Question

$Twocomputers{C}_{1}and{C}_{2}areconfigured$
as follows. $C_1$ has IP address 203. 197.2.53 and netmask 255.255.128.0.$C_2$ has IP address 203.197.75.201.128.0.
$C_2$ has IP address 203.197.75.201 and netmask 255.255.192.0.
Which one of the following statements is true?

• A. $C_{1}and{C}_2\text{both assume they are on the same network}$
  
• B. $C_{1}and{C}_2\text{both assume they are on different networks}$
• C. $C_{2}assumes{C}_1\text{is on same network but}{C}_{1}assumes{C}_2\text{is on a different net work}$
• D. $C_{1}assumes{C}_2\text{is on same network, but}{C}_{2}assumes{C}_1\text{is on a different network}$

Answer 1

The correct option is D $C_{1}assumes{C}_2\text{is on same network, but}{C}_{2}assumes{C}_1\text{is on a different network}$

$\text{The two computer}{C}_{1}and{C}_2$
are configured as follows:
$\begin{array}{cccc}& C_1& & C_2\\ IPAddress& \mathrm{203.197.2.53}& & \mathrm{203.197.75.201}\\ AND& & AND& \\ netmask& \underset{–}{\mathrm{255.255.128.0}}& & \underset{–}{\mathrm{255.255.192.0}}\\ & \underset{–}{\mathrm{203.197.0.0}}& & \underset{–}{\mathrm{203.197.64.0}}\\ & NetworkAddress& & NetworkAddress\\ & \mathrm{203.197.2.53}& \to & \mathrm{203.197.00000010.00111001}\\ & \underset{–}{\mathrm{255.255.192.0}}& \to & \underset{–}{\mathrm{255.255.11000000.00000000}}\\ & \underset{–}{\mathrm{203.197.75.0.0}}& \to & \underset{–}{\mathrm{203.197.00000000.00000000}}\\ & \mathrm{203.197.75.201}& & \\ & \underset{–}{\mathrm{255.255.128.0}}& & \\ & \underset{–}{\mathrm{203.192.0.0}}& & \end{array}$
$\therefore C_{1}assumes{C}_2\text{is on same network but}$
$C_{2}assumes{C}_1\text{is on different network.}$