Nt2460 Unit 1 Assignment
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 …show more content…
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 address spaces were originally defined in an effort to delay IPv4 address exhaustion, but they are also a feature of IPv6, the next generation Internet Protocol.
The most common use of private addresses is in residential networks, since most Internet service providers (ISPs) only allocate a single publicly routable IP address to each residential customer, but many homes have more than one computer or other Internet connected device, such as smartphones. In this situation, a network address translator (NAT/PAT) gateway is usually used to provide Internet connectivity to multiple hosts.
Private addresses are also commonly used in corporate networks, which for security reasons, are not connected directly to the Internet. Often a proxy, SOCKS gateway, or similar devices are used to provide restricted Internet access to network-internal …show more content…
If seen on the public internet, these packets cannot actually originate as claimed, or be delivered. However, certain reserved addresses can be routed using multicast, or on private networks, local links, or loopback interfaces, depending on which special-use range they fall within.
Martian packets commonly arise from IP address spoofing in denial-of-service attacks, but can also arise from network equipment malfunction or misconfiguration of a host.
The name is derived from packet from Mars, a place where packets clearly cannot originate.
Bogon filtering is the practice of filtering bogons, which are bogus IP addresses. Bogon is also an informal name for an IP packet on the public Internet that claims to be from an area of the IP address space reserved, but not yet allocated or delegated by the Internet Assigned Numbers Authority (IANA) or a delegated Regional Internet Registry (RIR). The areas of unallocated address space are called the bogon space.
References
Clarke, Glen E. (2011) CCENT Certification All-In-One For Dummies. Indianapolis, IN:
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 …show more content…
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 address spaces were originally defined in an effort to delay IPv4 address exhaustion, but they are also a feature of IPv6, the next generation Internet Protocol.
The most common use of private addresses is in residential networks, since most Internet service providers (ISPs) only allocate a single publicly routable IP address to each residential customer, but many homes have more than one computer or other Internet connected device, such as smartphones. In this situation, a network address translator (NAT/PAT) gateway is usually used to provide Internet connectivity to multiple hosts.
Private addresses are also commonly used in corporate networks, which for security reasons, are not connected directly to the Internet. Often a proxy, SOCKS gateway, or similar devices are used to provide restricted Internet access to network-internal …show more content…
If seen on the public internet, these packets cannot actually originate as claimed, or be delivered. However, certain reserved addresses can be routed using multicast, or on private networks, local links, or loopback interfaces, depending on which special-use range they fall within.
Martian packets commonly arise from IP address spoofing in denial-of-service attacks, but can also arise from network equipment malfunction or misconfiguration of a host.
The name is derived from packet from Mars, a place where packets clearly cannot originate.
Bogon filtering is the practice of filtering bogons, which are bogus IP addresses. Bogon is also an informal name for an IP packet on the public Internet that claims to be from an area of the IP address space reserved, but not yet allocated or delegated by the Internet Assigned Numbers Authority (IANA) or a delegated Regional Internet Registry (RIR). The areas of unallocated address space are called the bogon space.
References
Clarke, Glen E. (2011) CCENT Certification All-In-One For Dummies. Indianapolis, IN: