IP Addresses Flashcards
What is Class A
First Octet: 0-127
Default Subnet Mask: 255.0.0.0
16 million possible IP addresses
What is Class B
First Octet: 128-191
Default Subnet Mask: 255.0.0.0
65,536 possible IP addresses
What is Class C
First Octet IP: 192-223
Default Subnet Mask: 255.255.255.0
256 possible IP addresses
What is Class D
First Octet IP: 224-239
No default subnet mask
Reserved only for multicasting or multi-casting routing
What is the power of 2 converting in decimal numbers for IP addresses?
Hint: Draw table from left to right starting with the lowest digit value.
2^7 = 128
2^6 = 64
2^5 = 32
2^4 = 16
2^3 = 8
2^2 = 4
2^1 = 2
2^0 = 1
What address is a Loopback
- Use 127.0.0.1 for loopback
- Default Subnet: 255.0.0.0
What are private IP addresses of RFC 1918?
10.0.0.0 - 10.255.255.255
172.16.0.0 - 172.31.255.255
192.168.0.0 - 192.168.255.255
How may bits is IPv4 and IPv6?
32 bits / 128 bits
What address is Automatic Private IP Addresses (APIPA)?
169.254.0.0 - 169.254.255.255
Default subnet: 255.255.0.0
What is the subnetting chart? Hint:
CIDR - Subnets - Available IP addresses
CIDR #Subnets #IPs
/24 1 256
/25 2 128
/26 4 64
/27 8 32
/28 16 16
/29 32 8
/30 64 4
What is classful network for subnet mask?
Hint: Define subnet mask for class A, class B, class C with their CIDR
Class A: 255.0.0.0 - CIDR /8
Class B: 255.255.0.0 - CIDR /16
Class C: 255.255.255.0 - CIDR /24
What is default subnet for classless CIDR table?
Hint: CIDR class + subnet network mask
/25 - 255.255.255.128
/26 - 255.255.255.192
/27 - 255.255.255.224
/28 - 255.255.255.240
/29 - 255.255.255.248
/30 - 255.255.255.252
What is Class E?
- First Octet: 240-255
- No default subnet mask
-Reserved for experimental use in terms of research and development
What is CIDR?
Classless Inter-Domain Routing
What is NAT?
- Network Address Translation
- Translate private IP addresses to public IP addresses
