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Network+ > Section 1.4 > Flashcards

Section 1.4 Flashcards

1
Q

What is a byte?

A

A byte is made from 8 bits

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2
Q

Provide the binary to decimal conversion table for 00000000

A

128, 64, 32, 16, 8, 4, 2, 1

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3
Q

What is 10001000 in decimal?

A

136 decimal

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4
Q

Provide the range for Class A IP Addresses

A

Class A range is 0-127
Easy way to remember, class A will always have a leading 0 so
0xxxxxxx , meaning the max number can be 127 in decimal

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4
Q

What defines the class in an IP address?

A

The first 3 numbers in the IP address or the leading bits.

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4
Q

What is another name for Byte?

A

Octet

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5
Q

What is DHCP?

A

Dynamic Host Configuration Protocol which provides automatic address and ip configurations such as IP address, subnet mask, gateway, dns server, ntp server.

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5
Q

What is the maximum value of an octet?

A

255 (128+64+32+16+8+4+2+1)

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6
Q

What is APIPA?

A

Automatic Private IP Addressing. It can only communicate to addresses within the local subnet and it cannot be routed to addresses outside of the local subnet

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7
Q

Provide the range for Class B IP Addresses

A

Class B range is 128-191
Easy way to remember, class b will always end with 10 so
10xxxxxx meaning the minimum is 128 if 10000000 and maximum is 191 if 10111111.

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8
Q

Provide the range for Class C IP Addresses

A

Class C range is 192-223
Easy way to remember, class C will always end with 110 so
110xxxxx meaning the minimum is 192 if 11000000 and maximum is 223 if 11011111.

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9
Q

Provide the range for Class D IP Addresses

A

Class D range is 224-239
Easy way to remember, class D will always end with 1110 so
1110xxxx meaning the minimum is 192 if 11100000 and maximum is 223 if 11101111.

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10
Q

Provide the range for Class E IP Addresses

A

Class E range is 240-255
Easy way to remember, class E will always end with 1111 so
1111xxxx meaning the minimum is 192 if 11000000 and maximum is 223 if 11111111.

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11
Q

What is the default subnet mask for Class A IP addresses?

A

255.0.0.0

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11
Q

What is the default subnet mask for Class B IP addresses?

A

255.255.0.0

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12
Q

What is the default subnet mask for Class C IP Addresses?

A

255.255.255.0

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13
Q

What are 4 important values when it comes to creating a subnet?

A

Network address - The first IP of a subnet (set all bits to 0 so 0)
Mask
First usable address - One number higher than the network address
Network Broadcast Address - The last IP Address. (set all bits to 1 so 255)
Last usable address - One number less than the network address

14
Q

What does CIDR stand for?

A

Classless Inter Domain Routing

15
Q

Provide /8 , / 16 , /24 in decimal and binary

A

255.0.0.0 = /8 = 11111111.00000000.00000000.00000000
255.255.0.0 = /16 = 11111111.11111111.00000000.00000000
255.255.255.0 = /24 = 11111111.11111111.11111111.00000000

16
Q

Provide /12 in decimal and binary

A

11111111.11110000.00000000.00000000 = 255.240.0.0

17
Q

What is the formula to calculate the number of subnets?

A

2^subnet bits

18
Q

Define Unicast network communication

A

One systems sending information to another systems.
Information is sent between two systems.

18
Q

Find the number of subnets and hosts per subnet for the following ip address 192.168.11.0/26

A

192 makes this a class C address
This means there are 2 subnets
- Class C has 24 bits - /26 that leaves us with 2 subnets bits
Total number of subnets = 2^2 = 4
Host bits = 32 (total bits) - 26 = 6. based on formula 2^6 -2 = 64 - 2 = 62

19
Q

What is the formula to calculate the number of hosts per subnet?

A

2^host bits - 2

20
Q

Provide 7 seconds subnetting process

A
  1. Convert IP address and subnet mask to decimal using the chart
  2. Determine network address (first address (all 0s or check multiple of address (lower end . upper end)))
  3. Determine the broadcast address (last address (all 1s))
  4. Determine the first usable address (network address + 1)
  5. Determine the last usable address (broadcast address -1)
21
Q

Define Broadcast network communication

A

One packet is received by everyone at once

22
Q

Define Multicast network communication

A

One to many. Delivery of information to interested systems

23
Q

Define Anycast network communication

A

One to One of Many communication

24
Q

Provide Class A Private IPv4 Address Ranges

A

10.0.0.0 - 10.255.255.255

24
Q

How many bits in IPv6 vs IPv4

A

IPv4 has 32 bits
IPv6 has 128 bits

25
Q

Provide Class C Private IPv4 Address Ranges

A

192.168.0.0 - 192.168.255.255

26
Q

Provide Class B Private IPv4 Address Ranges

A

172.16.0.0 - 172.31.255.255

27
Q

What is the Default Gateway?

A

The default gateway is the Internet Protocol (IP) address of a router on the same IP network as the host.

28
Q

What is a Subnet mask?

A

A subnet mask is used to distinguish between the network ID and the host ID within a single IP address?

29
Q

What is the purpose of VLSM (Variable Length Subnet Masks)?

A

It allows a network designer to allocate ranges of IP addresses to subnets that match the predicted need for number of subnets and hosts per subnet.

29
Q

What is the loopback address?

A

The loopback address is the address to itself which ranges from 127.0.0.1 to 127.255.255.254

29
Q

What is the Demilitarized Zone (DMZ)?

A

A parameter network which makes it so traffic cannot pass through it directly. If communication is required between hosts on either side of the DMZ, a bastion host will take the request and check it.

30
Q
A
30
Q

What is SLAAC?

A

Stateless Address Auto-configuration is an automatic address configuration for IPv6 addresses.

31
Q
A
31
Q
A

Network+ (3 decks)

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