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Is public IP and private IP same?
Private IP address of a system is the IP address which is used to communicate within the same network. Public IP address of a system is the IP address which is used to communicate outside the network. Public IP address is basically assigned by the ISP (Internet Service Provider).
Can I have 2 public IP addresses?
Multi-NAT can be used where you have been allocated multiple public IP addresses by your ISP. Instead of a many-to-one relationship, you can have a one-to-one relationship between a public IP address and an internal/private IP address.
How is an OSPF network divided into sub-domains?
An OSPF network can be divided into sub-domains called areas. A router within an area must maintain a topological database for the area to which it belongs. Since the router will not have detailed topology information of routers in other areas, this would greatly reduce the size of database. Areas limit the scope of route information distribution.
What is the purpose of OSPF in multiarea?
OSPF uses areas to simplify administration and optimize traffic and resource utilization. An area is simply a logical grouping of contiguous networks and routers. All routers in the same area have the same topology table and don’t know about routers in the other areas.
What do area IDs mean in OSPF network?
OSPF areas explained. Each area in an OSPF network must be connected to the backbone area (also known as area 0). All routers inside an area must have the same area ID in order to become OSPF neighbors. A router that has interfaces in more than one area (area 0 and area 1, for example) is known as an Area Border Router (ABR).
What are the different administrative distances in OSPF?
OSPF uses three different administrative distances: intra-area, interarea, and external. Routes within an area are intra-area; routes to another area are interarea; and routes from another routing domain learned via redistribution are external. The default distance for each type of route is 110.