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StormWindsStudio ICND1 > Sesson 2 > Flashcards

Sesson 2 Flashcards

ICDN1

1
Q

what tells you that you are in User exec mode on the CLI

A

the > sign

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2
Q

what tells you that you are in Privledge exec mode on the CLI

A

the # sign

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3
Q

what is the purpose of the CPU in a switch/router?

A

Process any commands and other decision .

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4
Q

what is the purpose of the Flash in a switch/router?

A

our operating system is stored. It is not run here just stored.

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5
Q

what is the purpose of the NVRAM in a switch/router?

A

Startup configuration is stored here. The configs when the device loads/boots it does from here.

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6
Q

what is the purpose of the RAM in a switch/router?

A

our operating system is run here.

Running config is also know as RAM

Examples:
Show flash:
Show bootflash

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7
Q

what is the purpose of the Boot Rom in a switch/router?

A

contains your boot strap code. POST. All low level config stuff to get the device up.

ROM-MON mode - basically the E.R of the product.

Password resetting is done here.

You need to do a break sequence to get into ROM-MON mode.

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8
Q

what command will you use to show what actual versio of IOS is loaded on a switch?

A

Show version

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9
Q

What do you need to know about the copy command?

A

copy SOURCE to DESTINATION

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10
Q

what happens when you copy from NVRAM (startup config) to RAM (running-config)

A

You will merge the two together. So what ever is currently present in running config will be present afterward.

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11
Q

What happens when you copy from run to start or to flash

A

you override what is there.

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12
Q

what does Control-shift-6 does?

A

allows to abort an IOS process

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13
Q

what does control-c do

A

aborts current command and exit config mode.

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14
Q

how to change the history size from 10 to 50

A

Switch#terminal history size 50

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15
Q

what does the DO command mean?

A

allows you to show command where I am typically not suppose to use it.

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16
Q

what command will allow set the length to max?

A

show terminal length 0

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17
Q

What is a Broadcast?

What is a broadcast domain

A

can be a packet/frame that is destined to everyone within a broadcast domain (within a vlan).

broadcast domain is separated by a layer 3 (router)

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18
Q

What is a Collision?

What is a collision domain?

A

when 2 or more devices talking at the same time

A collision domain is a network segment connected by a shared medium or through repeaters (hub) where simultaneous data transmissions collide with one another.

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19
Q

Is it good to have more or less collision domain?

Give me an example?

A

MORE.

example 1 daycare 100 kids. what is the chances that 2 kids will hit each other.

best thing is to have 100 kids in 100 rooms = no collisions.

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20
Q

What is an example of a Unicast?

A

1 to 1

You know the MAC of the destination device.

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21
Q

What is an example of a broadcast?

A

1 to everyone…

ffff-ffff-ffff

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22
Q

what is an example of a Multicast?

A

1 to a group

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23
Q

how do you get the destination mac address of a frame if you dont know it?

A

ARP

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24
Q

what is the MAC address table on the switch?

A

is the forwarding table that will grab the source MAC of the device connected to a interface.

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25
Q

how long does a mac address stay in the mac table?

A

by default 300 seconds or 5 mins. It resets as long as the device talks.

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26
Q

If a switch does not know the MAC address on its mac address table, what does the switch do with an unknowing unicast frame?

A

It FLOODS it to all ports except the port it came in.

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27
Q

f a switch does not know the MAC address on its mac address table, what does the switch do with an knowing unicast frame?

A

It forwards it to the interface since it knows where to send it.

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28
Q

All broadcast frames are what in a switch?

A

Flooded

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29
Q

what are the 4 steps of DHCP?

A

Discover
Offer
Request
Acknowledge

30
Q

what part of the DHCP process uses broadcast?

A

Discover message

The discover message will be broadcast

but then it will be unicast going back to the original source.

31
Q

what happens in a multicast frame

A

if the switch is configured to participate in multicast, then it will learn the ports that have members of the group….

if its not configured to to participate for multicast, the it will be flooded.

32
Q

What is IGMP?

A

Internet grouping message protocol. used for multicast frames.

ex IP tv

33
Q

What are the details of Half-duplex?

Give me an example that uses half duplex

A

Unidirectional data flow
Legacy connectivity
Higher potential for collision?

ex: Walkie talkie

34
Q

whats is CSMA/CD typically used on

A

half duplex

35
Q

what does CSMA/CD stand for?

A

carrier sense multi access collision domain.

