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Technology > ITN101 - Intro to Network Concepts - Exam 1 - Review > Flashcards

ITN101 - Intro to Network Concepts - Exam 1 - Review Flashcards

1
Q

DHCP

A

Dynamic Host Configuration Protocol

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2
Q

Air waves are an example of what type of network component?

A

network medium

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3
Q

a device that connects other devices to each other, and allows for data transmission. It’s smarter than a Hub, and is used for LAN transmission

A

Switch

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4
Q

Type 2 Hypervisor

A

Installs in a host OS as an application and is called a hosted hypervisor. (VirtualBox)

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5
Q

A routing protol is either ___ or ___

A

IGP (Interior Gateway Protocols) or EGP (Exterior Gateway Protocols)

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6
Q

When referring to network bandwidth, what is the basic unit of measurement?

A

bits per second

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7
Q

What type of transmission is occurring when data flows both ways

A

Full-duplex mode

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8
Q

3 Main Types of Cabline

A

Fiber, ethernet, coaxial

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9
Q

In wireless networks, what type of media access control is used?

A

CSMA/CA

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10
Q

What command would you issue from a command prompt to see a listing of the computers in your workgroup?

A

net view

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11
Q

ipconfig(Windows) / ifconfig(Linux)

A

shows current TCP/IP addressing and domain name information

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12
Q

ICMP

A

Internet Control Message Protocol - Network Layer - Reports on the success or failure of data delivery

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13
Q

OSI Layer 3

A

Network Layer

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14
Q

What is not true of forward error error correction?

A

Always used because it is cheap.

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15
Q

Routing Protocols Examples

A

RIP, RIPv2, BGP, ISIS, OSPF

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16
Q

A wireless access point is most like which other network device, in that all computers send signals through it to communicate with other computers?

A

hub

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17
Q

PaaS

A

Platform as a Service - Developers often require access to multiple platforms during dev process. Rather than purchasing and maintaining a seperate device for each platforkm they can subscribe to PaaS.

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18
Q

Binary base

A

2

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19
Q

How many bits is an IPV6 address?

A

128 (8 blocks of 16 bits)

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20
Q

Which structured cabling component provides connectivity to computer equipment in the nearby work area?

A

IDF

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21
Q

OSI Layer 1

A

Physical Layer

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22
Q

Layer 2

A

Data Link Layer - Encapsulates the data with header and footer and creates framee

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23
Q

Ethernet uses carrier sense multiple access (CSMA) to handle collisions. Wired ethernet uses (1) ______ while Wireless uses (2) ____

A

collision detection

collision avoidance

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24
Q

PAT

A

Port Address Translation

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25
Q

Ethernet - Twisted Pair

A

Twisted-Pair Cable Twisted-pair cable consists of color-coded pairs of insulated copper wires, each with a diameter of 0.4 to 0.8 mm (approximately the diameter of a sewing pin). Every two wires are twisted around each other to form pairs, and all the pairs are encased in a plastic sheath,

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26
Q

Fiber Optic

A

Fiber-optic cable, or simply fiber, contains one or several glass or plastic fibers at its center, or core. Data is transmitted through the central fibers via pulsing light typically sent from one of two possible sources: • laser—An intense, focused light that can travel extremely long distances with very high data throughput • LED (light-emitting diode)—A cool-burning, long-lasting technology used on shorter fiber-optic connections, such as between floors in a building or between a switch and a router

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27
Q

Which of the following protocols uses a three-way-handshake to establish a connection before transmitting the payload/message?

A

TCP

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28
Q

ping

A

Used to verify that =TCP/IP is installed and uses ICMP (Internet Control Message Protocol)

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29
Q

dig

A

provides more detailed information than nslookup

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30
Q

Last 24 bits of MAC address

A

Extension Identifier or Device ID

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31
Q

SMTP Port

A

25

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32
Q

Port 443

A

HTTPS

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33
Q

TCP

A

Transmission Control Protocol - Provides reliable data delivery services (3way handshake)

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34
Q

Port

A

Assigned to a process such as an application or service that can recieve ata.

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35
Q

IaaS

A

Infrastructure as a Service - Hardware services are provides birtually. HVD’s (Histed Virtual Desktops) are different desktop operating enviornments on a different computer that require network infrastructure that IaaS provides.

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36
Q

Hub Layer

A

Layer 1

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37
Q

There are two dynamic routing algorithms (1) _______ is based on the number of hops between two devices while (2)_______ is based on the number of hops, circuit speed, and traffic congestion - which provide more reliable and up to date paths to destinations.

A

distance vector

link state

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38
Q

Public IP addresses

A

Class A, B and C licensed

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39
Q

Layer 1

A

Phisical Later - on NIC and recieves the frame and places the actual transmission on the network

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40
Q

Exhausted DHCP scope

A

when the IP addresses are used up and no new clients can connect to the network

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41
Q

Which of the following is true about collisions?

