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SAQ 6

1

Hardware

What piece of hardware uses the IP address to determine the path to forward a data packet to its destination.

a)
b)
c)
d)
Please select an answerIncorrect. A bridge is used to connect two networks together and works at the data link layerIncorrect. A Gateway is a network point that acts as an interface to another network (often the Internet). It might well contain a router which is the device being looked for here.Correct. A router uses the IP address to determine the path to forward a data packet to its destination.Incorrect. A network switch is used to connect network segments together- in theory it uses the physical MAC address to route messages. Many "switches" now contain routers and hence the answer could be yes!
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2

Transport Layer Protocols

What transport layer protocol is used by services that do not need "error free" communication such as voice over IP.

a)
b)
c)
d)
Please select an answerIncorrect. IP - Internet Protocol works at the Network layer and passes messages down to the transport layer protocolsIncorrect. FTP - File transfer protocol is an application layer protocol used for transferring filesIncorrect. TCP - Transmission Control Protocol - the most commonly used transport layer protocol that supports reliable "error free" data communication by including error checking

Correct. UDP - User Datagram Protocol - a simpler and faster transport layer protocol than TCP - often used for used by services that do not need "error free" communication such as voice over IP.

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Next: Internet Technology Summary