36
Q

what are the details of full deplex?

A

allows for transmit and receive
both ends must be full duplex
does not suffer from collisions

37
Q

CSMA/CD is used in compare to CSMA/CA

A

CD - LAN

CA - carrier avoidance = WIRELESS

38
Q

how should you set up the uplinks for infrastructure link?

Switch to Switch

compare to switch to end device

A

Switch to switch = duplex full

Switch to end = auto

39
Q

will you have connectivity on a speed mismatch?

mismatched duplex means?

A

NO connectivity

half duplex will mean slow connectivity.

40
Q

what does Late collision mean in the interface?

A

you have a duplex mismatch and this is usually the half collision side.

41
Q

if the interface gets a CRC errors ?

A

cycle redundancy check errors. the switch is checking the FCS

the full frame does not receive the full frame since the other side is set to half and it does not send the entire frame since it suffering from collisions.

42
Q

what are some copper media issues?

A

EMI sources may be introduced
cable length too long
wiring can be damaged

43
Q

what are some fiber media issues?

A

Splice losses

Bending the fiber in too small a radius light escape

44
Q

Troubleshoot Interface status and Line Protocol?

  1. Up/Up
  2. Up/Down
  3. Down/Down (not connected)
  4. Down/Down
  5. Administratively down/down
A
  1. Operational
  2. Connections Problem
  3. Cable unplugged; other end of the line disconnected or interface in shutdown mode
  4. Interface problem
  5. disabled
45
Q

Line protocol is used in what layer?

A

Layer 2

are you speaking the same language.

46
Q

IP address works in which layer?

A

Layer 3 or Network Layer.

47
Q

what uniquely identifies you in the world?

A

IP address

48
Q

What are the Private IP address list IPv4?

What is another name for the Private IP address range?

A

Class A - 10.0.0.0 to 10.255.255.255

Class B - 172.16.0.0 to 172.31.255.255

Class C - 192.168.0.0 192.168.255.255

RFC1918

49
Q

What are the Public IP addresses ranges for IPv4

A
  1. 0.0.0 to 9.255.255.255
  2. 0.0.0 to 126.255.255.255
  3. 0.0.0 to 172.15.255.255
  4. 32.0.0 to 191.255.255.255
  5. 0.0.0 to 192.167.255.255
  6. 169.0.0 to 223.255.255.255
50
Q

What are the Public IP addresses ranges for IPv4 for class A

A
  1. 0.0.0 to 9.255.255.255

11. 0.0.0 to 126.255.255.255

51
Q

What are the Public IP addresses ranges for IPv4 for class B?

A
  1. 0.0.0 to 172.15.255.255

172. 32.0.0 to 191.255.255.255

52
Q

What are the Public IP addresses ranges for IPv4 for class C?

A
  1. 0.0.0 to 192.167.255.255

192. 169.0.0 to 223.255.255.255

53
Q

What are the 2 parts of IPv4 address?

A

Network and Host

ex. Street and address.

54
Q

What is a Subnet Mask?

A

what distinguishes the network portion from the host portion.

55
Q

how many bits are in a IP address?

A

32 bits

56
Q

Class A has what bit fixed and what is the range?

A

0xxxxxx = first bit is always 0

range = 0 -127

57
Q

Class B has what bit fixed and what is the range?

A

10xxxxxx = first 2 bits is 10 in binary

128-191

58
Q

Class C has what bit fixed and what is the range?

A

110xxxxx = first 3 bits are 110 in binary

192 - 223

59
Q

Type of class address questions do not care of what?

A

Subnet mask

60
Q

What is 2^0 = ?

A

1

61
Q

What is 2^1 = ?

A

2

62
Q

What is 2^2 =?

A

4

63
Q

What is 2^3 =?

A

8

64
Q

What is 2^4 =?

A

16

65
Q

What is 2^5 =?

A

32

66
Q

What is 2^6 =?

A

64

67
Q

What is 2^7 =?

A

128

68
Q

How can you find how many subnets (block sizes)?

A
  1. Located the last ONE in the new subnet mask.
  2. Determine what the decimal value is of that position? = Magic number
  3. Identify the octet this last one is in.
  4. use the value step 2 and 3 to determine your subnets
69
Q

What is the equation to find how many subnets you have?

A

2^S

S=bits borrowed from the host portion

70
Q

what is the equation to find how many host you have

A

2^h-2

H = how many bits you have left over - 2.

StormWindsStudio ICND1 (10 decks)

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