N$3\mathrm{.}8.$ If a packet's $1$ st and $2$nd fragments have already arrived, but

the $3$rd fragment never comes, the OS will deliver the $1$st and

$2$nd fragments to the upper layer $($transport layer$).$ Is this true

of false? Please explain.

N$3\mathrm{.}10.$ Please create two packets to emulate the Ping$-$of$-$Death attack. Please write Python code.

N$3\mathrm{.}11.$ The following routing entries show four routing rules and the corresponding interfaces.

What interface will be used to route packets to $(1)192\mathrm{.}200\mathrm{.}60\mathrm{.}5,(2)$

$192\mathrm{.}168\mathrm{.}30\mathrm{.}5,$

$(1)192\mathrm{.}168\mathrm{.}60\mathrm{.}5,$ respectively? Please explain why.

$A$: $0*0*0*\frac{0}{0}$ dev interface$-a$

$B$: $192*168*0*\frac{0}{16}$ dev interface$-b$

$C$: $192*168*60*\frac{0}{24}$ dev interface$-c$

$D$: $192*168*60*\frac{5}{32}$ dev interface$-d$

N$3\mathrm{.}12.$ In some Ethernet frame that contains an IP packet, the

destination MAC address in the Ethernet header and the

destination IP address in the IP header are not the same

computer. What is this scenario?

N$3\mathrm{.}14.$ What attack would allow an attacker to turn one attack packet into many? Please describe

this attack in more details.

N$3\mathrm{.}15.$ How does a router know whether it should send out an ICMP redirect message or not?

N$3\mathrm{.}16.$ The following entries are the content of the routing tables on a host A and router R$.$

When we send a packet to $93\mathrm{.}184\mathrm{.}216\mathrm{.}34$ from host A$,$ will we see an ICMP redi$-$ rect

message from somewhere? If so$,$ which machine would send out such a message? Assuming

that all the computers involved are configured to allow ICMP redirect.

$//$ On host A

default via $192\mathrm{.}168\mathrm{.}30\mathrm{.}9$ dev eth$0$

$192\mathrm{.}168\mathrm{.}30\mathrm{.}0/24$ dev eth$0$ proto kernel scope link src $192\mathrm{.}168\mathrm{.}30\mathrm{.}5$

$10\mathrm{.}9\mathrm{.}0\mathrm{.}0/24$ via $10\mathrm{.}9\mathrm{.}0\mathrm{.}9$ dev eth$0$

$//$ On router $R(192\mathrm{.}168\mathrm{.}30\mathrm{.}9)$

default via $192\mathrm{.}168\mathrm{.}30\mathrm{.}1$ dev eth$0$

$192\mathrm{.}168\mathrm{.}30\mathrm{.}0/24$ dev eth$0$ proto kernel scope link src $192\mathrm{.}168\mathrm{.}30\mathrm{.}9$

$10\mathrm{.}9\mathrm{.}0\mathrm{.}0/24$ dev eth$1$ proto kernel scope link src $10\mathrm{.}9\mathrm{.}0\mathrm{.}9$

N$3\mathrm{.}19.$ Can we use ICMP redirect attack to redirect the victim to send its packets to a remote

machine $($i$.$e$.,$ a machine outside of the LAN$).$