CS Unit 5 L2 MAC and IP addresses

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Multiple Choice

You are expected to get 100% on this test as all the answers are in the slides - so read them carefully or look at the lesson presentation version.

Did you open the link on the previous slide?

• Yes I understand and will achieve 100%

• No way - I want to fail

Multiple Select

When trying to find a house, what are 4 ways of identifying its location or address?

Notice that each of these different methods all find the same house, but they all have different reasons why they are used

• Postal address – house number and postcode

• GPS coordinates

• What3Words location

• Street directions

• Ask Mr H

Multiple Choice

What is the bit address size of MAC addresses, allowing for 281 trillion (248) possible devices

• 48-bit

• 24-bit

• 4-bit

• 8-bit

Multiple Choice

Which bytes of the MAC address contains a number that represents the manufacturer

• last three bytes

• first 33 bytes

• first last bytes

• first three bytes

Match

Match the following - from the example given

• The first three bytes

• last 3 bytes

manufacturer code

serial code

example of serial code

example manufacturer code

• manufacturer code

• serial code

• example of serial code

• example manufacturer code

Multiple Choice

In the previous slide, why is the number 2 to the power of 32, why is is 32?

• (IPv4) addresses are made from four bytes

• (IPv4) addresses are made from 32 bytes

• (IPv4) addresses are made from 30 bits

• (IPv4) addresses are made from 2 bytes

Multiple Choice

What is the total number of unique IP addresses that are available?

• $$2^{32}$$  = 3 billion addresses

•   $$2^{32}$$  = 4 billion addresses

• $$2^{32}$$  

  = 4.3 billion addresses

•  

  $$2^{32}$$  = 43 billion addresses

Match

Match the following

• Hex digits should be in lowercase

• Leading zeros don’t need to be written for each set of four hex digits, but keep one digit if they are all zeros

• The longest set of zeros, that is more than four hex digits, is replaced with ::

  (Except if it a single field of zeros)

58b3:dc97

Correct way

10bc:b3:0

Correct way

10bc:b3::1a7

Correct way

• 58b3:dc97

  Correct way

• 10bc:b3:0

  Correct way

• 10bc:b3::1a7

  Correct way

Match

Match the following

IPv4

Internet Protocol version 4

• Address size

• Number of unique addresses

• Separators

• Security

• Assignment of IP address

32-bit

4.3 billion

Full stops .

not as good as IPv6

DHCP server

• 32-bit

• 4.3 billion

• Full stops .

• not as good as IPv6

• DHCP server

Match

Match the following

IPv6

Internet Protocol version 6

• Address size

• Number of unique addresses

• Separators

• Security

• Assignment of IP address

128-bit

340 trillion trillion trillion

Colons :

Improved security

Pv6 devices can configure themselves automatically (Autoconfiguration) or use DHCPv6

• 128-bit

• 340 trillion trillion trillion

• Colons :

• Improved security

• Pv6 devices can configure themselves automatically (Autoconfiguration) or use DHCPv6

Multiple Choice

Unique address for each device used to route packets of data

• Manufacturer and serial code

• Dynamic and static IP addresses

• IP address

• IPv4 and IPv6

• MAC address

Multiple Choice

what is Unique identifier for each hardware device permanently put on the device by the manufacturer

• Manufacturer and serial code

• Dynamic and static IP addresses

• IP address

• IPv4 and IPv6

• MAC address

Multiple Choice

What are the 2 Standards for IP addresses, IPv4 uses 32-bit addresses whilst IPv6 uses 128-bit addresses

• Manufacturer and serial code

• Dynamic and static IP addresses

• IP address

• IPv4 and IPv6

• MAC address

Multiple Choice

IP addresses are allocated by the network/ISP and will be the same (?) each time the connection is made, or change (?) each time

which 2 words are the ? for?

• Manufacturer and serial code

• Dynamic and static IP addresses

• IP address

• IPv4 and IPv6

• MAC address

Multiple Choice

The first three bytes of the MAC address identifies the ? of the device, whilst the last three bytes identifies the particular device with the ? code.

which 2 words are the ? for

• Manufacturer and serial

• Dynamic and static IP addresses

• IP address

• IPv4 and IPv6

• MAC address