

109
Q

Can VLAN tagging keep different customer’s traffic separate

A

Y

110
Q

Can VLANs communicate with one another

A

Only if you use a router to send packets between them; otherwise. VLANs can only communicate with nodes located within that VLAN

111
Q

How can ports be assigned on a VLAN

A

Manually configuring each port on a switch to belong to a particular VLAN

Associating a VLAN with a node’s MAC address

112
Q

What is the advantage of assigning a port on a VLAN

A

If a user moves between locations, pligging a device into different ports the node always stays in the same VLAN

113
Q

What is port mirroring

A

The practice of duplicating all traffic on one port in a switch to a second port

114
Q

What are the types of port mirroring

A

Local port mirroring

Remote port mirroring

115
Q

What is trunking

A

Linkd]s can be combined to increase bandwidth and reliabiity

116
Q

Link Aggregation Control Protocol

A

a method to control the bundling of several physical ports

117
Q

What is the primary purpose of link aggregation

A

is to allow redundant links to combine their bandwidth together without causing spanning tree loops

118
Q

VLAN Pooling

A

mechanism whereby WAPs can choose among several different VLANs to assign to incoming Cleats connections

119
Q

VLAN Trunking Protocol

A

messaging protocol that switches use to update each other’s VLAN database

120
Q

Name three VTP modes

A

Server Mode

Client Mode

Transparent Mode

121
Q

Completed Deck

A

Completed Deck

Network + (13 decks)

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