Tutorial $8$: Network Layer

Past Year Exam Questions

a$)$ Examine Figure $1-2$ and answer the following questions:

Figure $1-2$: A Network Topology

$($i$)$ Locate directly$-$connected network$($s$)$ and remote network$($s$)$ for R$2.(5$ marks$)$

$\backslash$table$[[$R$2,$Directly$-$connected network$($s$),$Remote network$($s$)],[,],[,]]$

$($ii$)$ How many networks are shown in Figure $1-2?$

$(1$ mark$)$

$($iii$)$ If PC$1$ is to communicate with PC$5,$ the data needs to go through a default gateway. Justify the validity of the statement. $(5$ marks$)$

$($iv$)$ A router examines packet header and uses the routing table to determine the destination network. How does a router handle a packet destined for a network that is not listed in the routing table?

$(4$ marks$)$