routers move data from one network to another network. For it to do so, it needs an IP address in both networks.
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Your Router is assigned an IP address that is known as a public IP address then your router assigns out IP addresses that are known as local IP addresses. So the answer is yes and yes!
They are normally the IP addresses which your computer uses to talk to your internet router/modem. They are not the same as the IP address that your router is known by on the broadband link.
"show interfaces" "show ip interface brief"
nat
the router is assigned an ip address.
It depends on how many interfaces of router are connected to other networks. If a router is connected to two network, it will have 2 IP addresses. In a router having 4 ports it can connect to maximum 4 networks. In this case it will have 4 IP addresses.
Your Router is assigned an IP address that is known as a public IP address then your router assigns out IP addresses that are known as local IP addresses. So the answer is yes and yes!
They are normally the IP addresses which your computer uses to talk to your internet router/modem. They are not the same as the IP address that your router is known by on the broadband link.
By using a router with DHCP turned on in the router
IP addresses are normally assigned dynamically by the router.
"show interfaces" "show ip interface brief"
The Router only has one M.A.C Address and One IP Address But, the Router can have many Connections ( Devices using the network ) That may shoe up as their IP Addresses. But the Router only Has One IP Address
Since Facebook uses a limited range of IP addresses, blocking those addresses on the router will effectively deny access to Facebook.
do you have access to your router/firewall? if so, the easiest way would be to login into the router/firewall box and check for the WAN/public IP addresses for both channels.
PAT
router
Read the section of the manual concerning enabling the router to be a DHCP server. DHCP is the magic that assigns IP numbers.