Messer 5

Question 1

Which layer is called the post office layer

Answer 1

Transport Layer

Question 2

Which layer utilizes port numbers

Answer 2

Transport

Question 3

Which layer starts an stops communication

Answer 3

Session Layer

Question 4

Which layers deals with Half and full duplex

Answer 4

Session Layer

Question 5

Control and tunneling protocols are present in which layer

Answer 5

Session

Question 6

Which layer deals with character encoding

Answer 6

Presentation Layer

Question 7

Which layer deals with encryption

Answer 7

Presentation

Question 8

Which layer are part of the Secure Socket Layer

Answer 8

Layers 5-7

Question 9

Which layer adds a trailer and header

Answer 9

Link Layer of TCP IP model

Question 10

Baseband is usually

Answer 10

A single cable

consumes bandwidth on wire 0 or 100%
Can be bidirectional

Question 11

Broadband

Answer 11

Multiple signals over the same medium

Each signal uses its on freq or channel

Examples

Question 12

Examples of broadband

Answer 12

Cable
Internet
VOIP

Question 13

Describe Baud Rate

Answer 13

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

Question 14

Bit Rate

Answer 14

Bits maybe communicated in a single symbol

Total number of bits per sec is the bit rate

Question 15

Bit vs Baud Rates

Answer 15

Bit Rate can be referred to the number of passengers

Baud rate can be associated with the number of train cars

Question 16

High frequencies have long or short wavelengths

Answer 16

Short

Question 17

TDM

Answer 17

Time Division Multiplexing

ISDN or Sonet networks

Question 18

FDM

Answer 18

Frequency Division Multiplexing

Radio Stations

Question 19

Wavelength division multiplexing

Answer 19

WAN networks

Fiber Connections

Question 20

Base 16 Hex

Answer 20

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

Question 21

Decimal value of 0x8

Answer 21

8

Question 22

Decimal value of 0xC

Answer 22

12

Question 23

Value for 14

Answer 23

E

Question 24

Decimal value of 0X27

Answer 24

162=32
71=7
Total is 39

Question 25

Decimal value of 0X3C

Answer 25

3*16=48 12*1=12 Total is 60

Question 26

Hex value of 122 decimal

Answer 26

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

Question 27

Hex value of 350 decimel

Answer 27

350/*256 = 1 94/16 = 5 14/1=14 Answer is 0X15E

Question 28

Octal Math

Answer 28

Base 8 Used with Unix or Linux 8 bits to make a byte

Question 29

Octal conversion chart

Answer 29

512 64 8 1

Question 30

Decimal value of 27 octal

Answer 30

8*2 = 16 7*1 = 7 16 + 7 = 23

Question 31

Decimal value of 233 octal

Answer 31

64 * 2 = 128 8 * 3 = 24 1 * 3 = 3 128 + 24 + 3 = 155 Answer is 155

Question 32

Octal value of 122 decimal

Answer 32

122 / 64 = 1 r58 58 / 8 = 7 r 2 2 / 1 = 2 Answer is 172 octal

Question 33

Octal value of 200 decimal

Answer 33

200 / 64 = 192 8 / 8 = 1 0 / 1 = 0 Answer is 193 octal

Question 34

CSMA/CD

Answer 34

Carrier Sense Multiple Access / Collision Detect Half Duplex Ethernet

Question 35

CSMA/CA

Answer 35

Carrier Sense Multiple Access /Collision Avoidance Full Duplex Used for wireless uses RTS/CTS ready to send or clear to send

Question 36

TCP IP Layers

Answer 36

Application Transport Internet Link

Question 37

TCP IP Suite application layer protocols

Answer 37

``` FTP DHCP TFTP DNS HTTP TLS SSL VOIP SSH POP3 IMAPv4 NTP Telnet SMTP SNMP ```

Question 38

TCP IP transport layer protocols

Answer 38

TCP | UDP

Question 39

TCP IP internet layer protocols

Answer 39

IPv4 IPv6 ICMP IGMP

Question 40

TCP IP link layer protocols

Answer 40

ARP

Question 41

Wireless Network Standard

Answer 41

802.11

Question 42

802.11a

Answer 42

5GHZ 54 Mbit/s smaller range than 802.11b signal absorbed by surroundings No longer used

Question 43

802.11b

Answer 43

2.4 GHz 11 Mbs Better range less absorption Freq range is congested

Question 44

802.11g

Answer 44

2.4 GHz 54 MBs backwards compatible with 802.11b Freq congestion

Question 45

802.11n

Answer 45

5 or 2.4 GHz 600 MBs Uses MIMO

Question 46

802.11ac

Answer 46

5GHz Increased channel bonding Denser signal modulation 8 MIMO streams

Question 47

Security policy describes what

Answer 47

how data is secured

Question 48

Name some agreements

Answer 48

``` SLA MOU informal MOA MSA - master service agreement multiple projects SOW ```

Question 49

What's a good humidity to control ESD

Answer 49

60% but this much humidity is very uncomfortable

Question 50

What is fail open

Answer 50

all security features are opened automatically

Question 51

What is Fail close

Answer 51

all security features are activated and closed during an emergency

Question 52

name some passive cable termination

Answer 52

punch down block patch panel

Question 53

Main Distro Frame

Answer 53

Usually locatded in the data center Serves as good test point Central point of data

Question 54

IDF

Answer 54

Intermediate Distro Frame Extension of MDF Houses switches for a floor

Question 55

UPS

Answer 55

Backup power for 20 mins Good for blackouts brownouts surges

Question 56

Types of racks

Answer 56

Two post -- telecommm equipment Four Post

Question 57

how is a data center air handled

Answer 57

Hot aisle Cold aisle

Question 58

FTP

Answer 58

Port 20/21 transfer files USid and pasword

Question 59

TFTP

Answer 59

Port 69 NO authentication Very simple file transfer Not used on production networks

Question 60

SNMP

Answer 60

Port 161 Gather info about network devices SNMP v3 has integrity authentication and encryption

Question 61

Telnet

Answer 61

Port 23 Login into remote devices Clear txt passwords and usids

Question 62

SSH

Answer 62

Port 22 Like a secure version of telnet

Question 63

DNS

Answer 63

port 53 correlates ips to common names

Question 64

DHCP

Answer 64

Port 67/68 Dynamic or Static

Question 65

smb

Answer 65

Port 137/138/139 Server message block Called a common Interment File System

Question 66

RDP

Answer 66

Port 3389

Question 67

TCP

Answer 67

Connection oriented Reliable delivery Can handle out of order messages

Question 68

UDP

Answer 68

Connecitionless No formal setup or tear down Fire and forget Unreliable

Question 69

Ephemeral Port

Answer 69

Temporary ports

Question 70

Non Ephemeral Port

Answer 70

Permanent port numbers Usually on servers

Question 71

HTTP Port

Answer 71

80 443

Question 72

NetBIOS Port

Answer 72

137 138 139

Question 73

POP

Answer 73

110 For receiving client email

Question 74

IMAP

Answer 74

143 new email client protocol

Question 75

SMTP

Answer 75

25 Transfer email between email servers

Question 76

SIP

Answer 76

5060/5061 Session Intiated Protocol Voice over IP signaling

Question 77

MGCP

Answer 77

2427

Question 78

RTP

Answer 78

5004/5005

Question 79

H.323

Answer 79

1720

Question 80

Done

Answer 80

Done