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Network + > Messer 5 > Flashcards

Messer 5 Flashcards

1
Q

Which layer is called the post office layer

A

Transport Layer

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2
Q

Which layer utilizes port numbers

A

Transport

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3
Q

Which layer starts an stops communication

A

Session Layer

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4
Q

Which layers deals with Half and full duplex

A

Session Layer

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5
Q

Control and tunneling protocols are present in which layer

A

Session

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6
Q

Which layer deals with character encoding

A

Presentation Layer

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7
Q

Which layer deals with encryption

A

Presentation

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8
Q

Which layer are part of the Secure Socket Layer

A

Layers 5-7

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9
Q

Which layer adds a trailer and header

A

Link Layer of TCP IP model

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10
Q

Baseband is usually

A

A single cable

consumes bandwidth on wire 0 or 100%
Can be bidirectional

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11
Q

Broadband

A

Multiple signals over the same medium

Each signal uses its on freq or channel

Examples

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12
Q

Examples of broadband

A

Cable
Internet
VOIP

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13
Q

Describe Baud Rate

A

Associated with modems
Number of symbols per sec
Number of times signal state changes

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14
Q

Bit Rate

A

Bits maybe communicated in a single symbol

Total number of bits per sec is the bit rate

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15
Q

Bit vs Baud Rates

A

Bit Rate can be referred to the number of passengers

Baud rate can be associated with the number of train cars

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16
Q

High frequencies have long or short wavelengths

A

Short

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17
Q

TDM

A

Time Division Multiplexing

ISDN or Sonet networks

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18
Q

FDM

A

Frequency Division Multiplexing

Radio Stations

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19
Q

Wavelength division multiplexing

A

WAN networks

Fiber Connections

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20
Q

Base 16 Hex

A

4096
256
16
1

0=0
1=1
2=2
3=3
4=4
5=5
6=6
7=7
8=8
9=9
10=A
11=B
12=C
13=D
14=E
15=F

1 bite = 8 bits

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21
Q

Decimal value of 0x8

A

8

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22
Q

Decimal value of 0xC

A

12

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23
Q

Value for 14

A

E

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24
Q

Decimal value of 0X27

A

162=32
71=7
Total is 39

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25
Q

Decimal value of 0X3C

A

316=48
121=12
Total is 60

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26
Q

Hex value of 122 decimal

A 
122/16=7
10/1=10
so
7=7
10=A

Answer 7A

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27
Q

Hex value of 350 decimel

A

350/*256 = 1

94/16 = 5

14/1=14

Answer is 0X15E

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28
Q

Octal Math

A

Base 8

Used with Unix or Linux

8 bits to make a byte

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29
Q

Octal conversion chart

A

512
64
8
1

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30
Q

Decimal value of 27 octal

A

8*2 = 16

7*1 = 7

16 + 7 = 23

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31
Q

Decimal value of 233 octal

A

64 * 2 = 128

8 * 3 = 24

1 * 3 = 3

128 + 24 + 3 = 155

Answer is 155

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32
Q

Octal value of 122 decimal

A

122 / 64 = 1 r58

58 / 8 = 7 r 2

2 / 1 = 2

Answer is 172 octal

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33
Q

Octal value of 200 decimal

A

200 / 64 = 192

8 / 8 = 1

0 / 1 = 0

Answer is 193 octal

34
Q

CSMA/CD

A

Carrier Sense Multiple Access / Collision Detect

Half Duplex Ethernet

35
Q

CSMA/CA

A

Carrier Sense Multiple Access /Collision Avoidance

Full Duplex

Used for wireless

uses RTS/CTS ready to send or clear to send

36
Q

TCP IP Layers

A

Application
Transport
Internet
Link

37
Q

TCP IP Suite application layer protocols

A 
FTP
DHCP
TFTP
DNS
HTTP
TLS
SSL
VOIP
SSH
POP3
IMAPv4
NTP
Telnet
SMTP
SNMP
38
Q

TCP IP transport layer protocols

A

TCP

UDP

39
Q

TCP IP internet layer protocols

A

IPv4
IPv6
ICMP
IGMP

40
Q

TCP IP link layer protocols

A

ARP

41
Q

Wireless Network Standard

A

802.11

42
Q

802.11a

A

5GHZ

54 Mbit/s

smaller range than 802.11b

signal absorbed by surroundings

No longer used

43
Q

802.11b

A

2.4 GHz

11 Mbs

Better range less absorption

Freq range is congested

44
Q

802.11g

A

2.4 GHz

54 MBs

backwards compatible with 802.11b

Freq congestion

45
Q

802.11n

A

5 or 2.4 GHz

600 MBs

Uses MIMO

46
Q

802.11ac

A

5GHz

Increased channel bonding

Denser signal modulation

8 MIMO streams

47
Q

Security policy describes what

A

how data is secured

48
Q

Name some agreements

A 
SLA
MOU informal
MOA
MSA - master service agreement multiple projects
SOW
49
Q

What’s a good humidity to control ESD

A

60% but this much humidity is very uncomfortable

50
Q

What is fail open

A

all security features are opened automatically

51
Q

What is Fail close

A

all security features are activated and closed during an emergency

52
Q

name some passive cable termination

A

punch down block

patch panel

53
Q

Main Distro Frame

A

Usually locatded in the data center

Serves as good test point

Central point of data

54
Q

IDF

A

Intermediate Distro Frame

Extension of MDF

Houses switches for a floor

55
Q

UPS

A

Backup power for 20 mins

Good for blackouts
brownouts
surges

56
Q

Types of racks

A

Two post – telecommm equipment

Four Post

57
Q

how is a data center air handled

A

Hot aisle

Cold aisle

58
Q

FTP

A

Port 20/21

transfer files

USid and pasword

59
Q

TFTP

A

Port 69

NO authentication

Very simple file transfer

Not used on production networks

60
Q

SNMP

A

Port 161

Gather info about network devices

SNMP v3 has
integrity authentication and encryption

61
Q

Telnet

A

Port 23

Login into remote devices

Clear txt passwords and usids

62
Q

SSH

A

Port 22

Like a secure version of telnet

63
Q

DNS

A

port 53

correlates ips to common names

64
Q

DHCP

A

Port 67/68

Dynamic or Static

65
Q

smb

A

Port 137/138/139

Server message block

Called a common Interment File System

66
Q

RDP

A

Port 3389

67
Q

TCP

A

Connection oriented

Reliable delivery

Can handle out of order messages

68
Q

UDP

A

Connecitionless

No formal setup or tear down

Fire and forget

Unreliable

69
Q

Ephemeral Port

A

Temporary ports

70
Q

Non Ephemeral Port

A

Permanent port numbers

Usually on servers

71
Q

HTTP Port

A

80

443

72
Q

NetBIOS Port

A

137
138
139

73
Q

POP

A

110

For receiving client email

74
Q

IMAP

A

143

new email client protocol

75
Q

SMTP

A

25

Transfer email between email servers

76
Q

SIP

A

5060/5061
Session Intiated Protocol

Voice over IP signaling

77
Q

MGCP

A

2427

78
Q

RTP

A

5004/5005

79
Q

H.323

A

1720

80
Q

Done

A

Done

Network + (13 decks)

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