1.7 Private IPv4 Addressing Flashcards
Summarize private IPv4 addressing. (13 cards)
What is a private IPv4 address?
An IP address for private networks, not routable on the public internet.
These addresses are reserved for internal use, allowing multiple private networks to reuse the same address space.
Define:
RFC 1918
A specification defining address ranges for private IPv4 addresses.
RFC (Request for Comments) 1918 specifies address ranges reserved for private networks, not routable on the internet.
True or False:
Private IPv4 addresses can be routed on the internet.
False
Private addresses cannot be routed on the internet; only public IP addresses are routable globally.
Fill in the blank:
Private IPv4 addresses are typically used in ________ networks.
local
These addresses are used for internal communication in networks, avoiding the use of public IP addresses.
Describe the purpose of private IPv4 addresses in networking.
They enable internal communication and conserve public IP addresses.
By using private addresses internally, organizations can avoid the exhaustion of public IPv4 address space.
List the private IPv4 address ranges defined by RFC 1918.
- Class A: 10.0.0.0 – 10.255.255.255
- Class B: 172.16.0.0 – 172.31.255.255
- Class C: 192.168.0.0 – 192.168.255.255
These address ranges are used for local networks and are not routable on the global internet.
True or False:
The 192.168.0.0 to 192.168.255.255 range is used in home networks.
True
This Class C address range is widely used for small home or office networks due to its manageable size.
Which private IPv4 range is used for large networks?
10.0.0.0 – 10.255.255.255.
The Class A range provides a large address pool suitable for enterprise networks.
Fill in the blank:
The address range 172.16.0.0 to ________ is defined as private by RFC 1918.
172.31.255.255
This range is reserved for private use within Class B networks, providing a mid-sized address pool.
Why are private IPv4 addresses important for network security?
They shield internal networks from direct internet access.
Private addresses, used behind firewalls or NAT, prevent external entities from reaching internal devices. NAT allows communication with the internet while maintaining the privacy of internal addresses.
Define:
Network Address Translation
(NAT)
It translates private IP addresses into a public IP address for internet access.
Commonly used in routers, NAT allows multiple devices within a private network to share one public IP address for outbound communication.
True or False:
Private IPv4 addresses are unique across all networks.
False
Private addresses are not globally unique and can be reused in different private networks.
List the benefits of using private IPv4 addresses.
- Conserves public IPv4 addresses
- Enhances security by isolating internal devices
- Simplifies network management and segmentation
Using private addressing enables more efficient use of available public address space and better control over internal traffic.
