Bits & Bytes: Week 2, II - Subnets

Question 1

the process of taking a large network and splitting it up into many individual, smaller subnetworks or subnets

Answer 1

Subnetting

Question 2

Term for smaller networks that are part of a split up larger network

Answer 2

Subnet

Question 3

2^8 = 256

Answer 3

8 bit number (base 2 to the 8)

Question 4

2^4 = 16

Answer 4

4 bit number (base 2 to the 4)

Question 5

2^16 = 65,536

Answer 5

16 bit number (base 2 to the 16)

Question 6

a way for a computer to use AND operators to determine if an IP address exists on the same network

Answer 6

Subnet Mask (in relation to AND operators)

Question 7

ACRONYM:

CIDR

Answer 7

Classless Inter-Domain Routing

Question 8

In binary, the subnet mask represents the network ID using what digit?

Answer 8

1

Question 9

In binary, the subnet mask represents the host ID using what digit?

Answer 9

0

Question 10

What does an octet look like in binary?

Answer 10

An 8 digit long string of ones and zeros

Question 11

For the following binary IP address and its corresponding network mask, what is the network ID? Why?

IP: 00001000 . 00010100 . 00001111 . 00000001
Mask: 11111111 . 00000000 . 00000000 . 00000000

Answer 11

00001000, or 8. The corresponding numbers in the network mask are ones which means they identify the IP’s network ID.

Question 12

Are device A and Device B on the same subnet?

DeviceA: 172.16.17.30/20
DeviceB: 172.16.28.15/20

Answer 12

Yes; their IP addresses share the same first 20 digits.
A: [10101100.00010000.0001]0000.00011110
B: [10101100.00010000.0001]1000.00001111

Question 13

What is the following binary subnet mask in CIDR notation? In decimal notation?
11111111.11111111.11111100.00000000

Answer 13

/22; 255.255.252.0