What kind of ip address is suitable to a WAN topology ?

It depends on the WAN technology.

You can have private IP address in MPLS typical /30 network.

You can have public IP address in Direct internet. You can buy /29 public IP address for your network

There are two types of IP addresses IPv4 and IPv6. It depends on you what will use (It all depends on your knowledge).

Noramlly people preffer IPv4.

If you are asking what subnet mask is suitable for a WAN topology using IPv4, then it depends on the design of your WAN.

>> Point to mutipoint topology = subnet mask will depend on the number of connections in the topology

>> point-to-point = 255.255.255.252 (30 bit mask is suitable)..

any public ip address will do

The Suitable Range of WAN Topology IP is . Provided by your Internet Service Provider. They might have a Range of Public IP's to provide their requested Clients.

an ip address is an ip address. you have two choices IPv4 and IPv6. but most companies are using IPv4.

public ip addresses

all ip address ranges are public except specific range are private

With the use of public Wi-Fi, anyone can access your mobile via hacker software

Therefore it is recommended not to enter such networks unless known source

For a WAN connection always use /30 subnet mask. The class of IP either A, B or C does not really matter.

any ip address class is suitable , what matters is the subentting always use /30 mask