Task $5$

The IP Addresses and MAC Addresses for the network shown in Task $4$ is shown below. Some devices do not have an IP Address assigned to them yet, shown in red.$|$

Remember that all the devices in the whole network need to have a unique IP Address.

$\backslash$table$[[,$Port,$\backslash$table$[[$IP$],[$Address$/$Mas$],[$k$]],$MAC Address,$\backslash$table$[[$Default$],[$Gateway$]]],[\backslash$table$[[$PC$],[$A$]],,,\backslash$table$[[$AA:AA:AA:AA:AA:$],[$AA$]],10\mathrm{.}0\mathrm{.}0\mathrm{.}1],[\backslash$table$[[$PC$],[$B$]],,\backslash$table$[[10\mathrm{.}0\mathrm{.}2\mathrm{.}3/2],[4]],\backslash$table$[[$BB:BB:BB:BB:BB:$],[$BB$]],10\mathrm{.}0\mathrm{.}2\mathrm{.}1],[\backslash$table$[[$PC$],[$C$],[$P$]],,,\backslash$table$[[$CC:CC:CC:CC:CC:$],[$CC$]],10\mathrm{.}0\mathrm{.}2\mathrm{.}1],[\backslash$table$[[$PC$],[$D$]],,,\backslash$table$[[$DD: DD: DD: DD: DD:$],[$DD$]],],[\backslash$table$[[$PC$],[$E$]],,\backslash$table$[[10\mathrm{.}0\mathrm{.}2\mathrm{.}4/2],[4]],\backslash$table$[[$EE:EE:EE:EE:EE:$],[$EE$]],10\mathrm{.}0\mathrm{.}2\mathrm{.}1],[$R$1,\backslash$table$[[$Port$],[1]],\backslash$table$[[10\mathrm{.}0\mathrm{.}0\mathrm{.}1/2],[3]],\backslash$table$[[11$:$11$:$11$:$11$:$11$:$],[11]],],[\backslash$table$[[$Port$],[2]],\backslash$table$[[10\mathrm{.}0\mathrm{.}2\mathrm{.}1/2],[4]],\backslash$table$[[22$:$22$:$22$:$22$:$22$:$],[22]],]]$

Task $5$A

What is the lowest available IP Address and subnet mask that we could assign

to PC A$?$ How to answer this question

Open the IP Address Calculator on Moodle.

Find a router that is within the same broadcast domain as PC A$.$ In this case its R$1$ on Port $1$

Find the IP Address and Subnet mask for Port $1$ of $R1$ and enter it into the IP Address Calculator.

The calculator will tell you the broadcast address and the network address. The broadcast address is the highest IP Address, but it is reserved and cannot be used. The network address is the lowest IP Address, but it is reserved and cannot be used.

Therefor the lowest usable IP address is the network address plus $1.$

But that address is in use $($R$1$ is using it$),$ so you would need to pick the next available IP address.

The subnet mask should be the same as the subnet mask as Port $1$ on R$1.$ All devices on the same network should have the same mask. Task $5$B

PC D does not have an IP address assigned to it$.$

What is the highest available IP Address and subnet mask that we could assign

to PC D$?$ What is the default gateway for PC D$?$

Hint: The default gateway is the name for the router that is connects PC D to the other networks. Task $5$D

PC B wants to send a packet to PC E$.$

The packet has been prepared below, what should the destination MAC Address $($red$)$ be for this packet?

How to answer this question

Find the destination IP Address, in this case it is PC E$,10\mathrm{.}0\mathrm{.}2\mathrm{.}4$

Open the IP Address Calculator on Moodle.

Type in the senders IP address and subnet mask, in this case PC B$,10\mathrm{.}0\mathrm{.}2\mathrm{.}3/23.$

The calculator will show you the highest and lowest IP for that network.

Is the destination IP Address between the lowest IP and highest IP address?

a$.$ If it is$,$ then the destination MAC is the MAC Address of PC C$.$

b$.$ If it is not, then the destination MAC is the MAC Address of the default gateway. Task $5$E

PC B wants to send a packet to PC A$.$

The packet has been prepared below, what should the destination MAC Address $($red$)$ be for this

packet? The Destination IP is the IP of PC A$,$ which you calculated in Task $5$A$.$Task $4$

Please carefully read the text. The hub and switch from Task $1$ and $2$ are put into the network

shown below. All desktop computers, switches, and cables are all gigabit $(1000$Mbps$)$ capable.

$R1$ is $100Mpbs$ capable on all ports

Task $4$A

What is the maximum connection speed $($in Mbps$)$ between PC A and PC D$?$

To answer this question, you need to check the maximum speed of all the device that the data would need

to pass though:

What is the maximum speed of PC A$?$

What is the maximum speed of PC D$?$

What is the maximum speed of switch $1?$

What is the maximum speed of the cable between PC A and switch $1?$

What is the maximum speed of the cable between PC D and switch $1?$

Of the speeds listed above, find the lowest value, this is the maximum speed between PC A and PC D$.$