Topic #14: IPv4 (2) Flashcards
These are addresses used in networks that require limited or no Internet access
Private Addresses
These are required in order to allow Internet Access to private addresses
NAT (Network Address Translation)
These are the addresses designed to have access on the Internet and carry the user wherever they want to go
Public Addresses
These are addresses that will be forwarded by a router and most can’t be assigned to a device
Special IP Address
List of Special IP Addresses
Network Address
Broadcast Address
Default Route
Loopback Addresses
Link-Local Addresses
Test-Net Addresses
this is a special address that refers to the first address of any network
Network Address
this is a special address that refers to the last address of any network
Broadcast Address
this is a special address that refers to the address when a specific route is not available
Default Route.
this is a special address that is used to test the configuration of TCP/IP on the local host
Loopback Addresses (124.0.0.0 /8)
this is a special address that can be automatically assigned to the local host by the OS in environments where no IP configuration is available
Link-Local Addresses (169.254.0.0 /16)
this is a special address that is set aside for teaching and learning purposes
Test-Net Addresses (192.0.2.0 /24)
Number of possible networks and hosts in Class A
2^7 nets with 2^24-2 hosts per net (around 16 Million host addresses per network)
Number of possible networks and hosts in Class B
2^14 nets with 2^16-2 hosts per net (around 65, 000 hosts per network)
Number of possible networks and hosts in Class C
2^21 nets with 2^8-2 per net (around 254 hosts per network)
Limitation of Classful Addressing
*not all organizations addressing requirements fit well into one of the three classes
*wasted address space
the system of addressing currently in use
classless addressing
Why must one plan an addressing scheme
*prevention of duplication
*providing and controlling access
*monitoring security and performance
Types of Hosts
End Devices
Servers and Peripherals
Hosts accessible in the Internet
Intermediary Devices
Addressing wherein the network aadministrator is the one that manually configures the network information for a host
Static Addressing
In Static Addressing, what needs to be included
- host IP address
- subnet mask
- default gateway
these are a block of addresses where in the DHCP server defines in order to be assigned to the DHCP clients on a network
Address Pool
On Addressing Servers and Peripherals
- must be static
- use consistent numbering system for such devices
On Addressing Hosts that are accessible from the Internet
- these are usually servers so they must be static
- must have a public space address associated
- numbered using private addresses
- router and firewall must be configured in order to translate the internal address of the network into a public address
On Addressing Intermediary Devices
- must be layer 3 addresses
- don’t necessarily need IPv4 to operate but need one in order to access for troubleshooting
- must be predictable -assigned manually
- must be different range from the network block
