200-301: Cisco Certified Network AssociateDemo

Question

Refer to the exhibit. When PC1 transmits a packet to PC2, what are the packet's source and destination IP addresses when it reaches interface Gi0/0 on router R2?

Question Image

A source 192.168.10.10 and destination 10.10.2.2
B source 192.168.20.10 and destination 192.168.20.1
C source 192.168.10.10 and destination 192.168.20.10
D source 10.10.1.1 and destination 10.10.2.2

Explanation

Routers forward packets based on the Layer 3 header without changing the original source and destination IP addresses, unless a translation feature such as NAT is in use. In this topology, PC1 originates the packet with source IP 192.168.10.10, and the intended endpoint is PC2 at 192.168.20.10. By the time the packet arrives at R2 interface Gi0/0, those IP addresses are still 192.168.10.10 and 192.168.20.10; only the Layer 2 addressing changes from hop to hop.

200-301: Cisco Certified Network AssociateDemo

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