Explain how it is possible for a sequence of packets transmitted through a wide area network to
arrive at their destination in an order that differs from that in which they were sent. Why can’t this
happen in a local network?
What will be an ideal response?
Packets transmitted through a store-and-forward network travels by a route that is determined dynamically for
each packet. Some routes will have more hops or slower switches than others. Thus packets may overtake each
other. Connection-oriented protocols such as TCP overcome this by adding sequence numbers to the packets
and re-ordering them at the receiving host.
It can’t happen in local networks because the medium provides only a single channel connecting all of
the hosts on the network. Packets are therefore transmitted and received in strict sequence.
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A) 1 B) 2 C) 3 D) 4
Globalization is
a. the creation of international computer networks. b. the process of creating a worldwide network of businesses and markets. c. the adoption of global Internet standards. d. the adoption of English as the language of business. e. the way that stock exchanges stay open 24 hours a day.