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COMPTIA A+ 220-1001 > Messer - Section 2 > Flashcards

Messer - Section 2 Flashcards

1
Q

IP Data Transmission as “Moving Vans”:

  • Road
  • Van
  • Cargo Area
  • Boxes
A

Road - Ethernet, DSL, or Cable
Van - Internet Protocol
Cargo Area - OSI Layer 4 Encapsulating and Multiplexing TCP and UDP
Boxes - TCP and UDP

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2
Q

TCP

A

Transmission Control Protocol

  • Connection-oriented, formal setup and close
  • “Reliable” Delivery
  • Receiver can manage data sent
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3
Q

UDP

A

User Datagram Protocol

  • Connectionless, no formal open or close
  • “Unreliable” Delivery
  • Sender determines amount of data transmitted
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4
Q

IP Data Transmission between “Houses”

  • Moving Van
  • Origin House
  • Destination House
  • Rooms
A

Moving Van - Move TCP/UDP along “road”
Origin - Origin IP address
Destination - Destination IP address
Rooms - TCP/UDP “box” is dropped in correct port

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5
Q

Non-ephemeral ports

A

Permanent port numbers
Ports 0 - 1023
Usually on a server or service

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6
Q

Ephemeral ports

A

Temporary port numbers
Ports 1024 - 65,535
Determined in real-time by the client

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7
Q

FTP

A

File Transfer Protocol
Sends and receives files between systems
tcp/20, tcp/21

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8
Q

SSH

A

Secure Shell
Encrypted console access
tcp/22

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9
Q

Telnet

A

Telecommunication Network
Insecure console access
tcp/23

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10
Q

SMTP

A

Simple Mail Transfer Protocol
Transfer email between mail servers
tcp/25

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11
Q

DNS

A

Domain Name System
Convert domain names to IP addresses
udp/53, tcp/53

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12
Q

HTTP

A

Hypertext Transfer Protocol
Web server communication
tcp/80

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13
Q

HTTPS

A

Hypertext Transfer Protocol Secure
Web server communication with encryption
tcp/443

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14
Q

POP3

A

Post Office Protocol Version 3
Receive email into an email client
tcp/110

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15
Q

IMAP4

A

Internet Message Access Protocol Version 4
A newer email client protocol
tcp/143

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16
Q

RDP

A

Remote Desktop Protocol
Graphical display of remote devices
tcp/3389

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17
Q

NetBIOS Name Service

A

NetBIOS Name Service
Register, remove, and find Windows services by name
udp/137

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18
Q

NetBIOS Datagram Service

A

NetBIOS Datagram Service
Windows connectionless data transfer
udp/138

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19
Q

NetBIOS Session Service

A

NetBIOS Session Service
Windows connection-oriented data transfer
tcp/139

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20
Q

SMB

A

Server Message Block
Windows file transfers and printer sharing
tcp/445

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21
Q

AFP

A

Apple Filing Protocol
Mac OS file transfers
tcp/548

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22
Q

SLP

A

Service Location Protocol
Find Mac OS services by name
tcp/427, udp/427

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23
Q

DHCP

A

Dynamic Host Configuration Protocol
Automate the IP address configuration process
udp/67, udp/68

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24
Q

LDAP

A

Lightweight Directory Access Protocol
Directory services
tcp/389

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25
Q

SNMP

A

Simple Network Management Protocol
Gather metrics and manage network devices
udp/161

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26
Q

802.11a

A 
5 GHz
Streams N/A
Max throughput/stream = 54 Mbit/s
Max throughput/total = 54 Mbit/s
20 MHz bandwidths
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27
Q

802.11b

A 
2.4 GHz
Streams N/A
Max throughput/stream = 11 Mbit/s
Max throughput/total = 11 Mbit/s
22 MHz bandwidths
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28
Q

802.11g

A 
2.4GHz
Streams N/A
Max throughput/stream = 54 Mbit/s
Max throughput/total = 54 Mbit/s
20 MHz bandwidths
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29
Q

802.11n

A

5 GHz and/or 2.4 GHz
4 MIMO Streams
Max throughput/stream = 150 Mbit/s
Max throughput/total = 600 Mbit/s
20 or 40 MHz (2 contiguous 20 MHz bonded channels)
In 2.4 GHz, a 40 MHz channel uses much of bandwidth

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30
Q

802.11ac

A 
5 GHz
8 MIMO Streams
Max throughput/stream = 866.7 Mbit/s
Max throughput/total = 6.8 Gbit/s
40 MHz for 802.11n stations
80 MHz required for 802.11ac stations
160 MHz optional (contiguous channels or non-contiguous bonded channels)
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31
Q

How many bits long is a NIC physical address

A

48

32
Q

MAC

A

Media Access Control

A device’s physical address

33
Q

POE

A

Power Over Ethernet

34
Q

PLC

A

Power Line Communication

35
Q

Allows network devices such as SOHO routers to be automatically configured, sometimes referred to as needing “zero configuration”.