A

They can occur on Ethernet half-duplex networks

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42
Q

What is middleware?

A

Software that acts as an intermediary by sitting between client and server applications and provides a standard way of translating between software from different vendors

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43
Q

Hypervisor

A

Creates and manages a VM and manages resource allocation

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44
Q

What type of network covers a small geographical area such as a single floor or a single building?

A

Local Area Network (LAN)

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45
Q

any end device that requests or transfers data to a server

Operated by end user (desktop, laptop, tablet, phone, ATM, kiosk, etc.)

A

Client

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46
Q

How boos signal

A

Repeater

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47
Q

What type of transmission is occurring when data can flow in both directions, but only one at a time?

A

Half-Duplex

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48
Q

Which of the following is NOT one of the main differences between the types of network cabling?

A

the ability to send and receive signals

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49
Q

What Layer of the OSI Reference Model does not contain any protocols, and has the job of formatting, encrypting, and compressing the data?

A

Presentation

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50
Q

What does DNS do?

A

Translates IP

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51
Q

In a physical bus topology, both ends of the medium must be terminated in order to prevent what?

A

signal bounce

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52
Q

a device that connects other devices to each other, and allows for data transmission. It’s smarter than a switch, and is used for WAN transmission

A

Router

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53
Q

Each cable type can transport data at a particular speed only so far before its signals begin to weaken past the point that a receiving station can read them accurately What is the term for this phenomenon?

A

attenuation

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54
Q

How many bits is an IPv4 address?

A

32

55
Q

When a tech refers to a hostname it is assumed they are referring to the ____

A

FQDN

56
Q

What is attenuation

A

Signal degredation

57
Q

Routing Protocols

A

Go forth to collect data about the current network status and to contribute to the selection of best paths

58
Q

DHCP

A

Dynamic Host Configuration Protocol (Application Layer)

59
Q

OSI Layer 7

A

Application Layer

60
Q

Last part of FQDN (com)

A

TLD Top Level Domain

61
Q

nslookup

A

Allows you to query the DNS database from any computer on the network and find the host name of a device by specifying the IP address and vice versa

62
Q

FQDN

A

Fully Qualified Domain Name (www.site.com)

63
Q

Layer 3

A

Network Layer - adds its own header which identifies IP address of destination most and message is called a packet

64
Q

Port 80

A

HTTP

65
Q

What is Multiplexing?

A

A form of transmission that allows multiple signals to travel over one medium.

66
Q

Domain Name

A

Last two parts of hosts name (site.com)

67
Q

Dual Stacked

A

When a network uses both IPV4 and IPV6

68
Q

OSI Layer 5

A

Session Layer

69
Q

You have just started a new business. You need to have three to four workstations available for your employees who simply need to share some files and a printer, but you don’t have a large budget. Security is not a major concern, but costs are. What type of network would be the most appropriate for your situation?

A

peer-to-peer network

70
Q

Ethernet - Twisted Pair

A

Twisted-Pair Cable Twisted-pair cable consists of color-coded pairs of insulated copper wires, each with a diameter of 0.4 to 0.8 mm (approximately the diameter of a sewing pin). Every two wires are twisted around each other to form pairs, and all the pairs are encased in a plastic sheath,

71
Q

3 Models of Cloud

A

PaaS
IaaS
SaaS

72
Q

Largest possible IPV4

A

255.255.255.255

73
Q

Wireless con

A

Attenuation

74
Q

Which of the following is NOT an email related protocol?

A

HTML

75
Q

public key encryption

A

encryption—Data is encrypted with a private key known only to the user, and decrypted with a mathematically related public key that can be made available through a third-party source, such as a public key server. This ensures data integrity, as the sender’s public key will only work if the data has not been tampered with. Alternatively, data can be encrypted with the public key, and then can only be decrypted with the matching private key. This ensures data confidentiality, as only the intended recipient (the owner of the keys) can decrypt the data. A public key server is a publicly accessible host (such as a server on the Internet) that freely provides a list of users’ public keys, much as a telephone book provides a list of peoples’ phone numbers. The combination of a public key and a private key is known as a key pair. Because public key encryption requires the use of two different keys, one to encrypt and the other to decrypt, it is also known as asymmetric encryption.

76
Q

OUI

A

Organizationally Unique Identifier

77
Q

Ethernet num

A

802.3

78
Q

First 28 bits of MAC address

A

OUI

79
Q

How many bits is a MAC address?

A

48

80
Q

A user device used to access the network and received data from the server is called a _____. These include desktops, laptops, tablets, phones, etc.

A

Client

81
Q

Technique designed to conserve the number of public IP addresses needed by the network

A

NAT

82
Q

Wireless security risks

A

.

83
Q

Router Layer

A

Layer 3

84
Q

Which type of wireless technology bounces transmissions off walls and ceilings to deliver signals from sender to receiver and is often used with TV remotes?

