Unit 1 Assignment 1 NT2640
Topics: IP address / Pages: 5 (798 words) / Published: Mar 13th, 2015

Jason Simpson
NT2460 Friday 6pm
Unit 1 Assignment 1
IP Addresses Classes and Special-Use IP Address Space
Class A Addresses
Feature
Value
First octet range
1 to 127
Default subnet mask
255.0.0.0
IP address breakdown
n.h.h.h*
Number of class A networks
126
Number of hosts per network
16,777,214 (224 – 2)
*n = network, h = host

Class B Addresses
Feature
Value
First octet range
128 to 191
Default subnet mask
255.255.0.0
IP address breakdown
n.n.h.h*
Number of class A networks
16,384
Number of hosts per network
65,534 (216 – 2)
*n = network, h = host

Class C Addresses
Feature
Value
First octet range
192 to 223
Default subnet mask
255.255.255.0
IP address breakdown
n.n.n.h*
Number of class A networks
2,097,152
Number of hosts per network
254 (28 – 2)
*n = network, h = host

Class D Addresses
Feature
Value
First octet range
224 to 239
Default subnet mask
*Reserved for multicasting*
IP address breakdown
*Reserved for multicasting*
Number of class A networks
*Reserved for multicasting*
Number of hosts per network
*Reserved for multicasting*

RFC 1918 IP address ranges
RFC1918 name
IP address range number of addresses largest CIDR block (subnet mask) host id size mask bits classful description
24-bit block
10.0.0.0 - 10.255.255.255
16,777,216
10.0.0.0/8 (255.0.0.0)
24 bits
8 bits single class A network
20-bit block
172.16.0.0 - 172.31.255.255
1,048,576
172.16.0.0/12 (255.240.0.0)
20 bits
12 bits
16 contiguous class B networks
16-bit block
192.168.0.0 - 192.168.255.255
65,536
192.168.0.0/16 (255.255.0.0)
16 bits
16 bits
256 contiguous class C networks

In the Internet addressing architecture, a private network is a network that uses private IP address space, following the standards set by RFC 1918 for Internet Protocol Version 4 (IPv4). These addresses are commonly used for home, office, and enterprise local area networks (LANs), when globally routable addresses are not mandatory, or are not available for the intended network applications. Under IPv4, the private IP



References: Clarke, Glen E. (2011) CCENT Certification All-In-One For Dummies. Indianapolis, IN: Wiley Publishing, Inc., Chapter 4: Introduction to TCP/IP, pg. 85-89 Private Networks. (2014, Dec 3). In Wikipedia. Retrieved from http://en.wikipedia.org/wiki/Private_network Martian packet. (2014, Dec 15). In Wikipedia. Retrieved from http://en.wikipedia.org/wiki/Martian_packet

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