CompTIA
220-801 · Question #733
220-801 Question #733: Real Exam Question with Answer & Explanation
The correct answer is A: Transmits packets it receives to specific connections. A switch is a Layer 2 device that learns MAC addresses and forwards frames only to the specific port where the destination device resides.
Question
Which of the following describes the function of a switch in a network?
Options
- ATransmits packets it receives to specific connections
- BConverts a packet for transmission from one network to another network
- CDetermines whether a packet belongs on an internal or external network
- DBroadcasts packets it receives to all connections
Explanation
A switch is a Layer 2 device that learns MAC addresses and forwards frames only to the specific port where the destination device resides.
Common mistakes.
- B. Converting packets for transmission between different networks is a router function operating at OSI Layer 3, not a switch function.
- C. Determining whether a packet belongs on an internal or external network is a router or firewall function, not a Layer 2 switch function.
- D. Broadcasting to all connections describes a hub, which lacks a MAC address table and has no ability to direct traffic selectively.
Concept tested. Switch MAC address table selective forwarding
Community Discussion
No community discussion yet for this question.