A

scatter infrared

85
Q

Wireless Pro

A

Connectivity

86
Q

Hostname

A

First part of FQDN (www)

87
Q

Port 25

A

SMTP

88
Q

Which of the following describes this: As data travels down the protocol stack, headers and trailers are wrapped around it so that it knows where to go and how to get there

A

Encapsulation

89
Q

Switch Layer

A

Layer 2

90
Q

What type of network covers a large geographic area, often composed of leased circuits, and may span hundreds or thousands of miles?

A

Wide Area Network (WAN)

91
Q

OSPF

A

Routing Protocol (Open Shortest Path First)

92
Q

IP

A

Internet Protocol - NEtwork Layer - Secifies where data should be delivered, identifying data’s source and destination IP address.

93
Q

What is a disadvantage of using fiber-optic cabling versus twisted-pair cabling?

A

more difficult to install

94
Q

Which of the following is the physical topology that is daisy-chained like a bus and in which the cabling is brought around from the last device to the first device?

A

physical ring

95
Q

What is one of the disadvantages of a server-based network compared to a peer-to-peer network?

A

additional costs

96
Q

OSI Layer 2

A

Data Link Layer

97
Q

Default Gateway

A

Gateway device that nodes on the network turn to first for access to the outside world

98
Q

What protocol is used for mapping domain names to IP addresses, and what port does it use?

A

DNS:53

99
Q

Hex base

A

16

100
Q

HTTPS

A

Port 443

101
Q

Address Translation

A

When a gateway takes a private IP and converts it to a public IP for connecting to the internet (PArt of NAT)

102
Q

HTTP

A

Port 80

103
Q

Protocols…

A

Specifies the rules, functionality, and messages for communication at each layer

104
Q

OSI Layer 4

A

Transport Layer

105
Q

Type 1 Hypervisor

A

Installs on a computer before any OS and is therefore called a bare metal hypervisor. (VMWARE HYUPERV)

106
Q

Subnet MAsk

A

A 32 bit number that helps one computer find another. 32 bits help indicate portios that are the network ID and host ID

107
Q

ARP

A

Address Resolution Protocol - works with IPV4 to discover the MAC of node and to maintain a database that maps local IP addresses to MAC addresses

108
Q

SaaS

A

Software as a Service- Applications provides through an online user interface

109
Q

Wireless Number q

A

802.11

110
Q

OSI Layer 6

A

Presentation Layer

111
Q

What device is needed to convert analog signals to digital signals, and then vice versa?

A

Modem

112
Q

NAT

A

Network Address Translation

113
Q

most popular DNS server

A

BIND (Berkeley Internet Name Domain)

114
Q

Coaxial

A

Coaxial cable, called “coax” for short, was the foundation for Ethernet networks in the 1980s. You’ll most likely never see a coaxial cable network, as coax has been replaced by twisted-pair cable and fiber; however, a form of coax is still used for cable Internet and cable TV.

115
Q

The TCP/IP Model has four layers. Which layer of the OSI Reference Model is NOT part of the TCP/IP Model’s Application Layer?

A

Session (application)

116
Q

UDP

A

User Datagram Protocol - Unreliable cnnectionless protocol that provides no handshake and is faster than TCP

117
Q

Which Protocol does NOT belong in the Application Layer

A

IP

118
Q

When two or more devices transmit at the same time, a ______ can occur.

A

Collision

119
Q

What command would you issue from the command prompt to test whether your computer has connectivity to the network?

A

ping IPaddress

120
Q

any device that requests or transfers data to a client

End users will not physically touch these normally

A

Server

121
Q

What is the movement of computer information from one point to another by means of electrical or optical transmission systems?

A

Data Communications

122
Q

a device that connects other devices to each other, and allows for data transmission. It’s a dumb device

A

Hub

123
Q

ipconfig

A

Used to find out the current TCP/IP settings

124
Q

You want a fast CPU for the new computer you are building and your motherboard only has one CPU socket. To increase the processing power, you need a CPU that provides more than one processor. What is this CPU called?

A

multicore

125
Q

When a frame is received, which component reads the source and destination MAC addresses, looks up the destination to determine where to send the frame, and forwards it out the correct port?

A

switch

126
Q

Dynamic IP address

A

Decive configured to request and recieve a different IP address from DHCP server each time it connects to the network

127
Q

The OSI Reference Model has seven layers. What is layer three of the OSI Reference Model?

A

Network

128
Q

What is attenuation?

A

The gradual decrease in signal the further it travels.

129
Q

Just as a switch keeps records of MAC addresses that it has learned, so does your computer. What protocol does your computer use to learn MAC addresses?

A

ARP

130
Q

What protocol is used for moving files between clients and servers?

A

FTP

131
Q

Which of the following is NOT a characteristic of Unshielded Twisted Pair cabling?

A

maximum speed is 100 Mbps

132
Q

Gateway

A

Computer, router or other device that a host uses to access another network

133
Q

Unicast address specifies a

A

single node on IPV6 network

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