A

Wifi Protected Setup (WPS)

36
Q

Allows you to access a computer on your internal network from a computer on the internet.

A

Port forwarding

37
Q

Change the priority of network traffic, such as giving a higher priority to one type of traffic over another. Also known as “Throttling”.

A

Quality of Service (QoS)

38
Q

Limits which devices can access your wireless network by specifying the MAC addresses that are allowed to connect to the network.

A

MAC filtering

39
Q

To avoid interference from nearby wireless networks, you can change this setting on your wireless network so that it uses a unique frequency.

A

Dynamic Frequency Selection (DFS)

40
Q

RFID

A

Radio Frequency Identification

41
Q

NFC

A

Near Field Communication

42
Q

What is the IEEE spec number that standardized Zigbee?

A

802.15.4 PAN

43
Q

Which has the longer transmission distance: Zigbee or Z-Wave

A

Z-Wave

44
Q

Z-Wave operate a the ___ MHz range.

A

915

45
Q

System prevents intrusions from accessing network

A

Intrusion Prevention System (IPS)

46
Q

Server that stores and sends emails

A

Email server

47
Q

Server that automatically assigns IP addresses to hosts on a network

A

Dynamic Host Control Protocol server (DHCP)

48
Q

Server that accepts logons from users and allows/disallows access to network resources based on the permissions assigned to each user.

A

Authentication server

49
Q

Server that responds to browser requests using protocols such as HTML

A

Web server

50
Q

Centralized server used to store documents that users can access.

A

File server

51
Q

Intermediate server that sits between you and some 3rd party resource such as the Internet.

A

Proxy server

52
Q

Server used to manage all network hosts from a single location.

A

Endpoint Management server

53
Q

Server that uses protocols such as IPP, LPD and SMB to provide printing services for host on a network.

A

Printer server

54
Q

Single device that combines multiple security features such as firewall, URL filtering, content inspection, malware inspection, IDS/IPS, router, switch, etc.

A

All in one appliance

55
Q

Server that converts domain names to IP addresses

A

Domain Name Servier (DNS)

56
Q

System that detects intrusions that have occurred on a network by triggering an alert or alarm.

A

Intrusion Detection System (IDS)

57
Q

System that is considered older technology.

A

Legacy

58
Q

Systems that are not the normal operating system you work with, but still have connectivity to the network and must be managed.

A

Embedded

59
Q

Server that acts as a central logging receiver, gathering logging data from network devices

A

Syslog

60
Q

Server roles used to provide access to the LAN and internet.

A

DNS, DHCP, Proxy

61
Q

Resolves a friendly name to an IP address

A

DNS

62
Q

Automatically assigns IP addresses to clients

A

DHCP

63
Q

Reserves a specific IP address for a networking device

A

DHCP

64
Q

Provides the IP address of the mail server in your domain

A

DNS

65
Q

Keeps track of IP addresses for .com, .gov, .org, etc.

A

DNS

66
Q

Processes discover requests and provides an offer

A

DHCP

67
Q

Logically separates computers into multiple broadcast domains

A

VLAN

68
Q

Used by teleworkers to seamlessly connect to their company’s internal network

A

VPN

69
Q

A 128-bit IP address

A

IPv6

70
Q

A 32-bit IP address

A

IPv4

71
Q

Translates multiple private IP addresses into a single public IP address

A

NAT

72
Q

A computer automatically assigned an address beginning with 169.254. What acronym describes this address and why was it assigned

A

APIPA (Automatic Private IP Addressing)

DHCP is down.

73
Q

DHCP Process

A

Discover, Offer, Request, Acknowledge

74
Q

How do you test the local loopback IPv6 address?

A

::1

75
Q

WMN

A

Wireless Mesh Network

76
Q

What is one thing to keep in mind when measuring resistance with a multimeter?

A

Make sure no current is flowing through the circuit.

77
Q

Which tool can help determine where a break exists in a given cable run?

A

Time Domain Reflectometer

COMPTIA A+ 220-1001 (3 decks)

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