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Define broadcast domain.
It is a logical area in a computer network where any computer connected to the
network can directly transmit to any other computer in the domain without
having to go through a routing device.
Bridge vs switch.
A bridge connects two different LAN networks. A switch is something like you can
connect many computers to a switch and then one computer can connect to another
through the switch. Switch is a unicast one to one connection
What is a Router?
A router is a device or sometimes a software in a computer which decides the
next network point to which a packet should be forwarded to reach its
destination on Internet. It is usually included as part of the network switch
and is located at a gateway, including each point-of-presence on the Internet.
The router is connected to at least two networks and determines which way to
send each information packet based on its understanding of the state of the
networks it is connected to.
Define gateway.
A gateway is a network point that provides entrance into another network. On the
Internet, a node or stopping point can be either a gateway node or a host
(end-point) node. Both the computers of Internet users and the computers that
serve pages to users are host nodes. The computers that control traffic within
your company's network or at your local Internet service provider (ISP) are
gateway nodes.
What is firewall?
A firewall is a hardware or software installed to provide security to the
private networks connected to the internet. They can be implemented in both
hardware and software, or a combination of both. All data entering or leaving
the Intranet passes through the firewall which allows only the data meeting the
administrators’ rules to pass through it.
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