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200-150 · Question #84

Which three options describe routers compared to switches? (Choose three.)

The correct answer is A. use IP address tables for information lookup B. concerned with packet forwarding C. operate at Layer 3 of the OSI model. Routers operate at OSI Layer 3, use IP routing tables for path determination, and are responsible for forwarding packets between different networks.

Cisco Data Center Networking Technologies

Question

Which three options describe routers compared to switches? (Choose three.)

Options

  • Ause IP address tables for information lookup
  • Bconcerned with packet forwarding
  • Coperate at Layer 3 of the OSI model
  • Doperate at Layer 2 of the OSI model
  • Euse MAC address tables for information lookup
  • Fconcerned with the local delivery of frames

How the community answered

(28 responses)
  • A
    93% (26)
  • D
    4% (1)
  • E
    4% (1)

Why each option

Routers operate at OSI Layer 3, use IP routing tables for path determination, and are responsible for forwarding packets between different networks.

Ause IP address tables for information lookupCorrect

Routers consult IP routing tables to determine the best next-hop path for packets destined for remote networks, making IP address lookup their core forwarding mechanism.

Bconcerned with packet forwardingCorrect

The primary function of a router is packet forwarding - examining Layer 3 IP headers to move traffic between different logical networks.

Coperate at Layer 3 of the OSI modelCorrect

Routers operate at the Network layer (Layer 3) of the OSI model, enabling inter-network communication through logical IP addressing and routing protocols.

Doperate at Layer 2 of the OSI model

Layer 2 (Data Link) is where switches operate, handling local frame delivery within a broadcast domain using MAC addresses.

Euse MAC address tables for information lookup

MAC address tables are built and used by switches at Layer 2 to forward frames within a local network segment, not by routers.

Fconcerned with the local delivery of frames

Local delivery of frames is a Layer 2 function performed by switches within a network segment, not a responsibility of routers.

Concept tested: Router vs switch OSI layer roles

Source: https://www.cisco.com/c/en/us/solutions/small-business/resource-center/networking/networking-basics.html

Topics

#routers vs switches#Layer 3#packet forwarding#IP address tables

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