CCNA · Free Practice Question Medium
Question 5
Which two of these functions do routers perform on packets? (Choose two)
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A
Examine the Layer 3 headers of inbound packets and use that information to determine the next hops for the packets
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B
Update the Layer 3 headers of outbound packets so that the packets are properly directed to valid next hops
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C
Update the Layer 3 headers of outbound packets so that the packets are properly directed to their ultimate destinations
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D
Examine the Layer 3 headers of inbound packets and use that information to determine the complete paths along which the packets will be routed to their ultimate destinations
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E
Examine the Layer 2 headers of inbound packets and use that information to determine the next hops for the packets
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F
Update the Layer 2 headers of outbound packets with the MAC addresses of the next hops
Reveal correct answers
Correct answers: A, F
Explanation
Esta é a função básica de um roteador, receber pacotes (modifica-los ou não) e depois encaminhá-los para o destino desejado. Isso é feito lendo os cabeçalhos da Camada 3 dos pacotes de entrada e atualizando as informações do cabeçalho de Camada 2 para os próximos saltos.Discussion
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