How to Locate a Device's Network Port on a Switch | CompTIA Network+ Exam N10-007
Question
A technician is searching for a device that is connected to the network and has the device's physical network address.
Which of the following should the technician review on the switch to locate the device's network port?
Answers
Explanations
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A. B. C. D.C.
The correct answer is C. MAC table.
Explanation:
A MAC (Media Access Control) address is a unique identifier assigned to network interfaces for communications on the physical network segment. When a device sends data on a network, it includes its MAC address in the data packet. Switches use MAC addresses to forward data to the correct port and device on a network.
A MAC table is a table stored on a switch that maps MAC addresses to the physical ports on the switch. When a device sends data on the network, the switch records the source MAC address and the port that the data came from. The switch uses this information to build a MAC table.
To locate a device on the network using its physical network address (MAC address), a technician can review the MAC table on the switch. The MAC table will show the MAC addresses of devices that are currently connected to the switch and the port to which they are connected.
Reviewing the IP route table (A) is not helpful in locating a device based on its MAC address. The IP route table is used to determine the path that data packets take between devices on different IP subnets.
VLAN tags (B) are used to identify which VLAN a data packet belongs to. VLANs are logical networks created within a physical network. VLAN tags are not helpful in locating a device based on its MAC address.
QoS tags (D) are used to prioritize network traffic. QoS tags are not helpful in locating a device based on its MAC address.
