Question $4(7$ marks$)$

Discuss how network protocols and standards facilitate the transfer of data in this network by

answering the following:

Assume that all the routers in the network shown in Figure Q$4$ are enabled with only Open

Shortest Path First $($OSPF$)$ routing protocol. The links are labelled with link cost between two

adjacent routers.

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$($a$)$ Copy Table Q$4($a$)$ to your answer script and use the format given in the table to

obtain the Shortest Path First $($SPF$)$ table for Router A$.$

Table O$4($a$)$

$(5$ marks$)$

$($b$)$ From the information in Q$4($a$),$ draw the Shortest Path First $($SPF$)$ Tree for

Router A$.$