Pass4sure 200-120 Question Answer

What will Router1 do when it receives the data frame shown?
Refer to the exhibit:

 What will Router1 do when it receives the data frame shown? (Choose three.)
A.Router1 will strip off the source MAC address and replace it with the MAC address0000.0c36.6965.
B.Router1 will strip off the source IP address and replace it with the IP address 192.168.40.1.
C.Router1 will strip off the destination MAC address and replace it with the MAC address 0000.0c07.4320.
D.Router1 will strip off the destination IP address and replace it with the IP address of 192.168.40.1.
E.Router1 will forward the data packet out interface FastEthernet0/1.
F.Router1 will forward the data packet out interface FastEthernet0/2.

Answer: ACF

Explanation:

Remember, the source and destination MAC changes as each router hop along with the TTL
being decremented but the source and destination IP address remain the same from source to
destination.

Which three statements correctly describe Network Device A?

Refer to the exhibit.

Which three statements correctly describe Network Device A? (Choose three.)

A.With a network wide mask of 255.255.255.128, each interface does not require an IP address. 

B.With a network wide mask of 255.255.255.128, each interface does require an IP address on a unique IP subnet. 

C.With a network wide mask of 255.255.255.0, must be a Layer 2 device for the PCs to communicate with each other. 

D.With a network wide mask of 255.255.255.0, must be a Layer 3 device for the PCs to communicate with each other. 

E.With a network wide mask of 255.255.254.0, each interface does not require an IP address.

Answer BDE

 

Explanation:

If Subnet Mask is 255.255.255.128 the hosts vary from x.x.x.0 – x.x.x.127 & x.x.x.128- x.x.x.255,so
The IP Addresses of 2 hosts fall in different subnets so each interface needs an IP an address so that they can communicate each other.
If Subnet Mask is 255.255.255.0 the 2 specified hosts fall in different subnets so they need a
Layer 3 device to communicate.
If Subnet Mask is 255.255.254.0 the 2 specified hosts are in same subnet so are in network address and can be accommodated in same Layer 2 domain and can communicate with each other directly using the Layer 2 address.