7 million
Bridge operate on data link layer
2
US pennies (since 1982) have been made of zinc (97.5%) with a thin layer of copper (2.5%) outside.
Ozone layer break because of CFC's. they react with ozone and break it.
A network bridge connects multiple network segments at the data link layer (Layer 2) of the OSI model.
Layer 2 (Data Link Layer) http://compnetworking.about.com/cs/internetworking/g/bldef_bridge.htm
Baking soda reacts with the copper surface of the pennies, causing them to form a blue/greenish copper oxide layer. This chemical reaction changes the surface of the pennies, giving them a blue appearance.
The network layer address is not important to a transparent learning bridge because a transparent bridge operates at the data link layer (Layer 2) of the OSI model. It uses MAC addresses to make forwarding decisions and learn the network topology, while network layer addresses (like IP addresses) are not used in this process. Therefore, the bridge focuses solely on the MAC addresses to filter and forward traffic within the same local area network (LAN).
No. Hub works only on first layer. On second layer only swithc/bridge works on second layer of OSI model.
Post 1982 pennies in the United States are made of 97.5% zinc and coated with a thin layer of copper. Prior to 1982, pennies were made of 95% copper.
bridge is designed for use between LANs that use identical protocols for the physcial and link layer.
You will need a router. Token Ring and Ethernet refer to two different layer two protocols. You will need a layer three device to encapsulate the data for communication between the two networks. A bridge refers to a layer two device.