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Media,Ports & Protocols > IP Addressing > Flashcards

IP Addressing Flashcards

Learn IP addressing

1
Q

what is the Class A IP range?

A

1-126

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2
Q

What is the Class B IP range?

A

128-191

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3
Q

What is the Class C network range?

A

192-223

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4
Q

What is the Class A private range?

A

10.0.0.0 - 10.255.255.255

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5
Q

Name the Class B private range

A

172.16.0.0 - 172.31.255.255

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6
Q

Name the Class C private range

A

192.168.0.0 - 192.168.255.255

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7
Q

What is the APIPA valid host range?

A

169.254.0.1 - 169.254.255.254

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8
Q

What does a host address of all 0’s mean?

A

designates the network, or any host on that network

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9
Q

what does a host address of all 1’s mean?

A

designates all hosts on a network

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10
Q

network address of all 0’s means?

A

this network

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11
Q

network address of all 1’s means?

A

all networks

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12
Q

entire IP address set to 0’s means what?

A

used by cisco routers to designate default route

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13
Q

ip address of all 1’s is reserved for what?

A

to broadcast to all hosts on the current network

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14
Q

easiest way to find out the valid hosts on a network?

A

1) turn all the host bits off; that gives the network address
2) turn all the host bits on; that gives the broadcast address.
3) the valid hosts sit between the network address and broadcast address

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15
Q

Class A address always has the first bit set to what?

A

zero

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16
Q

Class B network address always starts with what?

A

10

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17
Q

What address range starts with 11 as the first two bits?

A

Class C

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18
Q

Multicast address use what IP address range?

A

224-239

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19
Q

Name 2 features of multicasting

A

1) packets are sent only to subscribed hosts

2) routers will forward multicast packets

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20
Q

You want a public facing IPv6 interface, what kind of address do you use?

A

Global Unicast Address

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21
Q

What is the IPv6 equivalent of a private IPv4 address range?

A

Unique Local Address

22
Q

You want to quickly set up a local IPv6 network to share resources between a few computers, what addresses type would you give them?

A

Link-local addresses

23
Q

What IPv6 address type is known as one to nearest addressing?

A

Anycast

24
Q

How long is an IPv6 address?

Name the 2 sections that typically make up an IPv6 address?

A

1) Global Prefix and Subnet (64-bit)

2) Interface ID (64-bit)

25
Q

You have old legacy infrastructure and can’t afford to upgrade everything to IPv6. What strategy could you employ to allow IPv4 devices make use of IPv6?

A

Dual Stacking

26
Q

You need your IPv6 network to communicate with another IPv6 network over an IPv4 network. How do you do this?

A

6to4 tunnelling

27
Q

When would you use Teredo?

A

If you had get IPv6 packets over an IPv4 network that has NAT

28
Q

What is the link-local unicast IPv6 range?

A

FE80::/10

29
Q

What is the IPv6 multicast range?

A

FF00::/8

30
Q

What is the IPv6 global unicast address range allocated for internet access?

A

2000:/3

31
Q

What address range is used for 6to4 tunnellings?

A

2002::/2

32
Q

What address range is this, FE80::/10?

A

Link-local unicast

33
Q

What address range is this, FF00::/8?

A

IPv6 multicast

34
Q

Name this address range, 2002::/2?

A

IPv6 6to4 tunelling range

35
Q

Name this address range 2000:/3

A

IPv6 Global unicast range

36
Q

What type of IPv6 address is equivalent to an APIPA address in its function and cannot be routed AT ALL?

A

link-local address

37
Q

What is Miredo?

A

tunnelling technique used on native IPv6 Linux and BSD machines to communicate on the IPv4 internet directly without needing a dual stack router

38
Q

APIPA address lie in what Class range?

A

Class B

39
Q

What class of addresses use the range 224-229?

A

Class D, multicast

40
Q

What address range is for scientific purposes only and not a valid host address?

A

240-255

41
Q

in an IPv6 address, a double colon can only be used once to represent a block of all zeros. TRUE or FALSE?

A

TRUE

42
Q

Stateless auto-configuration allows devices on a network to what?

A

to address themselves with a link-local or global unicast address.

43
Q

What 16-bit hex value is inserted into a MAC address to create an EUI-64 address? After which bit, counting from the left, is it inserted?

A

FF:FE

Bit 24 or a block and a half in from the left

44
Q

which bit should be flipped when converting a 48-bit MAC address to a 64-bit EUI?

A

The 7th bit.

45
Q

List (8) in order the subnet mask decimal values e.g.
10000000 =
11000000 =

A 
128
192
224
240
248
252
254
255
46
Q

What is the minimum number of bits required for the host portion of an address?

A

2

47
Q 
List how many valid hosts can be obtain for each borrowed bit in the pattern below:
1-bit
2-bits
3-bits
4-bits
5-bits
6-bits
7-bits
8-bits
A 
1-bit - invalid
2-bits - 2 (calc = 2*2-2)
3-bits - 6 (calc = 2*2*2-2) etc
4-bits - 14
5-bits - 30
6-bits - 62
7-bits - 126
8-bits - 254
48
Q

What is the calculation to work out the valid subnets/block size?

A

subtract the subnet mask from 256 e.g. if a subnet has 4 borrowed bits then it would be 256-240=16

49
Q

What is Static NAT?

A

A type of network address translation that allows one-to-one mapping between local and global addresses. You’ll need one real internet address for each host on the network.

50
Q

Which type of NAT is also known as Port Address Translation? How does it work?

A

NAT Overload. It works by allowing multiple private IP addresses to use just a single public IP by using source and destination ports to forward data from the internet to host machines

Media,Ports & Protocols (5 decks)

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