In classful addressing, the class of an IP address can be determined by the value in the first octet:
0 - 126 class A
128 - 191 class B
192 - 223 class C
Well, an IP address will allow you to get on the internet (Public/External IP address, eg. 203.50.6.14). A MAC Address only comes into action internally in a network, Most notably during the process of DHCP, and APR tables. A MAC address is used to identify machines based on their network cards physical address within a network, where as your Public or External IP address is used to identify you on the internet.
no ip domain-lookup
physical address
routers work at layer 3 (network) which usually means TCP/IP. Routing decisions are made based on a packets DESTINATION IP address.
172.16.0.0. The first ip address within this subnet is 172.16.0.1
The effect of not having a working IP address is that you will not be able to connect over the network. All devices that want to communicate over an Ethernet based network (LAN or WAN) needs to have an IP address.
MAC filtering
An IP address is a number that identifies your computer and the network area it is a part of. Every device directly connected to the internet has a unique address. Home and office machines typically have IP addresses that reflect the hierarchy of the network they are on. You can think of an IP address as being similar to a postal address. It describes where to send data so that it reaches it's destination.
Ethernet address is really not a good term to use. I think you mean a MAC address. A MAC address is given to any device that accesses the internet. Such devices include WiFi cards, modems, and routers. These are only used by networks that devices connect to, and not by websites. They can be used for filtering and identifying devices on a network.Ip (Internet Protocol) addresses are assigned to networks (one per network) by an ISP (Internet Service Provider) such as Comcast. These are sent to everything you interact with online, so that your network, rather than your computer, is identified.Now there are two kinds of Ip addresses: internal and external. Internal are used by your network to identify each device that connects to it. External Ip's are assigned by your ISP to identify you to the world. I explained the difference more in-depth in another answer, which is right here:What_is_the_difference_between_an_Ip_address_and_a_http_address
binary ANDing
binary ANDing
That is called an IP address, and is made up usually based off of location, and your internet service provider (ISP)IP address is the logical address which serves as Identity for the Host device on a Network.