Step $1$: Download the pure$-$text ns$-3$ trace file Assignment$-1($TR $42$ KB$)$ Download Assignment$-1($TR $42$ KB$).$ This file is a result of an ns$-3$ simulation study of a network of four nodes: n$0,$ n$1,$ n$2,$ and n$3.$ Part of this tr$\text{'}$s file screenshot is below:File Edit View

$0\mathrm{.}002928/$NodeList$/1/$DeviceList$/1/$$ns$3$::PointToPointNetDevice$/$TxQueue$/$Enqueue ns$3$::PppHeader $($Point$-$to$-$Point Protocol: IP $(0$x$0021))$ ns$3$::Ipv$4$Header $($tos $0$x$0$ DScP Default

r $0\mathrm{.}003856/$NodeList$/1/$DeviceList$/0/$$ns$3$::PointToPointNetDevice$/$MacRx ns$3$::PppHeader $($Point$-$to$-$Point Protocol: IP $(0$x$0021))$ ns$3$::Ipv$4$Header $($tos $0$x$0$ DSCP Default ECN Not$-$ECT ttl $64$ id $0$ protocol $6$ offs

$56192\mathrm{.}168\mathrm{.}1\mathrm{.}1>192\mathrm{.}168\mathrm{.}3\mathrm{.}2)$ ns$3$::TcpHeader $(49154>9[$SYN$]$ Seq$=0$ Ack$=0$ Win$=65535$ ns$3$::TcpOptionTS$(0$;$0)$ ns$3$::TcpOptionWinScale$(2)$ ns$3$::Tcp$0$ptionSackPermitted$([$sack$\_$perm$])$ ns$3$::TcpOptionEnd$($EOL$))$

$0\mathrm{.}003856/$NodeList$/1/$DeviceList$/2/$$ns$3$::PointToPointNetDevice$/$TxQueue$/$Enqueue ns$3$::PppHeader $($Point$-$to$-$Point Protocol: IP $(0$x$0021))$ ns$3$::Ipv$4$Header $($tos $0$x$0$ DSCP Default ECN Not$-$ECT ttl $63$ id

r $0\mathrm{.}005856/$NodeList$/2/$DeviceList$/0/$$ns$3$::PointToPointNetDevice$/$MacRx ns$3$::PppHeader $($Point$-$to$-$Point Protocol: IP $(0$x$0021))$ ns$3$::Ipv$4$Header $($tos $0$x$0$ DSCP Default ECN Not$-$ECT ttl $63$ id $0$ protocol $6$ offs

$56192\mathrm{.}168\mathrm{.}1\mathrm{.}1>192\mathrm{.}168\mathrm{.}2\mathrm{.}2)$ ns$3$::TcpHeader $(49153>9[$SYN$]$ Seq$=0$ Ack$=0$ Win$=65535$ ns$3$::TcpOptionTS$(0$;$0)$ ns$3$::TcpOptionWinScale$(2)$ ns$3$::TcpOptionSackPermitted$([$sack$\_$perm$])$ ns$3$::TcpOptionEnd$($EOL$))$

$0\mathrm{.}006784/$NodeList$/3/$DeviceList$/0/$$ns$3$:$(49154>9[$SYN$]$ Seq$=0$ Ack$=0$ Win$=65535$ ns$3$::TcpOptionTS$(0$;$0)$ ns$3$::Tcp$0$ptionWinScale$(2)$ ns$3$::Tcp$0$ptionSackPermitted$([$sack$\_$perm$])$ ns$3$::Tcp$0$ptionEnd$($EOL$))$

$0\mathrm{.}008784/$NodeList$/1/$DeviceList$/0/$$ns$3.$:ScpHer $(9>49153[$SYN$|$ACK$]$ Seq$=0$ Ack$=1$ Win$=65535$ ns$3$::Tcp$0$ptionTS$(5$;$0)$ ns$3$::TcpOptionWinScale$(2)$ ns$3$::Tcp$0$ptionSackPermitted$([$sack$\_$perm$])$ ns$3$::Tcp$0$ptionEnd$($EOL$))$

$0\mathrm{.}011712/$NodeList$/0/$DeviceList$/0/$$ns$3$::PointToPointNetDevice$/$TxQueue$/$Dequeue ns$3$::PppHeader $($Point$-$to$-$Point Protocol: IP $(0$x$0021))$ ns$3$::I

Step $2$: Choose a source node $($n$0)$ and a sink node $($n$3),$ then calculate the following performance metrics:

$$ Round trip delay over time

$$ Minimum round trip delay

$$ Average round trip delay

$$ Maximum round trip delay

Note: For computational efficiency, you must use Linux utility 'grep' or 'awk' $($or both$)$ for your calculation. You are required to document the steps of your Linux commands and calculation. You should present the performance over time using a plot.

More information on the network

The internal representation of the network and network nodes is shown in the following diagram.

The internal representation of the network and network nodes is shown in the

following diagram.

Node n$0$ is a source node. Nodes n$2$ and n$3$ are sink nodes. Node n$1$ is a router.

The network traffic flows are as follows:

$$ n$0=>$ n$2$ TCP segments $($payload size $=50$ bytes$)$

$$ n$0=>$ n$3$ TCP segments $($payload size $=50$ bytes$)$

The IP addresses for the four nodes in the network are configured as follows:

$$ n$0$: $192\mathrm{.}168\mathrm{.}1\mathrm{.}1$

$$ n$1$: $192\mathrm{.}168\mathrm{.}1\mathrm{.}2$ and $192\mathrm{.}168\mathrm{.}2\mathrm{.}1$ and $192\mathrm{.}168\mathrm{.}3\mathrm{.}1$

$$ n$2$: $192\mathrm{.}168\mathrm{.}2\mathrm{.}2$

$$ n$3$: $192\mathrm{.}168\mathrm{.}3\mathrm{.}2$